D I R E C T O R ’ S M E S S A G E

At IIT Delhi, we are committed to creating an ecosystem for generation of new ideas and advancement of scientific knowledge for the benefit of mankind. In order to address the societal problems and to push the frontiers of knowl-edge, we have taken several steps and launched various programmes to strengthen the multi-disciplinary research culture on the campus. Some of these initiatives include setting up of a School of Interdisciplinary Research (SIRe), launching a Faculty Interdisciplinary Research Programme (FIRP), creation of a Nano-scale Research Facility (NRF), establishing strong linkages with the All India Institute of Medical Sciences (AIIMS), various DRDO and Indian Coun-cil for Agricultural Research (ICAR) laboratories, All India Institute of Ayurveda etc. A Joint Advanced Technology Center (JATC) in collaboration with DRDO has been recently set up at IIT Delhi with a goal to carryout interdisciplinary research with well-defined goals of developing advanced technologies and products. IITD has also provided institutional support to about 60 interdisciplinary projects and 40 student Start-ups under the Discovery & Learn 1-2-3-4 projects. We have also recently enhanced the central pool of experi-mental research facilities for nano-research through creation of a Nanoscale Research Facility with funding from MeitY, DST, MHRD and from our own internal sources. Currently, Nanoscience and Nanotechnology are among the strong areas of research focus at IIT Delhi in terms of number of faculty engaged in these areas and the external sponsored projects. The research in the institute encompasses both basic as well as applied technology areas of national importance. The research activities in the area of Nanoscience and Nanotechnology at IIT Delhi were seeded with support from the Nano Mission Programme of DST in the form of a Unit on Nano Science and a number of research projects.

On the occasion of the decennial edition of the Bengaluru INDIA NANO 2018, IIT Delhi is pleased to bring out this booklet summarizing the research activities in the area of Nanoscience and Nanotechnology being carried out at IIT Delhi. We hope this encourages researchers in India as well as in the rest of the world to collaborate with our researchers and advance the frontiers of this very interesting field.

With Best Wishes, Prof. V. Ramgopal Rao

(Fellow IEEE, FNA, FNAE, FASc, FNASc) Director,

Indian Institute of Technology Delhi1 1

18. Sujeet Chaudhary Magnetism and spintronics 40

19. Vamsi Krishna Komarala Solar cells and Plasmonics 42

20. Vikram Kumar Semiconductor materials, devices and technology, nanomaterials 44

Applications of Nanoscale Systems

21. Abhisek Dixit Device & wafer-level characterization 48

22. Ankur Gupta RF Microelectronics, CMOS Circuit Design 50

23. Anuj Dhawan Nanophotonics and Plasmonics 52

24. Ashwini K. Agrawal Smart materials and innovative textile applications 54

25. Bhaskar Mitra MEMS and Microsensors 56

26. Debanjan Bhowmik Spintronics, Low power electronics 58

27. Madhusudan Singh Flexible and printable devices and sensors 60

28. Manan Suri Nanoelectronics 62

29. Manjeet Jassal Smart materials and innovative textile applications 64

30. Nitya Nand Gosvami Nanomechanics and Nanotribology of Materials 66

31. Pushpapraj Singh Microelectromechanical systems (MEMS) sensors 68

32. S. Aravindan Mechanical Engineering 70

33. S. K. Khare Nanobiocatalysis and Nanotoxicity 72

34. Saakshi Dhanekar Nano-materials and nano-devices for gas- and bio-sensing, MEMS, microfluidics 74

35. Samaresh Das Nanoelectronics and Optoelectronics 76

36. Sandeep K. Jha Lab-on-a-chip, Biosensors, microfluidics 78

Physics of Nanoscale Systems P. No.

1. B.R. Mehta Nanostructured materials for energy applications 6

2. Banshi Dhar Gupta Optical fiber Plasmonic sensors 8

3 Brajesh Kumar Mani Computational Condensed Matter Physics 10

4. G. Vijaya Prakash Nanophotonics, nanofunctional and hybrid materials 12

5. Hitendra K.Malik Nanostructures 14

6. J. P. Singh Chemical vapor deposition (CVD) and glancing angle deposition (GLAD), Microscopic characteriza-tion (STM & AFM), Nanomechanics, SERS, Gas sensing.

16

7. Joby Joseph Photonic crystals, Interference lithography, Digital holography, OLED light extraction 18

8. Neeraj Khare Synthesis of semiconducting, magnetic, ferroelectric, superconducting nanostructure/nanocompos-ites

20

9. P. K. Muduli Spintronics and Nanomagnetism 22

10. Pintu Das Nanomagnetism 24

11. Rajendra Singh Semiconductor Nanowires, 2D materials, Nanoscale devices 26

12. Rajendra S Dhaka Novel Materials and Interface 28

13. Ratnamala Chatterjee Magnetics & Advanced Ceramics 30

14. Ravi Kant Soni Laser Processing of Nanomaterials 32

15. Ravikrishnan Elangovan Optics to visualize micro-nano-cosmos of biological world and applying them to develop invitro diagnostics technologies

34

16. Santanu Ghosh Nanostructured materials 36

17. Saswata Bhattacharya Computational Materials Science 38

C O N T E N T S P. No.

2 3

37. Suddhasatwa Basu Electrochemical Storage; Micro Fluidic Devices 80

38. V Ramgopal Rao Nanoscale devices for electronics and sensor applications 82

Chemistry of Nanoscale Systems

39. Ashok K. Ganguli Solar Energy Conversion, Electrochemical Fuel Generation & Water Purification 86

40. Bhanu Nandan Self-Assembly in Polymers, Functional Nanofibers 88

41. Dr. Jayati Sarkar Instabilities at soft interfaces, self organization of nanostructures 90

42. M Ali Haider The Renewable Energy and Chemicals 92

43. Pravin P. Ingole Electrochemistry and Nanomaterials 94

44. Sameer Sapra Synthesis of Nanomaterials 96

Bioscience of Nanoscale Systems

45. Anushree Malik Environmental Microbiology, Bioremediation, Biopesticides, Antimicrobial compounds 100

46. Archana Chugh Cell penetrating peptides 102

47. Arun Kumar Effects of nanomaterials on biodegradation; Reuse of nanomaterials-contaminated water; Risk due to exposures to nanomaterials

104

48. Bhuvanesh Gupta Nanobiomaterials 106

49. Harpal Singh Centre for Biomedical Engineering 108

50. Jayanta Bhattacharyya Development of bio-inspired and bio-derived nano-materials to meet unmet needs in treating and diagnosing disease

110

51. Neetu Singh Nanomedicine 112

52. Prashant Mishra Nanoparticle based drug delivery and protein based nanodevices 114

53. Sitikantha Roy Nano-Biomechanics, Micro-fluidic electronics, soft robotics, nanotechnology in soft material, AFM force spectroscopy, Higher harmonic imaging, Energy harvesting.

116

Physics of Nanoscale Systems P. No.

54

Mujeeb Ahmad, Deepak Varandani, and Bodh R. Mehta, Appl. Phys. Lett. 113, 141603, 2018.

ii. On the nature of AFM tip metal-MoS2 contact; effect of single layer character and tip force., Vishakha Kaushik, Deepak Varandani, Pintu Das, and Bodh R. Mehta, Appl. Phys. Lett. 111, 141601, 2017.

iii. KPFM based investigation on the nature of Sb2Te3:MoS2 and Bi2Te3:MoS2 2D interfaces and its effect on the electrical and thermoelec-tric properties. Mujeeb Ahmad, Khushboo Agarwal, Navnita Kumari, Bodh R. Mehta, Appl. Phys. Lett., 111, 023904-023909, 2017.

iv. Enhanced charge separation at 2D MoS2/ZnS heterojunction: KPFM based study of interface photovoltage. Intu Sharma and Bodh R. Mehta, Appl. Phys. Lett. 110, 061602, 2017.

v. Oxygen Induced Enhanced Photoanodic Response of ZnTe:O Thin Films: Modifications in Optical and Electronic Properties. Intu Shar-ma, Aadesh P. Singh, Neha Tyagi, Nishant Saini, Sushil Auluck, Bodh R. Mehta J. Phys. Chem. C 121, 1488−1497, 2017.

KPFM based study in surface and junction modes of MoS2/ZnS heterojunctions having monolayer [MS(M)/ZnS] , few layer [MS(F)/ZnS] and bulk [MS(B)/ZnS] thickness of MoS2 layers

PROFESSOR Schlumberger Chair Professor Department of Physics Telephone:+91-11-2659 1333 Office: MS 417 Lab: MS401 A-B Email: brmehta@physics.iitd.ac.in; brmehta_p@hotmail.com Web: http://web.iitd.ac.in/~brmehta/

ResearchThe central theme of our research work is the science and technology of thin films and nanostructured materials for solar cell, photoelectro-chemical, thermoelectric and gas sensing applications. The main highlight of our work has been implementing a new methodology for the large scale and continuous synthesis of size selected nanoparticles having monosized distributions. Metal (Pd, Ag, Cu), alloy (Pd-Cu, Pd-Ag, Si-Sn) and Pd-graphene core shell nanoparticles prepared by this method have been used for sensor, solar cell and plasmonic applications. Two dimensional MoS2 layers grown by CVD technique have been integrated into thin films for fabricating intermediate band gap semicon-ductors for next generation solar cell devices. Effect of semiconductor-2D layer interfaces on electron transport and phonon scattering has been utilized to improve the thermoelectric figure of merit in semiconductor-Graphene and semiconductor-MoS2 composite nano-structures. KPFM technique has been used to study 2D layer interfaces in Si-Graphene and CZTSSe-CdS solar cells. Inorganic-organic hybrid Interfaces of copper oxide with hexa-peri-hexabenzocoronene based monolayer materials have been studied. Electronic properties of these interfaces can be tuned by controlling structural and electronic properties of inorganic (CuO, Cu2O) and organic counterparts (HBC, HBC-6F), modifying the device characteristics of resulting resistive memory devices.

Representative Publicationsi. Large surface charge accumulation in 2D MoS2/Sb2Te3 junction and its effect on junction properties: KPFM based study.

B. R. Mehta

6 7

iv. V. Semwal, A.M. Shrivastav, R. Verma and B.D. Gupta, Sensors and Actuators B 230, 485 (2016).

v. R.Kant, R. Tabassum and B.D. Gupta, IEEE Photonics Technology Letters 28, 2050 (2016).

(a) Graphene doped ZnO nanofibers for L-nicotine (b) MIP nanoparticle used for the sensing of erythromycin (c) Ag NPs grown over ZnO NWDG for the sensing of H2O2

(d) Experimental setup (e) SPR spectra for 0 and 4% H2 gas

PROFESSOR Department of Physics Optical fiber plasmonic sensors Telephone: +91 11 2659 1355 Office: MS 436, Lab: MS 207/C-3 Lab: MS 207/C-3 Email: bdgupta@physics.iitd.ac.in Web: web.iitd.ac.in/~bdgupta

ResearchThe research group led by Prof. B.D. Gupta (Physics Department, IIT Delhi) is involved on the research and development activities on opti-cal fiber plasmonic sensors for the detection of various chemicals, biological analytes and gases. He has entrenched the field for real time analysis using the techniques of SPR (Surface Plasmon Resonance), LSPR (Localized Surface Plasmon Resonance) and LMR (Lossy Mode Resonance). He has reported sensors for the monitoring of H2S, Cl2, NH3, H2 and methane gases, food quality control, pesticides and heavy metal ions in water, and for the sensing of biologically crucial analytes such as cortisol, glucose, erythromycin, urea, pH, vitamins and many more. The application of nanostructures of metals and metal oxides such as ITO and ZnO has ascertained simple and low cost sensors with direct immobilization of ligands for sensing. Molecular imprinting technique has been incorporated for the sensing of melamine in milk, tetracycline in water and pesticides in waste water.

Representative Publicationsi. R. Tabassum and B.D. Gupta, Biosensors and Bioelectronics 86, 48 (2016).

ii. A.M. Shrivastav, S. P. Usha and B.D. Gupta, Nanotechnology 27, 345501 (2016).

iii. S.P. Usha, A.M. Shrivastav and B.D. Gupta, Biosensors and Bioelectronics 87, 178 (2017).

Banshi Dhar Gupta

8 9

reva, Sci. Rep. 6, 19590 (2016); doi:10.1038/srep19590

iv. Nanoscale properties of PbZrO3 nanowires: phase competition for enhanced energy conversion and storage, R. Herchig, B. K. Mani, S. Lisenkov, and I. Ponomareva, Comput. Mater. Sci. 117, 468 (2016); http://dx.doi.org/10.1016/j.commatsci.2016.02.011

v. Critical Thickness for Antiferroelectricity in PbZrO3, B. K. Mani, C.-M. Chang, S. Lisenkov, and I. Ponomareva, Phys. Rev. Lett. 115, 097601 (2015); https://doi.org/10.1103/PhysRevB.92.064101

ASSISTANT PROFESSOR Department of Physics Computational Condensed Matter Physics Telephone: +91-11-2659-6389 Office: VI-415D Email: bkmani@physics.iitd.ac.in Web: http://web.iitd.ac.in/~bkmani/

ResearchWe develop and use first-principles computational models to probe the exciting physics and corresponding technological application in condensed matter systems in bulk and nanostructure forms. The condensed matter systems we study include (anti)ferroelectrics, (anti)ferromagnetics, multiferroics, and relaxor ferroelectrics. The unprecedented functional properties of these materials are key to several technological applications. Some examples include energy and charge storage devices, electrocaloric refrigerators, high strain actuators and transducers, magnetic field sensors, spin filters, four logical states devices, and ferroelectric random access memory. The computational methods we employ include the density functional theory and based methods, effective Hamiltonian based atomistic models, molecular dynamics and Monte Carlo simulations, and genetic algorithm based optimization methods.

Representative Publicationsi. Emergence of ferroelectricity in antiferroelectric nanostructures, B. K. Mani, R. Herchig, E. Glazkova, S. Lisenkov, and I. Ponomareva,

Nanotechnology 27, 195705 (2016); http://dx.doi.org/10.1016/j.commatsci.2016.12.002

ii. Highly tunable piezocaloric effect in antiferroelectric PbZrO3, S. Lisenkov, B. K. Mani, J. Cuozzo and I. Ponomareva, Phys. Rev. B, 93, 064108 (2016); https://doi.org/10.1103/PhysRevB.93.064108

iii. Scaling law for electrocaloric temperature change in antiferroelectrics, S. Lisenkov, B.K. Mani, E. Glazkova, C.W. Miller and I. Ponoma-

Brajesh Kumar Mani

10 11

PROFESSOR Department of Physics, Group Leader, NanoPhotonics labs Ph: +91-11-2659 1326 (O), 6295 (L) Email: prakash@physics.iitd.ac.in Web: http://nanophotonics.iitd.ac.in/

ResearchThe Nanophotonics group is focused on the research of nano and microphotonic materials, optically-active and novel photonic bandgap structures. Our research interests focus on a wide range of device-oriented activities, including passive/active optoelectronics devices, Superlattices, Semiconductor multilayers, MOS devices, silicon based heterostructures, Inorganic-Organic semiconductor heterostructures, and rare-earth-based broad band sources for telecommunication applications and ultrafast-laser matter interactions.

Representative Publicationsi. “Laser induced microstructuring of two-dimensional layered inorganic-organic perovskites” Pawan K. Kanaujia, G. Vijaya Prakash,

Phys. Chem. Chem. Phys., 2016,18, 9666-9672.

ii. “ In Situ Intercalation Dynamics in Inorganic Organic Layered Perovskite Thin Films,”Shahab Ahmad, Pawan K. Kanaujia, Wendy Niu, Jeremy J. Baumberg, and G. Vijaya Prakash, ACS Applied Materials and Interfaces, 6(13) (2014) 10238;

iii. “Hexagonally Ordered KLaF4 Host: Phase Controlled Synthesis and Luminescence Studies “ R. Nagarajan, Shahzad Ahmad, and G. Vijaya Prakash, Inorganic Chemistry. 51 (2012) 12748.

iv. “Exciton Switching and Peierls transitions in hybrid inorganic-organic self-assembled quantum wells”, K. Pradeesh, J. J. Baumberg and G. Vijaya Prakash, Applied Physics Letters 95 (2009) 173305.

G. Vijaya Prakash v. “Strong Exciton-Photon coupling in Inorganic-Organic Multiple Quantum Wells Embedded Low-Q Microcavity”, K. Pradeesh, J. J. Baumberg and G. Vijaya Prakash, Optics Express 17 (2009) 22171.

12 13

Physics Letters (2013) 102, 221903.

iv. N. Dwivedi, S. Kumar, I. Rawal, and H. K. Malik, “Influence of Consumed Power on Structural and Nano-mechanical Properties of Nano-structured Diamond-like Carbon Thin Films” Applied Surface Science (2014) 300, 141.

v. N. Dwivedi, R. McIntosh, C. Dhand, S. Kumar, H. K. Malik, and S. Bhattacharyya, “Structurally Driven Enhancement of Resonant Tunnel-ing and Nano-mechanical Properties in Diamond-like Carbon Superlattices” ACS Applied Materials and Interfaces (2015) 7, 20726.

Figure1. Zno, DLC Films showing the application of nanostructures discussed above.

PROFESSOR Department of Physics Nanostructures Telephone: +91 11 2659 1303 Office: MS 519 Lab: Plasma Waves and Particle Acceleration (PWAPA) Laboratory Email: hkmalik@physics.iitd.ac.in Web: http://web.iitd.ac.in/~hkmalik/

ResearchOne of the objectives of our lab has been towards development of nanostructures in diamond like carbon films for their strange hardness. However, by introducing foreign elements in these films we could also reduce the stress and lowered the threshold voltage for their better electronic applications. We also work on ZnO films, where anisotropy / inhomogeneity is introduced at nanoscale for achieving higher mag-netic properties by maintaining the smoothness, contrary to the normal approaches. This is done with the application of accelerated heavy ion beams. On the other hand, we have been working on the growth of nanowires using molecular beam epitaxy approach. In addition, growth parameters have been optimized for GaSb Quantum Dots on GaAs substrate using this approach. We also aim at producing silver nanoparticles for their sensing applications.

Representative Publicationsi. N. Dwivedi, S. Kumar, and H. K. Malik, “Strange Hardness of Hydrogenated Diamond-like Carbon Thin Film by PECVD Process” Applied

Physics Letters (2013) 102, 011917.

ii. J.S. Sekhon. H. K. Malik, and S.S. Verma, “Tailoring Surface Plasmon Response Wavelengths and Sensoric Potential of Core-Shell Metal Nanoparticles” Sensor Letters (2013) 11, 512.

iii. P. Kumar, H. K. Malik, A. Ghosh, R.Thangavel, and K. Asokan, “Band gap tuning in highly c-axis oriented Zn1-xMgxO thin films” Applied

Hitendra K. Malik

14 15

v. Mechanical Strain Induced Tunable Anisotropic Wetting on Buckled PDMS Silver Nanorods Arrays, Pratibha Goel, Samir Kumar, Jayati Sarkar and Jitendra P. Singh, ACS Applied Materials & Interfaces, 7, (2015) 8419–8426.

Reversible Wetting/dewetting of ZnO nanowires 3-D SERS cage for bacterial sensing

PROFESSOR Department of Physics Telephone: +91 11 2659 1323 Office: MS 104 Lab: MS 532D Email: jpsingh@physics.iitd.ac.in Web: web.iitd.ac.in/~jpsingh

Research

We use a novel growth technque glancing angle deposition (GLAD) to fabricate different morphology such as zig-zag, nanosprings, cantile-vers and vertically standing of metal and metal oxide nanostrctures. The grown nanostructures have been utilized in various applications like gas sensing, superhydrophobic/superhydrophilic surface preparation, water filtration and surface enhanced Raman spectroscopy (SERS) based chemical and biological sensing.

Representative Publicationsi. ZnO nanowires coated smart surface mesh with reversible wettability for efficient on demand oil/water separation, Parul Raturi, Kavita

Yadav, and JP Singh, ACS Appl. Mater. Interfaces, 9 (2017) 6007-6013.

ii. Flexible and robust SERS active substrates for conformal rapid detection of pesticide residues from fruits, S Kumar, P Goel, and JP Singh, Sensors and Actuators B: Chemical, 241 (2017) 577–583.

iii. A fast and effective approach for reversible wetting-dewetting transitions on ZnO nanowires, Kavita Yadav, B. R. Mehta, Saswata Bhat-tacharya and J. P. Singh, Scientific Reports 6, (2016) 35073.

iv. A Facile method for fabrication of buckled PDMS silver nanorod arrays as active 3D SERS cage for bacterial sensing, Samir Kumar, Devesh K. Lodhi, Pratibha Goel, Neeti, Prashant Mishra, and J. P. Singh, Chemical Communications 51 (62), (2015) 12411-12414.

J. P. Singh

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ports 7 (2017) 7607.v. S Behera and J Joseph, Design and fabrication of woodpile photonic structures through phase SLM-based interference lithography for

omnidirectional optical filters, Optics Letters 42 (2017) 2607-2610.vi. R Yukino, PK Sahoo, J Sharma, T Takamura, J Joseph and A Sandhu, Wide wavelength range tunable one-dimensional silicon nitride

nano-grating guided mode resonance filter based on azimuthal rotation, AIP Advances 7 (2017) 015313.vii. PK Sahoo, BD Choudhury, J Joseph and S Anand, ZnO nanowire-enabled light funneling effect for antireflection and light convergence

applications, Optics Letters 42 (2017) 45-48.viii. S Behera and J Joseph, Single-step optical realization of bio-inspired dual-periodic motheye and gradient-index-array photonic struc-

tures, Optics Letters 41 (2016) 3579-3582.

Joby Joseph

PROFESSOR Department of Physics Photonics Research Laboratory Telephone: +91 11 2659 1336 Office: MS-422 Lab: MS-424 Email: joby@physics.iitd.ac.in Web: http://web.iitd.ac.in/~joby/

ResearchWe focus on large area and single step fabrication approaches based on phase SLM assisted and Lloyd mirror interference lithography techniques, for realization of sub-micron linear grating, 2D periodic & quasi-periodic and chiral photonic structures on photoresist. Lasers at wavelengths of 325nm, 355nm, 405nm and 442nm are used for fabrication of nano-photonic structures of dimensions ranging from 300nm to 2 microns covering 5 to 20mm area. This approach opens up the flexibility of interference lithography to fabricate more complex sub-micron photonic structures for applications in sensors, metamaterials, micro-resonators, light trapping, light guiding and many future applications.

Representative Publicationsi. R Yukino, J Sharma, T Takamura, J Joseph and A Sandhu, Magnetic nanoparticle-based nano-grating guided-mode resonance biosen-

sors, IEEE, Transactions on Magnetics 54 (2018) 1-6.ii. A Kapoor and J Joseph, Design of custom photonic crystal cavities using interference lithography in combination with sidelobe-

suppressed Bessel beam and optical phase engineering, Journal of Nanophotonics 11 (2017) 046024.iii. S Behera and J Joseph, Plasmonic metamaterial based unified broadband absorber/near infrared emitter for thermophotovoltaic

system based on hexagonally packed tungsten doughnuts, Journal of Applied Physics 122 (2017) 193104.iv. PK Sahoo, S Sarkar and J Joseph, High sensitivity guided-mode-resonance optical sensor employing phase detection, Scientific Re-

18 19

iv. Coupling of piezoelectric, semiconducting and photoexcitation properties in NaNbO3 nanostructures for controlling electrical trans-port: Realizing an efficient piezo-photoanode and piezo-photocatalyst, S. Singh, Neeraj Khare, Nano Energy 38, 335-341 (2017)

v. Valence Change Bipolar Resistive Switching Accompanied With Magnetization Switching in CoFe2O4 Thin Film, S. Munjal, Neeraj Khare, Scientific reports 7, 12427 (2017)

vi. Spur-line based magnetically tunable bandstop filter using partially magnetized ferrite thin films, D. Sharma, Neeraj Khare, S. K. Koul, M. P. Abegaonkar, Applied Physics Letters 110, 182401 (2017)

vii. Electrically tuned photoelectrochemical properties of ferroelectric nanostructure NaNbO3 films, S. Singh, Neeraj Khare, Applied Phys-ics Letters 110, 152902 (2017)

Effect of strain/defects and size on magnetic properties of CoFe2O4 nanostructures

Bi2S3 Nanoflowers CdS/CoFe2O4 (CFO) core/shell nanostructures

PROFESSOR Coordinator, Nanoscale Research Facility Department of Physics Telephone: +91 11 2659 1352 Office: MS 504 Lab: MS 408 Email: nkhare@physics.iitd.ernet.in Web: web.iitd.ac.in/~nkhare

ResearchProf. Neeraj Khare research interest is in the synthesis of semiconducting, magnetic, ferroelectric, superconducting nanostructure/nano-composites and explore its potential for novel applications such as for enhanced photodegradation of organic dyes in industrial waste water, photoelectrochemical water splitting for H2 production, nanogenerator for harnessing mechanical energy, thermoelectric devices, solar cells, microwave tunable filters, resistive switching memories, superhydrophobic surfaces, higher critical current of superconductor etc. He has demonstrated a correlation in the presence of intrinsic strain/defects in the CFO nanostructures and its effect on tunning the magnetic and optical properties. The core/shell nanostructures/nanocomposites combining semiconducting/magnetic and ferroelectric exhibited enhanced photocatalytic properties and electrical/magnetic tunning of the performance.

Representative Publicationsi. Flexible ZnO-PVDF/PTFE Based Piezo-Tribo Hybrid Nanogenerator, H. H. Singh, Neeraj Khare, Nano Energy 51, 216-222 (2018)ii. Low field magneto-tunable photocurrent in CoFe2O4 nanostructure films for enhanced photoelectrochemical properties, S. Singh,

Neeraj Khare, Scientific reports 8, 6522 (2018)iii. Electroforming free controlled bipolar resistive switching in Al/CoFe2O4 /FTO device with self compliance effect, S. Munjal, Neeraj

Khare, Applied Physics Letters 112, 073502 (2018)

Neeraj Khare, FNASc, FAPAM, FInstP

Magnetic separation of CdS/(CFO) core/shell nanostructures after dye degradation

20 21

K. Muduli, E. Iacocca, A. Eklund, R. K. Dumas, S. Bonetti, A. Deac, M. Hoefer, and J. Åkerman, Science, 339, 6125 (2013).

v. Decohorence and mode-hooping in MgO basedspin torque oscillators, P. K. Muduli, O. G. Heinonen, and Johan Åkerman, Phys. Rev. Lett. 108, 207203 (2012).

ASSOCIATE PROFESSOR Department of Physics Spin Dynamics Lab Telephone: +91 11 2659 1377 Office: MS 432 Lab: MS 401F Email: muduli@physics.iitd.ac.in Web: https://sites.google.com/site/spiniitd/

Research

Our group is working on nanomagnetism and spintronics with emphasis on spin torque induced magnetization dynamics. We are interested in study of magnetization dynamics at nanoscale, with focus on spin torque nano-oscillators (SNTO) and spin Hall nano-oscillators. We are also working on spin Hall effect, spin pumping, nanoscale tiny objects called magnetic skyrmions which are very recent developments in the field of spintronics.

Representative Publicationsi. Enhancement of spin-torque diode sensitivity in a magnetic tunnel junction by parametric synchronization, D. Tiwari, N. Sisodia, R.

Sharma, P. Dürrenfeld, J. Åkerman, and P. K. Muduli, Appl. Phys. Lett. 108, 082402 (2016)

ii. Mode-hopping mechanism generating colored noise in a magnetic tunnel junction based spin torque oscillator, Raghav Sharma, P. Dürrenfeld, E. Iacocca, O. G. Heinonen, J. Åkerman, and P. K. Muduli, Appl. Phys. Lett. 105, 132404 (2014).

iii. Mutually synchronized bottom-up multi-nanocontact spin–torque oscillators, S. Sani, J. Persson, S.M. Mohseni, Ye Pogoryelov, P.K. Muduli, A. Eklund, G. Malm, M. Käll, A. Dmitriev and J. Åkerman, Nature Comm., 4, 2731 (2013).

iv. Spin Torque Generated Magnetic Droplet Solitons, S. M. Mohseni, S. R. Sani, J. Persson, T. N. Anh Nguyen, S. Chung, Ye. Pogoryelov, P.

P. K. Muduli

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P. Das (submitted).

iv. Signatures of Skyrmion phase in FeGe single crystals in micro-Hall magnetometry studies, P. Das, M. Schmidt, U. Roessler and J. Muel-ler (in preparation).

v. On the influence of nanometer-thin antiferromagnetic surface layer on ferromagnetic CrO2 , P. Das, A Bajpai, Y. Ohno, H. Ohno and J. Müller J. Appl. Phys. 112, 053921 (2012).

Figure: (left) α-Fe filled in a single carbon nanotube placed in the active area of a submicron Hall magnetometer. (right) Hysteresis loop measured due to the single magnetic nanostructure.

ASSISTANT PROFESSOR Department of Physics Telephone: +91 11 2659 1324 Office: MS 510 Lab: MS 541 Email: pintu@physics.iitd.ac.in Web: http://web.iitd.ac.in/~pintu/

ResearchWe are interested in the understanding of switching processes and the dynamics in nanoscale magnetic elements or arrays - which can be substantially controlled via the size, shape or density of elements in an array. One of our main interests is in the investigation of the switch-ing processes in individual magnetic nanoelements, novel magnetic nanostructures, etc. where entire magnetic signal, without any loss due to averaging process, can be captured. For measurements of such low-signal samples, we employ state of the art two-dimensional electron gas (2-DEG) based micro-Hall magnetometry method. Hall devices from such high mobility materials are fabricated using lithography tech-niques at the nano research facility of IIT Delhi. The figure below shows the stray field measurements of hysteresis loop of an α-Fe nanorod filled in a single carbon nanotube using such 2-DEG based Hall sensors.

Representative Publicationsi. Magnetization reversal and emergent magnetic monopole-like state in square artificial spin ice vertex with defects , N. Keswani and

P. Das, AIP Advances 8, 101501 (2018)

ii. Fabrication and characterization of sub-micron scale Hall devices from 2-dimensional electron gas at the heterostructure of GaAs/AlGaAs, N.Keswani, Y. Nakajima, N. Chauhan, S. Kumar, H. Ohno and P. Das, AIP Conference Proceedings, 1953, 050071 (2018).

iii. Effect of vertex-edges on the switching behavior of two-dimensional artificial spin ice systems in a square geometry, N. Keswani and

Pintu Das

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iv. Barrier inhomogeneities limited current and 1/f noise transport in GaN based nanoscale Schottky barrier diodes, Scientific Reports 6 (2016) 27553 (11pp).

v. Study of high quality spinel zinc gallate nanowires grown using CVD and ALD techniques, S. Kumar, G. Sarau, C. Tessarek, M. Goebelt, S. Christiansen, and R. Singh, Nanotechnology 26 (2015) 335603 (9pp).

vi. Self-catalytic growth of b–Ga2O3 nanostructures by chemical vapor deposition, Sudheer Kumar, R. Singh, Adv. Eng. Mater. 17 (2015) 709 – 715.

vii. Surface plasmon enhanced bandgap emission of electrochemically grown ZnO nanorods using Au nanoparticles, T. Singh, D.K. Pandya and R. Singh, Thin Solid Films, 520 (2012) 4646.

Rajendra Singh PROFESSOR

Department of Physics Semiconductor Nanowires, 2D materials, Nanoscale devices Telephone: +91 11 2659 6495 Office: MS 312 Lab: MS207/C19 Email: rsingh@physics.iitd.ac.in Web: web.iitd.ac.in/~rsingh

ResearchIn the area of nanoscience/nanotechnology, we are interested in studying the growth and properties of semiconductor nanowires and 2D materials and also nanoscale devices based on these nanomaterials. The semiconductor nanowires such as GaN and Ga2O3 are grown using hot-wall CVD technique. The 2D materials are grown/fabricated using CVD/exfoliation technique. The nanoscale devices such as Schottky diodes and UV photodetectors are fabricated using electron-beam lithography (EBL) and maskless lithography techniques. We have fabri-cated high quality/performance nanodevices on semiconductor wires and 2D materials. In the recent times our interest has also been on understanding the current transport process in few layer and monolayer 2D materials based few nanodevices and heterojunctions.

Representative Publicationsi. Understanding of MoS2/GaN heterojunction diode and its photodetection properties, Monika Moun, M. Kumar, M. Garg, R. Pathak

and R. Singh, Scientific Reports 8 (2018) 11799 (9 pp).

ii. Significant improvement in the electrical characteristics of Schottky diodes on molecularly modified gallium nitride, M. Garg, T.R. Naik, V. R. Rao and R. Singh, Appl. Phys. Lett. 112 (2018) 163502 (5pp)

iii. Enhanced thermionic emission and low 1/f noise in exfoliated graphene/GaN Schottky barrier diode, ACS Appl. Mater. Interfaces 8 (2016) 8213-8233.

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Rajendra S. Dhaka

Assistant Professor Department of Physics Novel Materials and Interface Physics Laboratory Telephone: +91-11-2659-1439 (o), 6067 (lab) Office: II-421A Lab: MS 402 Email: rsdhaka@physics.iitd.ac.in Website: web.iitd.ac.in/~rsdhaka/

Research Experimental Condensed Matter Physics, Cathode materials for Na-ion batteries (nanostructures and thin-films), Half-metallic Heusler al-loys (polycrystalline and thin-films), Single crystal growth (Fe-based superconductors, Topological Insulators, etc.), Complex oxides including double perovskites (bulk and heterostructures). Energy storage applications, Spintronic and thermoelectric applications, Solar-cell applica-tions, Solid oxide fuel cells, Strongly correlated physics.

Representative Publications:i. M. Chandra, R. Shukla, M. Rashid, Amit Gupta, S. Basu, and R. S. Dhaka*, `Synthesis and physical properties of NaXTO2 (T = Mn, Co)

nanostructures for cathode materials in Na-ion batteries’ Materials Research Bulletin, 105, 178 (2018).

ii. M. Chandra, R. Shukla, R. Saroha, A. K. Panwar, Amit Gupta, S. Basu, and R. S. Dhaka*,`Physical properties and electrochemical per-formance of Zn-substituted Na0.44Mn1-XZnXO2 nanostructures as cathode in Na-ion batteries’ Ceramics International, 44, 21127 (2018).

iii. Rishabh Shukla, and R. S. Dhaka*, `Anomalous magnetic and spin glass behavior in Nb substituted LaCo(1-x)NbXO3’ Physical Review B, 97, 024430 (2018).

iv. Ravi Prakash, Rishabh Shukla, Priyanka, Anita Dhaka, and R. S. Dhaka*, ‘Tuning ferromagnetism and spin state in La(1-x)AXCoO3 (A = Sr, Ca) nanoparticles’ Journal of Alloys and Compounds, 764, 379, (2018).

v. Priyanka Nehla, Clemens Ulrich, and R. S. Dhaka*, `Investigation of the structural, electronic, transport and magnetic properties of Co2FeGa Heusler alloy nanoparticles’ Journal of Alloys and Compounds, 776, 379 (2019).

θ (ο)

π

π

π

Γ

π π

π π π π

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28 29

iii. Observation of strong magnetoelectric coupling and ferromagnetism at room temperature in Fe substituted ferroelectric BaZr0.05Ti0.95O3 thin films, Mukesh Kumari, Danilo G. Barrionuevo Diestra, Ram Katiyar, Jyoti Shah, R. K. Kotnala, and Ratnamala Chatterjee, Journal of Applied Physics 121, 034101 (2017).

iv. Non-volatile resistive switching in oxide ion conductor BiYO3 thin films, Divyanshu Bhatnagar, Ashwani Kumar, K. Prabahar, Manan Suri, A. Srinivas and Ratnamala Chatterjee, Applied Physics Letter 113, 162101 (2018).

v. Weak Antilocalization and Quantum Oscillations of Surface States in Topologically Nontrivial DyPdBi(110) Half Heusler alloy, Vishal Bhardwaj, Satyendra Prakash Pal, Lajos K. Varga, Monika Tomar, Vinay Gupta and Ratnamala Chatterjee, Scientific Reports 8, 9931 (2018).

BTS

Family of

Topological

Insulators

Ratnamala Chatterjee

PROFESSOR Department of Physics Magnetics & Advanced Ceramics Lab Telephone: +91 11 2659 1354 Office: MS 411 Lab: MS 308, MS 551 Email: ratnamalac@gmail.com; rmala@physics.iitd.ac.in Web: web.iitd.ac.in/~rmala

ResearchIn our lab, we work on materials that fall under the broad category of “smart magnetic multifunctional materials”. In this context, some of the materials that are of current interest and are being investigated using magnetic & ferroic tools are: (i) Topological insulators of BTS family- the ideal “spintronics” materials, (ii) Multiferroic thin-films for multiferroic tunnel junctions (MFTJ) & (iii) Multifunctional Huesler Alloys for spintronics

Recent works in this direction include: magneto-transport properties of BTS and doped BTS nano-flakes, growth of oriented single crystal like half-Heusler films and heterostructures of magnetic & ferroelectric oxides for MFTJ applications. In the area of MFTJs, we are interested in exploiting the magnetostriction of the magnetic layer to improve the 4-state non-volatile memory.

Representative Publicationsi. Magneto-transport and Kondo effect in cobalt doped Bi2Se3 topological insulators, Bushra Irfan and Ratnamala Chatterjee, Applied

Physics Letters 107, 173108 (2015).

ii. Experimental evidence of surface states in Bi2Te2+xSe topological insulators, Bushra Irfan and Ratnamala Chatterjee, AIP Advances 6, 095215 (2016). 30 31

iv. Synthesis of gold and silver nanoparticle S-ovalbumin protein conjugates by in situ conjugation process, D. Joshi, R.K. Soni, J. of Nanoparticle Res. 17, 210 (2015).

v. Laser synthesis of aluminium nanoparticles in biocompatible polymer solutions, R. Singh, R.K. Soni, Appl. Phys. A 116, 689-701 (2014).

Ravi Kant Soni

PROFESSOR Department of Physics Laser Processing of Nanomaterials Telephone: +91 11 2659 1304 Office: VI-201 Lab: VI-203 Email: ravisoni@physics.iitd.ac.in Web: web.iitd.ac.in/~ravisoni

ResearchI am interested in studying the effect of enhanced electric field near metal nanoparticle surface on molecules. We prepare metal nanopar-ticles and nanopatterned substrates by nanosecond and femtosecond laser ablation. We have developed laser based methods for shape controlled growth of anisotropic nanostructures and one-step bioconjugation of protein molecules for understanding charge transfer. We are also interested in developing nanomaterials for UV and deep UV plasmonics for refractive index sensing, metal enhanced fluorescence and molecular sensing using surface enhanced Raman spectroscopy.

Representative Publicationsi. Bromide (Br−) ion-mediated synthesis of anisotropic palladium nanocrystals by laser ablation, M.P. Navas, R.K. Soni, Appl. Surf. Sci.

390, 718-727 (2016).

ii. Laser-generated bimetallic Ag-Au and Ag-Cu core-shell nanoparticles for refractive index sensing, M.P. Navas, R.K. Soni, Plasmonics 10, 681-690 (2015).

iii. Synthesis of rattle-type Ag@ Al2O3 nanostructure by laser-induced heating of Ag and Al nanoparticles, R. Singh, R.K. Soni, Appl. Phys. A 121, 261-271 (2015).

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admt.201600101

iv. “A portable immunomagnetic cell capture system to accelerate culture diagnosis of bacterial infections” Singh Saurabh, Upadhyay-Mohita, Sharma Jyoti, Gupta Shalini, Vivekanandan Perumal, Elangovan Ravikrishnan. Analyst. 2016. DOI:10.1039/C6AN00291A

v. “Highly-sensitive detection of Salmonella typhi in clinical blood samples by magnetic nanoparticle-based enrichment and in-situ mea-surement of isothermal amplification of nucleic acids”. Kaur, A., Kapil, A., Elangovan, R., Jha, S. & Kalyanasundaram, D. PLOS ONE 13, e0194817, doi:10.1371/journal.pone.0194817 (2018).

Total internal reflection fluorescence imaging system: In house developed TIRF imaging system with high speed sCMOS camera for low light, high resolution imaging.

Ravikrishnan Elangovan

ASSOCIATE PROFESSOR Department of Biochemical Engg and Biotechnology Telephone: 011 26596243, 011 26596243 Office: Block I 328, IIT Delhi, Hauz Khas, New Delhi 110016 India E-mails: elangovan@dbeb.iitd.ac.in Web: http://web.iitd.ac.in/~elangovan/

ResearchAn undergraduate from IIT Delhi and PhD from University of Florence, Italy. Trained as biophysicist, now I am learning optics to visualize micro-nano-cosmos of biological world and applying them to develop invitro diagnostics technologies. My lab is broadly working in two themes

• Studying the mechanical nature of molecular motors

• Developing automated sample processing methods and optical detection methods for infectious diseases.

Representative Publicationsi. “Compact 3D printed module for fluorescence and label-free imaging using evanescent excitation” Vikas Pandey, Shalini Gupta and

Ravikrishnan Elangovan, Methods and applications in fluorescence, 2017.

ii. “Maximum limit to the number of myosin II motors participating in processive sliding of actin” Rastogi Khushboo, Puliyakodan Mo-hammed Shabeel, PandeyVikas, Nath Sunil and Elangovan Ravikrishnan. Scientific Reports. 2016. DOI: 10.1038/srep32043

iii. “Spot immunomagnetic enrichment device for rapid detection of pathogens in peripheral blood” Singh Saurabh, Pandey Vikas, Upad-hyay Mohita, Gupta Shalini, Vivekanandan Perumal, Elangovan Ravikrishnan. Advanced Materials Technologies. 2016. DOI: 10.1002/

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Applied Electric Field (E) (V/µm)

e- e-

Vertically aligned CNT bundle

20 µm

iv. Role of temperature in the radiation stability of yttria stabilized zirconia under swift heavy ion irradiation: A study from the perspec-tive of nuclear reactor applications, Parswajit Kalita, Santanu Ghosh, Gaël Sattonnay, Udai B. Singh, Vinita Grover, Rakesh Shuk-la, S. Amirthapandian, Ramcharan Meena, A. K. Tyagi, and Devesh K. Avasthi, Journal of Applied Physics 122, 025902 (2017); doi: 10.1063/1.4993177.

v. D. Sarker, S. Bhattacharya, R. D. Rodriguez, E. Sheremet, D. Kabiraj, D. K. Avasthi, D. R. T. Zahn, H. Schmidt, P. Srivastava and S. Ghosh, “Unraveling The Origin of Enhanced Field Emission from Irradiated FeCo-SiO2 Nanocomposites: A Combined Experimental and First-Principles Based Study” ACS materials and interfaces, 2016. DOI: 10.1021/acsami.5b07937

PROFESSOR Department of Physics NanoStech Laboratory Telephone: 91-11-26596546 Lab: MS434 Web: http://physics.iitd.ac.in/

ResearchWe are actively working in the following areas:

(i) Metal nanoparticles embedded in thin dielectric matrix for field emission, magnetic storage and Extraordinary Hall effect.

(ii) Growth of vertically aligned CNTs and their field emission characteristics

Representative Publicationsi. Evidence of local structural influence on the shape driven magnetic anisotropy in electronically excited Ni nanoparticles embedded

in SiO2 matrix, D. Sarker, S. Bhattacharya, H. Kumar, P. Srivastava and S. Ghosh, Scientific REPORTS | (2018) 8:1040, DOI:10.1038/s41598-017-18731-x

ii. Field emission properties of vertically aligned carbon nanotubes: aninterplay between types of hybridization, density of states and metal thickness, M. Sreekanth, S. Ghosh, S. R. Barman, P. Sadhukhan and P. Srivastava, Applied Physics A (2018) 124:528, https://doi.org/10.1007/s00339-018-1954-1

iii. Modeling of the in-situ nitrogen (N) doping of graphene-carbon nanotube (CNT) hybrids in a plasma medium and their field emission properties Aarti Tewari, Pankaj Srivastava, and Santanu Ghosh, Physics of Plasmas 25, 083520 (2018); doi: 10.1063/1.5048053

Santanu Ghosh

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ASSISTANT PROFESSOR Department of Physics Computational Materials Science Telephone: +91-11-2659 1359 Office: Block VI 415A Email: saswata@physics.iitd.ac.in Web: http://web.iitd.ac.in/~saswata

ResearchI work in inter-disciplinary areas of condensed matter physics with broad research interest in first principles based simulation of design-ing new materials preferably at nano-scale and understanding their properties using state-of-the-art density functional theory (DFT) and beyond methods. We predict properties of materials by integrating different level of theories and validate our prediction using the highest level of theoretical approaches beyond DFT framework or by comparing with experimental data (if available).

Representative Publicationsi. “Computational Design of Nanoclusters by Property-Based Genetic Algorithms: Tuning the Electronic Properties of (TiO2)n Clusters” S.

Bhattacharya, B. H. Sonin, C. J. Jumonville, L. M. Ghiringhelli, N. Marom Phys. Rev. B Rapid Commun. 91, 241115(R) (2015).

ii. “Exploring N-rich phases in LixNy clusters for hydrogen storage at nano-scale” A. Bhattacharya, S. Bhattacharya J. Phys. Chem. Lett., 2015, 6, 3726 (2015).

iii. “Unraveling the role of vacancies in the potentially promising thermoelectric clathrates Ba8ZnxGe46−x−y▢y” A. Bhattacharya, S. Bhattacharya Phys. Rev. B 94, 094305, (2016).

Saswata Bhattacharya

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K. Muduli, Peter Svedlindh, and Sujeet Chaudhary, Sci. Rep. Accepted (2018).

iii. Effect of in-situ electric field assisted growth on anti-phase boundaries in epitaxial Fe3O4 thin films on MgO Ankit Kumar, Erik Wet-terskog, Erik Lewin, Cheuk-Wai Tai, Serkan Akansel, Sajid Husain, Tomas Edvinsson, Rimantas Brucas, Sujeet Chaudhary and Peter Svedlindh Phys. Rev. Mat. 2 (2018) 054407.DOI:10.1103/PhysRevMaterials.2.054407

iv. Spin Pumping in Ion-beam Sputtered Co2FeAl/Mo Bilayers: Interfacial Gilbert Damping, Sajid Husain, Ankit Kumar, Vineet Barwal, Nila-mani Behera, Serkan Akansel, Peter Svedlindh and Sujeet Chaudhary, Phys. Rev. B 97 (2018) 064420.DOI:10.1103/PhysRevB.97.064420

v. Thickness-dependent enhancement of damping in Co2FeAl/b-Ta thin films, Serkan Akansel, Ankit Kumar, Nilamani Behera, Sajid Hu-sain, Rimantas Brucas, Sujeet Chaudhary, Peter Svedlindh, Phys. Rev. B 97 (2018) 134421.DOI:10.1103/PhysRevB.97.134421

vi. Temperature-dependent Gilbert damping of Co2FeAl thin films with different degree of atomic order, Ankit Kumar, Fan Pan, Sajid Hu-sain, Serkan Akansel, Rimantas Brucas, Lars Bergqvist, Sujeet Chaudhary, Peter Svedlindh, Phys. Rev. B 96 (2017) 224425.DOI:10.1103/PhysRevB.96.224425

Sujeet Chaudhary

PROFESSOR Department of Physics PVD Thin Films - Magnetism and Spintronics Telephone: +91 11 2659 1341 Office: MS 406 Lab: MS 401 Email: sujeetc@physics.iitd.ac.in Web: web.iitd.ac.in/~sujeetc

ResearchEmploying several variants of sputtering, we fabricate multilayers comprising of interface between ultrathin films of ferromagnetic (e.g., NiFe, CoFe2Al, CoFeB, Co, Fe, etc.) with either non—magnetic metals (e.g., Ta, W, Al, Mo, Cu, etc.) or antiferromagnetic alloys/oxides (e.g., FeMn, IrMn, NiMn, BeFeO3,etc.) or non-magnetic oxides (MgO, AlOx, bilayers), for number of interesting physical phenomenon involv-ing surface magnetism, viz. shifting of magnetization loops (Exchange bias), Spin polarized tunnelling (Tunnel Magnetoresistance), Spin pumping leading to magnetization (anti) damping, etc. These find applications in Information processing and new generation data storage technologies such as MRAMs, magnetization switching, logics, etc. We are also interested in growing nanomagnetic stacks having ultra low spin-damping, perpendicular magnetic anisotropy, complex magnetic structures e.g., Skyrmions, etc.

Research Publicationsi. Spin pumping in the Heusler alloy Co2FeAl/MoS2 heterostructure: Ferromagnetic resonance experiment and theory, Sajid Husain,

Abhishek Kumar, Prabhat Kumar, Ankit Kumar, Vineet Barwal, Nilamani Behera, Sudhanshu Choudhary, Peter Svedlindh, and Sujeet Chaudhary Phys. Rev. B - Rapid Commun. 98 (2018) 180404(R).DOI:10.1103/PhysRevB.98.180404

ii. Observation of Skyrmions at Room Temperature in Co2FeAl Heusler Alloy Ultrathin Film Heterostructures Sajid Husain, Naveen Siso-dia, Avinash Kumar Chaurasiya, Ankit Kumar, Jitendra Pal Singh, Brajesh S. Yadav, Serkan Akansel, Keun Hwa Chae, Anjan Barman, P.

40 41

Photograph depicting the selective light trapping (based on size and concentration variation of Ag nanoparticles) on textured silicon cells of 12.24 cm2 area without and with Ag nanoparticles deposited for 60sec, 120sec, 180sec (from left to right).

ASSOCIATE PROFESSOR Centre for Energy Studies Telephone: +91 11 2659 1255 Office: Block V, Room No. 350 B Lab: Block V, Room No. 350 B Email: vamsi@ces.iitd.ac.in Web: ces.iitd.ac.in/komarala.php

ResearchHis primary interest is in optical properties of nanostructured materials, and implementation of nanophotonics concepts for enhancing solar cell performance. He also interested in hetero-junction based silicon solar cells.

Representative Publications

i. Investigation of electrical parameters of amorphous-crystalline silicon heterojunction solar cells: Correlations between carrier dynam-ics and S-shape of current density-voltage graph, S Mudgal, S P Singh and V K Komarala, IEEE Journal of Photovoltaics 8 (2018) 909.

ii. Engineered optical properties of silver-aluminum alloy nanoparticles embedded in SiON matrix for maximizing light confinement in plasmonic silicon solar cells, P K Parasharand, V K Komarala, Scientific Reports7 (2017) 12520.

iii. Fabrication of perovskite films using an electrostatic assisted spray technique; the effect of electric field on morphology, crystallinity and solar cell performance, P S Chandrasekhar, N Kumar, S K Swami, V Dutta and V K Komarala, Nanoscale 8 (2016) 6792.

iv. Influence of surface plasmon resonances’ of silver nanoparticles on optical and electrical properties of textured silicon solar cell, S K Sardana, V S N Chava, E Thouti, N Chander, S Kumar and V K Komarala, Applied Physics Letters 104 (2014) 073903.

Vamsi Krishna Komarala

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mar, V. Solar Energy Materials and Solar Cells; 95, 215-218, 2011

(a) Schematic of GaN NRs fabrication process using Ni nanomasking and reactive ion etching: a top-down approach. (b) FESEM image of Ni NPs formed after rapid thermal annealing Ni film at 850 °C for 1 min. (c) FESEM image of vertically standing GaN NRs after selective RIE of SiO2 and GaN. Size distribu-tions of NPs and NRs are shown in (d,e), respectively. The NRs are about 1.2 μm in length and 210 nm (standard deviation of 35 nm) in diameter. Insets of (b,c) show magnified view of NPs and NRs, respectively.

EMERITUS PROFESSOR Centre for Applied research in Electronics (CARE) Telephone: +91 11 2659 6296 Office: Block III 217 Email: vkmr@iitd.ac.in

ResearchI am interested in understanding of electronic defects and interface states in silicon, III-V and II--VI semiconductors as well as organic semiconductors. I have also been involved in the development of MMIC technology based on GaAs MESFET and HEMT. I have studied car-rier transport in organic semiconductors. Currently I am involved in GaN and Ga2O3 nanowires, as also photovoltaics technology. I am also member or chair for several committees of DST, MNRE, DIT and other agencies.

Representative Publicationsi. Effect of ammonification temperature on the formation of coaxial GaN/Ga2O3 nanowires; Mukesh Kumar, George Sarau, Martin

Heilmann, Silke Christiansen, Vikram Kumar and R Singh, J Phys D: Appl Phys, 50(3), 05302, 2017

ii. Barrier inhomogeneities limited current and 1/f noise transport in GaN based nanoscale Schottky barrier diodes; Ashutosh Kumar, Martin Heilmann, Michael Latzel, Raman Kapoor, Intu Sharma, Manuela Goebelt, Silke Christiansen, Vikram Kumar, and Rajendra Singh; Nature Scientific Reports 6, 27553, 2016.

iii. Designing variable height carbon nanotube bundle for enhanced electron field emission; Mamta Khaneja, Santanu Ghosh, P.K. Chaudhury, V. D. Vankar , Vikram Kumar; Physica E 69, 17-176 2015

iv. Fabrication of silicon nanowire arrays based solar cell with improved performance; D Kumar, S K Srivastava, P.K Singh, M Husain, Ku-

Vikram Kumar

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Applications of Nanoscale Systems

47

iii. “Series Resistance Reduction in Stacked Nanowire FETs for 7-nm CMOS Technology”, Anil K. Bansal, Ishita Jain, Terene B. Hook, and Abhisek Dixit, Journal of Electron Device Society 4 (5), pp. 262-272, 2016.

iv. “Nanowire FET design for 7-nm SOI-CMOS technology”, Ishita Jain, Anil K. Bansal, Terence B. Hook, and Abhisek Dixit, IEEE SOI-3D-Subthreshold Microelectronics Technology Unified Conference (S3S), USA, 2015.

v. “Ab initio study of metal grain orientation-dependent work function and its impact on FinFET variability”, S. Agarwal, R. K. Pandey, J. B. Johnson, Abhisek Dixit, M. Bajaj, Stephen S. Furkay, Phil J. Oldiges, KVRM Murali, IEEE Transactions on Electron Devices 60 (9), pp. 2728-2733, 2013.

Fig. 1: TEM image of a gate-all-around nanorod device with sub-10 nm dimensions. The gate stack wrapping the nanorod from all sides can be clearly seen. The devices were fabricated by collaborating industry.

ASSISTANT PROFESSOR Department of Electrical Engineering Telephone: (91)-11-2659-1156 Device & wafer-level characterization Lab, Block II/401-A Office: Block II, Room 402-D, IIT Delhi, Hauz Khas, New Delhi 110016 India E-mails: adixit@ee.iitd.ac.in Web: http://web.iitd.ac.in/~adixit/

ResearchUltra-high transistor density in logic and memory applications has enabled realization of high-end, multi-billion transistor chips. Such high layout densities have been achieved by aggressively scaling the transistor dimensions, primarily so in the case of the gate length. However, it is critical to control short-channel effects for low static power, hence industry moved from planar transistors to fin type devices. Currently, production nodes have gate lengths in the range of 15-20 nm, and fins or wires down to 5 nm width or diameter are required to achieve the power-performance matric. At such nano-scale dimensions, electronic properties of materials, such as bandgap and carrier mobility in silicon, are very different from their bulk properties. In the device and wafer level characterization lab, we are focused on modeling and characterization of Si and alternate material devices at such advanced technology nodes, namely 14 to 7 nm CMOS.

Representative Publicationsi. “Comparison of Heat Outflow in Dense Sub-14nm Contemporary NFETs: Bulk/SOI, Inserted-Oxide FinFET and Nanowire FET”, Ishita

Jain, Anshul Gupta, Terence B. Hook, and Abhisek Dixit, in 3rd International Conference on Emerging Electronics, 2016, IIT Bombay, India.

ii. “A GIDL Perspective in 14-nm bulk & SOI MuGFETs”, Anil K. Bansal, Terence B. Hook, Naoto Horiguchi, Thomas Chiarella, Praveen Raghavan, and Abhisek Dixit, in 47th IEEE Semiconductor Interface Specialists Conference, USA.

Abhisek Dixit

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PA in 28nm CMOS with Device Design for Optimized Performance and ESD Robustness,” IEEE Transactions on Electron Devices, vol. 62, no. 10, pp. 3176-3183, Oct. 2015.

v. Ankur Gupta et al., Input Output I/O circuit supporting multiple I/O logic level swings. U. S. patent, issued on May, 2012.ASSISTANT PROFESSOR Centre for Applied Research in Electronics RF Microelectronics, CMOS Circuit Design Telephone: +91-11-2659-6069 E-mail: ankurgupta@care.iitd.ac.in web: http://care.iitd.ac.in/People/Faculty/AnkurG.htm

ResearchMy research focus is to improve radio-frequency (RF) behaviour of various electronic devices such as MOSFET, HEMT etc. We developed multiple device optimization strategy based on various device parameters. We are looking at novel nano-materials to further improve the RF performance of these devices. We also develop complete circuits and systems using these improved devices which involve analog/mixed-signal circuit design as well as their hardware implementation.

Representative Publicationsi. Ankur Gupta, Mayank Shrivastava, Maryam Shojaei Baghini, Dinesh Kumar Sharma, A.N. Chandorkar, Harald Gossner and V. Ramgopal Rao,

“Drain extended MOS device design for integrated RF PA in 28nm CMOS with optimized FoM and ESD robustness”, in IEEE International Electron Device Meeting (IEDM), Dec. 2014. pp. 3.5.1-3.5.4.

ii. Ankur Gupta, Mayank Shrivastava, Maryam Shojaei Baghini, Dinesh Kumar Sharma, Harald Gossner and V. Ramgopal Rao, “On the Improved High-Frequency Linearity of Drain Extended MOS Devices,” IEEE Microwave and Wireless Components Letters, Dec 2016.

iii. Ankur Gupta, Mayank Shrivastava, Maryam Shojaei Baghini, Dinesh Kumar Sharma, Harald Gossner and V. Ramgopal Rao, “High Voltage MOS Device Design for Improved Static and RF Performance,” IEEE Transactions on Electron Devices, vol. 62, no. 10, pp. 3168-3175, Oct. 2015.

iv. Ankur Gupta, Mayank Shrivastava, Maryam Shojaei Baghini, A. N. Chandorkar, Harald Gossner and V. Ramgopal Rao, “A Fully Integrated RF

Ankur Gupta

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085202, 2014.

v. A. Dhawan, Y. Du, H. Wang, D. Leonard, V. Misra, M. Ozturk, M. Gerhold, and T. Vo-Dinh, “Hybrid Top-down and Bottom-up Fabrication Approach for Wafer-scale Plasmonic Nano-Platforms,” Small, 7(6), 727–731, 2011.

Anuj Dhawan

ASSOCIATE PROFESSOR Electrical Engineering Department Nanophotonics and Plasmonics Telephone: +91 9810087814 Office: 413-D, Block II, IIT Delhi Email: adhawan@ee.iitd.ac.in Web : http://web.iitd.ac.in/~adhawan/

ResearchI and my research group are interested in designing and developing sensitive optical sensors for detecting gases as well as chemical and biological agents. My research group primarily works on the modeling and development of novel nanophotonic and plasmonic sensors for detecting biological molecules, gases, and chemical agents. Some of the sensors being designed and developed in my research group are based on phenomena such as surface plasmon resonance and surface enhanced Raman scattering. My research group is also interested in developing novel nanofabrication technologies to fabricate nano-scale materials.

Representative Publicationsi. Yashna Sharma and Anuj Dhawan, “Plasmonic nano-fingers inside nanowires as SERS substrates,” Optics letters 41 (9), 2085-2088,

2016.

ii. Anuj Dhawan, Hsin-Neng Wang, Yan Du, Dale Batchelor, Donovan N. Leonard, Veena Misra and Tuan Vo-Dinh*, “Molecular Sentinel on Chip for SERS-Based Biosensing,” Physical Chemistry Chemical Physics, 15, 6008-6015, 2013.

iii. Rahul Trivedi, Yashna Sharma, Anuj Dhawan, “Plane wave scattering from a plasmonic nanowire-film system with the inclusion of non-local effects,” Optics Express, 23 (20), 26062-26079, 2015.

iv. Yashna Sharma and Anuj Dhawan, “SERS substrates with gap-controlled enhancements and resonances,” Nanotechnology, 25,

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iv. D. Gupta, M. Jassal, A. K. Agrawal, Electrospinning of poly(vinyl alcohol) based Boger fluids to understand the role of elasticity on morphology of nanofibers, Ind. Eng. Chem. Res. (2015), 54, 1547-1554.

v. K. Panwar, M. Jassal, A. K. Agrawal, In situ synthesis of Ag-SiO2 Janus particles with epoxy functionality for textile applications, Par-ticuology (2015), 19, 107-112.

Ashwini K. Agrawal

PROFESSOR Department of Textile Technology Smart materials and innovative textile applications Telephone: +91 11 2659 1415 Office: TX 206 Lab: SMITA Research Lab, Dept. of Textile Technology Email: ashwini@smita-iitd.com, ashwini@textile.iitd.ac.in Web: www.smita-iitd.com

ResearchWe are working on developing novel intelligent, smart and functional materials for textile applications using various nanomaterials. The research group is involved in modification/functionalization of polymeric/textile substrates using atmospheric pressure plasma or by incor-porating nanomaterials in the form of nanocomposites or nanofinishes. Nanomaterials, such as ZnO nanorods have been used to fabricate reinforced micro and nanofibers. Various nanomaterials such as silver, TiO2 nanoparticles and nanoemulsions have been used to impart different activities such as antimicrobial, self-cleaning and hydrophobicity on the textile surface. Besides, the research group is also active in the area of synthesis of nanomaterials of different size and shape such as nanoparticles, nanorods, nanobelts and nanowires.

Representative Publicationsi. D. Gupta, M. Jassal, A. K. Agrawal, Electrospinning behavior of poly(vinyl alcohol) in DMSO-water binary solvent mixtures, RSC Adv.

(2016), 6, 102947-102955.

ii. R. Nain, D. Singh, M. Jassal, A. K. Agrawal, Zinc oxide nanorod assisted rapid single-step process for conversion of electrospun poly(acrylonitrile) nanofibers to carbon nanofibers with high graphitic content, Nanoscale (2016), 8, 4360-4372.

iii. P. Panda, M. Jassal, A. K. Agrawal, In situ atmospheric pressure plasma treatment of cotton with monocarboxylic acids to impart crease resistant functionality, Cellulose (2016), 23, 993-1002.

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ASSISTANT PROFESSOR

Electrical Engineering, MEMS and Microsensors

Office: Bharti Building, #313

Phone: 91-11-26596074

Email: bmitra@iitd.ac.in

Research

My research group works on a diverse group of projects related to MEMS and microfabrication. We are currently working on Piezoelectric energy harvesters, G-switches, Bistable actuators and switches and ISFET’s for chemical sensing. Additionally, I am interested in the scaling of microplasmas and their applications particularly to chemical sensing.

Representative Publicationsi. B. Mitra and Y.B. Gianchandani, The detection of chemical vapors in air using optical emission spectroscopy of pulsed microdischarges

from two and three electrode microstructures IEEE Sensors Journal, vol 8 (8), pp. 1445- 1454, Aug 2008

ii. B. Mitra, B. Levey and Y.B. Gianchandani, Hybrid Arc/Glow Microdischarges at Atmospheric Pressure and Their Use in Portable Sys-tems for Liquid and Gas Sensing, IEEE Transactions on Plasma Science, vol 36 (4), pp. 1913-1924, Aug. 2008

Bhaskar Mitra

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ings of the National Academy of Sciences112 (33), 10310-10315 (2015).

iii. Debanjan Bhowmik, Mark Nowakowski, Long You, OukJae Lee, David Keating, Mark Wong, Jeffrey Bokor and Sayeef Salahud-din. Deterministic domain wall motion orthogonal to current flow due to spin orbit torque. Scientific Reports5, 11823 (2015).

Debanjan Bhowmik

ASSISTANT PROFESSOR Electrical Engineering Indian Institute of Technology delhi. Spintronics Telephone: +91 11 2659 1043 Office: Block II- 413B Email: debanjan@ee.iitd.ac.in

ResearchSpintronics has rapidly emerged as a highly pursued research area in solid-state physics and devices owing to its potential application in low power memory and logic as well as the rich physics associated with it. Traditionally in spintronics, spin transfer torque in magnetic tunnel junctions and spin valves has been used to manipulate ferromagnets. Spin orbit torque has recently emerged as an alternative mechanism for manipulating ferromagnets, which offers advantages of lower energy consumption, simpler device structure, etc. In my doctoral thesis, I have shown various applications of spin orbit torque like low power memory and logic, and I have also explored fundamental physics of domain wall motion driven by spin orbit torque. As a faculty at IITD, I want to continue working on spin orbit torque and other aspects of spintronics keeping low power computing applications in mind, particularly non Boolean computing. I am also interested in studying topo-logical effects in magnetic nanostructures like skyrmion formation and motion.

Research Publicationsi. Debanjan Bhowmik*, Long You*, Sayeef Salahuddin. Nanomagnetic Logic without a magnetic field. Nature Nanotechnology9, 59-63

(2014).

ii. Long You, OukJae Lee, Debanjan Bhowmik, Dominic Labanowski, Jeongmin Hong, Jeffrey Bokor and Sayeef Salahuddin. Switching of perpendicularly polarized nanomagnets with spin orbit torque without an external field by engineering a tilted anisotropy. Proceed-

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iv. Plasmonic excitation of organic double heterostructure solar cells, JK Mapel, M Singh, MA Baldo, K Celebi, Appl. Phys. Lett., 90, 121102 (2007)

v. Device scaling physics and channel velocities in AIGaN/GaN HFETs: velocities and effective gate length, Y.-R Wu, M. Singh, J. Singh, IEEE Tran. Electron. Devices, 53(4), 588-593 (2006).

Madhusudan Singh

ASSOCIATE PROFESSOR Department of Electrical Engineering Flexible and printable devices and sensors Telephone: +91 11 2659 1063 Office: III.338 Lab: II.339/FMDL Email: msingh@ee.iitd.ac.in Web: web.iitd.ac.in/~msingh

ResearchI am interested in developing a greater understanding of solution-processed nanomaterials for low cost fabrication of solar cells, LEDs, sensors, photodetectors, TFTs, etc. We develop methods of depositing functional thin films with nanoscale uniformity from solution-based precursors while exploiting and tuning material chemistry and surface interactions to reduce the thermal budget. We are also carrying out studies of nanoscale transport in disordered materials like organic and inorganic semiconductors to develop better models relevant for device designers for scaled devices. We use both bottom up and top down fabrication methods to produce various devices on mechanically flexible substrates to develop new functionalities not possible with conventional microelectronic fabrication methods.

Representative Publicationsi. Recent developments and directions in printed nanomaterials, H. W. Choi, T. Zhou, M. Singh, G. E. Jabbour, Nanoscale 7(8), 3338-3355

(2015)

ii. Ferroelectric random access memory based on one-transistor–one-capacitor structure for flexible electronics, D Mao, I Mejia, AL Salas-Villasenor, M Singh, H Stiegler, BE Gnade, MA Quevedo-Lopez, Organic Electronics, 14(2), 505-510 (2013)

iii. Spin and device engineering for blue organic light emitting devices, M Segal, C Mulder, K Celebi, M Singh, K Rivoire, S Difley, T Van Voorhis, MA Baldo, Proc. SPIE, 6999, 699912 (2008)

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iv. M. Suri, and V. Parmar, “Exploiting Intrinsic Variability of Filamentary Resistive Memory for Extreme Learning Machine Architectures”, IEEE Transactions on Nanotechnology, Vol. 14, no. 6, pp. 963-968, Nov. (2015).

v. A. Kumar, M. Sarkar, and M. Suri, “Hybrid CMOS-OxRAM Image Sensor for Overexposure Control”, IEEE International Memory Work-shop (IMW), May, (2016).

vi. M. Suri, V. Parmar, G. Sassine and F. Alibart, “OXRAM based ELM architecture for Multi-Class Classification Applications”, IEEE Interna-tional Joint Conference on Neural Networks, IJCNN, (2015).

Figs. From publication [6]

Manan Suri

ASSISTANT PROFESSOR Department of Electrical Engineering Nanoelectronics Telephone: +91 11 2659 1146 Office: 115, Block -2 Email: manansuri@ee.iitd.ac.in Web: web.iitd.ac.in/~manansuri

ResearchI am interested in building low-power next generation non-volatile memory nanodevices. In our on-going research we investigate different families of emerging resistive memory technology such as OxRAM, PCM, CBRAM and STT-MRAM. We are building a diverse application ecosystem around such nanodevices. We use them for applications beyond conventional storage. We are among the few first and leading groups in the world to exploit NVM nanodevices for machine-learning, neuromorphic computing, and imaging applications. In our group we look at all stages from material stacks, device fabrication, characterization, Nano architectures to final end application.

Representative Publicationsi. M. Suri “Advances in Neuromorphic Hardware Exploiting Emerging Nanoscale Devices”, Springer Series in Cognitive Systems Mono-

graphs, Vol 31, 210, 2017.

ii. S. Sahay, M. Suri, A. Kumar, and V. Parmar, “OxRAM RNG Circuits Exploiting Multiple Undesirable Nanoscale Phenomena”, IEEE Trans-actions on Nanotechnology, Vol. PP, no. 99, pp. 37:1-37:14, Jan (2017).

iii. M. Suri, “Unconventional Computing with Emerging RRAM Nanodevices”, IEEE International Conference on Nanotechnology (NANO), August, (2016).

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polyamide fibers, Compos. Sci. Technol. (2015), 120, 58-65.

v. S. Sirohi, D. Singh, R. Nain, D. Parida, A. K. Agrawal, M. Jassal, Electrospun composite nanofibres of PVA loaded with nanoencapsu-lated n-octadecane, RSC Adv. (2015), 5, 34377–34382.

PROFESSOR Department of Textile Technology Smart materials and innovative textile applications Telephone: +91 11 2659 1426 Office: TX 216 Lab: SMITA Research Lab, Dept. of Textile Technology Email: manjeet@smita-iitd.com, manjeet@textile.iitd.ac.in Web: www.smita-iitd.com

ResearchThe group is engaged in the synthesis of isotropic and anisotropic nanostructures based on silver, TiO2, ZnO, MoO3 as well as Janus particles. The application of these nanostructures for functional finishing, coating of textile/polymeric surfaces has been demonstrated. Understand-ing the role of aspect ratio of nanostructures in governing the physical and mechanical properties of polymer composite fibres has also been the focus of our research. The fundamental concepts of electrospinning to obtain uniform nanofibres of desired morphology for applica-tions ranging from tissue engineering to filtration have also been investigated.

Representative Publicationsi. K. Panwar, M. Jassal, A. K. Agrawal, TiO2–SiO2 Janus particles with highly enhanced photocatalytic activity, RSC Adv. (2016), 6, 92754-

92764.

ii. N. Goyal, D. Rastogi, M. Jassal, A. K. Agrawal, Chitosan as a potential stabilizing agent for titania nanoparticle dispersions for prepa-ration of multifunctional cotton fabric, Carbohydr. Polym. (2016), 154, 167-175.

iii. K. Panwar, M. Jassal, A. K. Agrawal, TiO2-SiO2 Janus particles treated cotton fabric for thermal regulation, Surf. Coat. Technol., (2017), 309, 897-903.

iv. R. Nain, K. Yadav, M. Jassal, A. K. Agrawal, Aligned ZnO nanorods as effective reinforcing material for obtaining high performance

Manjeet Jassal

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induced friction at the nanoscale. Physical Review Letters, 118(7), 076103 (2017).

iv. Gosvami N. N., & O’Shea S. J., Nanoscale trapping and squeeze-out of confined alkane monolayers. Langmuir, 31(47), 12960-12967 (2015).

v. Gosvami N. N., Bares J. A., Mangolini F., Konicek A. R., Yablon D. G., & Carpick R. W., Mechanisms of antiwear tribofilm growth re-vealed in situ by single-asperity sliding contacts. Science, 348(6230), 102-106 (2015).

vi. Nalam P. C., Gosvami N. N., Caporizzo M. A., Composto R. J., & Carpick R. W., Nano-rheology of hydrogels using direct drive force modulation atomic force microscopy. Soft Matter, 11(41), 8165-8178 (2015).

vii. Lessel M., Loskill, P. Hausen, F., Gosvami N. N., Bennewitz R., & Jacobs K., Impact of Van der Waals interactions on single-asperity fric-tion. Physical Review Letters, 111(3), 035502 (2013).

Nitya Nand Gosvami

ASSISTANT PROFESSOR Department of Material Science and Engineering Nanomechanics and Nanotribology of Materials Telephone: +011 2659 6414 Office: III-235 Lab: IV-347 Email: ngosvami@am.iitd.ac.in Web: http://mse.iitd.ac.in/N-NGosvami/

ResearchMy research is focused on investigation of mechanical and tribological properties of materials in nanoscale contacts. Using novel atomic force microscopy based methods, my group is investigating molecular level force interactions at the liquid-solid interfaces which are rel-evant for understanding adhesion, friction, lubrication and wear at the single-asperity level. Most recently, I am exploring interactions of industrial lubricant additives with the surfaces of lightweight alloys for automotive applications which will help understand molecular level functionality of such additives. The figure below shows in situ imaging of growth of a tribochemical film derived from zinc dialkyldithio-phosphate (ZDDP), an industrial antiwear additive, in a nanoscale single-asperity sliding contact. The study demonstrates that the growth of such films is governed by the contact stresses and temperature which protects the sliding components of automotive engines against wear.

Representative Publicationsi. Khare, H. S., N. N. Gosvami, et al. (2018). “Nanotribological Printing: A Nanoscale Additive Manufacturing Method.” Nano Letters

18(11): 6756-6763.

ii. Gosvami, N. N., J. Ma, et al. (2018). “An in situ method for simultaneous friction measurements and imaging of the interfacial tribo-chemical film growth in lubricated contacts.” Tribology Letters 66 (4): 154.

iii. Tian K., Gosvami N. N., Goldsby D. L., Liu Y., Szlufarska I., & Carpick R. W., Load and time dependence of interfacial chemical bond-66 67

iii. Sushil Kumar, Saakshi Dhanekar, Pushpapraj Singh, “Molybdenum Based RF MEMS Switch for Harsh Environment Applications”, IC-MAT, 18-23 Jun 2017, Singapore. (Accepted)

iv. Pushpapraj Singh, Geng-Li Chua, Jayaraman Karthik Gopal, Anh Tuan Do and Tony Tae-Hyoung Kim, “Anchor-free NEMS Non-volatile Memory Cell for Harsh Environment Data Storage”, Journal of Micromechanics and Microelectronics, 24, pp. 115007, 2014.

v. Chua Geng Li, Pushpapraj Singh, Bo Woon Soon, Ying Shun Liang, Kim Tae Hyoung, Navab Singh “Molecular adhesion controlled mi-croelectromechanical memory device for harsh environment data storage”, Applied Physics Letters, 105, 113503, pp. 113503 (2014).

Mems-based pressure sensor

Pressure sensor array

Wireless power/data transmission module band

ASSISTANT PROFESSOR Centre for Applied Research in Electronics, Telephone: +91 11 2659 1130 Email: prsingh@care.iitd.ac.in Web: http://care.iitd.ac.in/People/Faculty/Pushparaj.htm

ResearchI am interested in developing MEMS/NEMS sensor system for recording important physical quantities for various applications such as environmental monitoring, biomedical and harsh environments. The deformation of the MEMS actuators is recorded via piezoresistive, capacitive, magnetostrictive and piezoelectric principles. Nano-dimension structures are recently emerged due to their quantum physics phenomenon’s and it has potential to significantly improve the measurement limits of conventional macro/micro scale sensing materials. These nano-dimension structures can be integrated with the MEMS structures to sense various physical quantities such as pressure, force, air flow, temperature, humidity etc. Enormous application areas can be targeted after developing these tiny sensors and then integrating many sensors onto a small scale chip.

Representative Publicationsi. Qingyun Xie, Nan Wang, Chengliang Sun, Andrew B. Randles, Pushpapraj Singh, Xiaolin Zhang, and Yuandong Gu, “Effectiveness of

Oxide Trench Array as a Passive Temperature Compensation Structure in AlN-on-Silicon Micromechanical Resonators” Applied Phys-ics Letters, 2016 Appl. Phys. Lett. 110, 083501 (2017); doi: http://dx.doi.org/10.1063/1.4976808.

ii. Vaibhav Rana, Kshitij Saxena, Saakshi Dhanekar, Pushpapraj Singh, “ Robust Piezoresistive Cantilever MEMS Switch for Extremely High Air/Gas Flow Sensing ” ICMAT, 18-23 Jun 2017, Singapore. (Accepted)

Pushpapraj Singh

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iv. Goswami, A., Aravindan, S., Rao, P. V. and Yoshino, M. (2016) Structured Surfaces for Generation of Negative Index of Refraction, Criti-cal Reviews in Solid state Material Science, 41, pp. 367-385

v. Goswami, K Singh, S Aravindan, PV Rao, (2016) Optimizing FIB milling process parameters for silicon and its use in nanoreplication, Materials and Manufacturing Processes, 1-7, 2016 DOI: 10.1080/10426914.2016.1257127

Nano structure Array of structures machined by FIB

PROFESSOR Department of Mechanical Engineering Telephone: +91 11 2659 6350 Office: WS124 Lab: III Block -154 Email: aravindan@mech.iitd.ac.in Web: http://mech.iitd.ac.in/content/aravindan-s

ResearchInterested in surface structure fabrication at micro and nano scale for inducing special functionality /artificial properties to substrates. Dual Beam (FIB-FESEM) System is used to generate the moulds, tools etc. Moulds and tools are integrated through multiple processes for the fabrication of large area structures. Surfaces having low reflectance (Optical functionality), induced hydrophobicity (Wettability) and increased cell adhesion properties (Bio function) are fabricated through these approaches. We work on a wide range of substrates which includes pure metals, alloys, composites, dielectrics, layered structures etc. Interested in study of conventional manufacturing processes like welding, casting, friction stir processing for the development of nano composites and ultra fine grained metals.

Representative Publicationsi. Rajkumar, K., & Aravindan, S. (2011). Tribological studies on microwave sintered copper-carbon nanotube composites. Wear, 270(9-

10), 613-621

ii. SN Bhavsar, S Aravindan, PV Rao (2015), Investigating material removal rate and surface roughness using multi-objective optimization for focused ion beam (FIB) micro-milling of cemented carbide, Precision Engineering,40, 131-138.

iii. Goswami, A., Aravindan, S. and Rao, P. V. (2016) Fabrication of Substrate Supported Bimetallic Nanoparticles and their Optical Char-acterization through Reflection Spectra, Superlattices and Microstructures, 91, pp. 252-258

S. Aravindan

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iv. Sinha, R. Khare, S.K., 2014. “Differential interactions of halophilic and non-halophilic proteases with nanoparticles”. Sustainable Chemical Processes, 2(1), 4.

v. Sinha, R., Karan, R., Sinha, A. Khare, S.K., 2011. Interaction and nanotoxic effect of ZnO and Ag nanoparticles on mesophilic and halo-philic bacterial cells. Bioresource Technology, 102(2), 1516-1520.

S. K. Khare

PROFESSOR Department of Chemistry Enzyme and Microbial Biochemistry Lab Lab: MS 801 E mail: skhare@rocketmail.com, skkhare@chemistry.iitd.ac.in Web: web.iitd.ac.in/~skkhare

ResearchProf. S.K. Khare has been actively involved in the wide research arena of nanotechnology by working on different aspects of interactions of nanomaterials with biological entities like microbes and enzymes. His candidature covers broad areas of research like nanobiocatalysis and nanotoxicity. He is actively engaged in developing efficient biocatalysts by immobilising industrially relevant enzymes on different nanoma-trices. His group has contributed significantly to understanding about the potential impact of nanoparticles on the environment and their interactions with biological systems. His research findings on the microbial system mediated mechanisms involved in nanotoxicity have led to many publications and book chapters to his credit.

Representative Publications

i. Sakla, R., Hemamalini, R., Pranaw, K. Khare, S.K., 2016. Effect of CeO2 nanoparticles on germination and total proteins pattern of Bras-sica nigra Seeds. Current Bionanotechnology, 2(2), 122-126.

ii. Sinha, R. Khare, S.K., 2015. Immobilization of halophilic Bacillus sp. EMB9 protease on functionalized silica nanoparticles and applica-tion in whey protein hydrolysis. Bioprocess and Biosystems Engineering, 38, 739-748.

iii. Sinha, R., Hemamalini, R. Khare, S.K., 2015. Proteomic investigations on interaction of silver nanoparticles with halophilic Bacillus sp. EMB9. Current Bionanotechnology, 1(2), 116-124.

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iv. Synthesis of α-MoO3 nano-flakes by dry oxidation of RF sputtered Mo thin films and their application in gas sensing, Priyanka Dwive-di, Saakshi Dhanekar, Samaresh Das, Semiconductor Science and Technology, 31, 115010 (2016) (https://doi.org/10.1088/0268-1242/31/11/115010).

v. Photo-induced electrochemical anodization of p-type silicon: Achievement and demonstration of long term surface stability, Saakshi Dhanekar, S. S. Islam, Harsh, Nanotechnology, 23, 235501 (2012) (10.1088/0957-4484/23/23/235501).

E. coli

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Selective ethanol sensing from nano-porous TiO2/PS heterostructure

Saakshi Dhanekar

INSPIRE FACULTY Centre for Applied Research in Electronics Telephone: +91-11- 2659 7331 Office: III-125 Email: sdhanekar@care.iitd.ac.in, saakshi.dhanekar@yahoo.com Web: http://care.iitd.ac.in/People/Faculty/Saakshi_Dhanekar.html

ResearchMy research area focuses on development of permanent solutions for societal issues. We implement wafer scalable processes for develop-ment of devices for detection of alcohol, diabetes and E. coli. bacteria. These devices comprises of nanomaterials which includes porous silicon, silicon nanowires, metal oxides (TiO2, MoO3, In2O3 etc.), 2D materials (MoS2) and in some cases heterostructures. The figures below show the microscope images of nanomaterials and devices developed and packaged. Few devices are being tested for detection of E. coli bacteria in water using two detection techniques: (1) Impedance Spectroscopy, (2) PL spectroscopy. The main motive of the research is to develop low cost, robust, handheld sensors to be used by the common man.

Representative Publicationsi. Morphology dependent PL quenching of multi-zone nanoporous silicon: Size variant silicon nanocrystallites on a single chip, Saakshi

Dhanekar, S. S. Islam, C. M. Julien, A. Mauger, Materials and Design, 101, 152 (2016) (http://dx.doi.org/10.1016/j.matdes.2016.03.161).

ii. Optical measurement of trace level water vapours using functionalized porous silicon: selectivity studies, Saakshi Dhanekar, Indu Sharma, S. S. Islam, RSC Advances, 6, 72371 (2016) (10.1039/C6RA12669C).

iii. TiO2 functionalized nano-porous silicon sensor: Low ppm alcohol vapors detection at room temperature, Priyanka Dwivedi, Saakshi Dhanekar, Samaresh Das, Sudhir Chandra, Journal of Materials Science and Technology (http://dx.doi.org/10.1016/j.jmst.2016.10.010).

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vi. “Dopant Induced Single Electron Tunneling within the Sub-bands of Single Silicon Nanowire Tri-gate Junctionless n-MOSFET” J. Phys. D: Appl. Phys. 50 365104 (2017).

vii. “High performance broadband photodetector based on MoS2 /porous silicon heterojunction”, Appl. Phys. Lett. 111, 191107 (2017). viii. “High sensitivity silicon single nanowire junctionless phototransistor” Appl. Phys. Lett.108, 063113 (2016).

High sensitivity Junction less Phototransistor MoS2/Si heterojunction high speed photodetector

Room Temperature Gas Sensor: Metal Oxide (TiO2 or MoO3) Nanostructures on Porous-Si

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Samaresh Das ASSISTANT PROFESSOR

Centre for Applied Research in Electronics Telephone: +91-11-26596036 Office: Block III-213 Lab: Microelectronics, CARE Email: samareshdas@care.iitd.ac.in Web: http://care.iitd.ac.in/People/Faculty/samaresh.html

ResearchDr. Samaresh Das is fascinated to carry research in Nanoelectronics and Optoelectronics. He has worked on quantum dot based memory devices, light emitters and photo-detectors on silicon substrate. He worked on the fabrication and characterization of Junction less Nanow-ire Trigate MOSFET. Currently, his group is working on highly efficient Photodetectors, Gas and Bio-Sensor and Quantum electronic devices. Research Students: Bhagaban, Veerendra, Priyanka, Wasi and Akshay

Representative Publicationsi. “High speed efficient ultraviolet photodetector based on 500 nm width multiple WO3 nanowires” Appl. Phys. Lett. 113, 101101 (2018)ii. “TiO2 /nano-Si Heterostructure based Device Prototype for E-nose Application”, IEEE Transactions on Electron Devices, vol. 65, No. 3,

pp.1127-1131 (2018).iii. “Development of Scalable Planar MEMS Technology for Low Power Operated Ethanol Sensor” Journal of Micromechanics and Micro-

engineering 28, 105020 (2018).iv. “MoO3 /nano–Si heterostructure based highly sensitive and acetone selective sensor prototype: a key to non-invasive detection of

diabetes”, Nanotechnology 29, 275503 (2018).v. “High-Speed Scalable Silicon-MoS2 P-N Heterojunction Photodetectors” Scientific Reports 7, 44243 (2017).

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iii. Suraj Kumar Tripathy, Sandeep Kumar Jha, R. Wahab. (2013) Microwave Assisted Hydrothermal Synthesis of Mesoporous SnO2 Nanoparticles for Ethanol Sensing and Degradation: A Sense and Shoot Strategy for Indoor Air Purification. Journal of Materials Science-Materials in Electronics. DOI 10.1007/s10854-013-1062-0 (IF 1.57, citation 10).

iv. Kwang-Su Kim, Sandeep K. Jha, C. J. Kang, Yong-Sang Kim. (2009) Catalytic Pd–TiO2 thin film based fire detector to operate at room temperature. Microelectronic Engineering, 86 (4-6), 1297-1299. (IF 1.2, citations 5)

Stabilization of biomolecules Device Fabrication & characterization Prototyping

Sandeep K. Jha

ASSISTANT PROFESSOR Centre for Biomedical Engineering Indian Institute of Technology Delhi & Lab-on-a-chip, Biosensors, microfluidics. Telephone: +91-8800883905, +91-11-2659-1119 Office: 393, Block-II, IIT Delhi E-mails: sandeepjhai@iitd.ac.in Web: www.sandeepjha.com

ResearchDr. Sandeep K. Jha is a joint faculty at the Centre for Biomedical Engineering (CBME), Indian Institute of Technology Delhi and All India Institute of Medical Sciences New Delhi. His areas of interest include Lab-on-a-chip and Microfluidics devices for biomedical applications; electrochemical and optical chemical and biosensors; bioinstrumentation & nanomaterials, conducting and synthetic polymers based im-mobilization techniques. Previously he served under various capacities at Banasthali University, India; Korea University, South Korea; KIIT University, Bhubaneswar, India; Myongji University, South Korea; Indian Institute of Technology, Mumbai, India and Bhabha Atomic Re-search Center, Mumbai, India. His teaching interests include diversified subjects such as biosensor technology, point-of-care medical diag-nostic devices; bionanotechnology; bio-electrochemistry; Industrial biotechnology & topics related to microfabrication and microfluidics.

Representative Publicationsi. Appan Roychoudhury, Suddhasatwa Basu, Sandeep K. Jha, (2016) Dopamine biosensor based on surface functionalized nanostruc-

tured nickel oxide platform. Biosensors & Bioelectronics. 84: 72–81 (IF 7.5)

ii. Suraj Kumar Tripathy, Amrita Mishra, Sandeep Kumar Jha, Rizwan Wahab, Abdulaziz A. Al-Khedhairy. (2013) Synthesis of Thermally Stable Monodispersed Au@SnO2 Core-shell Structure Nanoparticles by Sonochemical Technique for Detection and Degradation of Acetaldehyde. Analytical methods 5 (6), 1456-1462 (IF 1.8, citation 18)

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iii. P. Lund, Z. Bin, Li, Yong-Dan; S Yun, Suddhasatwa Basu et al., Standardized Procedures Important for Improving Single-Component Ceramic Fuel Cell Technology, ACS Energy Lett, 2 (12), 2752–275 (2017)

iv. Pankaj Kr. Tiwari, Xiangling Yue, John T. S. Irvine, Suddhasatwa Basu, La and Ca-Doped A-Site Deficient Strontium Titanates Anode for Electrolyte Supported Direct Methane Solid Oxide Fuel Cell, J. of Electrochem Soc, 164 (9) F1030-F1036 (2017)

v. Amandeep Jindal, Harikrishnan N., Suddhasatwa Basu, Direct Formic Acid PEM Fuel Cell with Electrospun Carbon Nitride Nanofibers as Cathode Catalyst, Fuel Cells, 17(3) 407–411 (2017) (highlighted in back cover)

vi. Amandeep Jindal, Suddhasatwa Basu, Neha Chauhan, Tomofumi Ukai, D. Sakthi Kumar, Samudyatha K. T., Application of electrospun CNx nanofibers as cathode in microfluidic fuel cell, J. Power Sources, 342, 165-174 (2017)

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ORR Cat: CNx-PAN Fibre

SOFC Anode: Ni exsoluted LSCTA-

Photo Anode: Hematite Dendrite

Suddhasatwa Basu, F.N.A.Sc.

PROFESSOR Department of Chemical Engineering Electrochemical Storage; Micro Fluidic Devices Telephone: +91 11 2659 1035 Office: II/386 Lab: Electrochemical & Fuel cell; Lab II/390; I/234 Email: sbasu@iitd.ac.in Web: web.iitd.ac.in/~sbasu

ResearchMy group consisting of nine Ph.D. students and five post-doctoral fellows and three Master students primarily working on development of nano-materials as electrochemical, photochemical and photo-electrochemical catalysts and catalyst supports and their application in elec-trochemical storage devices, sensor development. Under Nano Mission Project, micro glucose fuel cell and, DeITY sponsored NRF projects, microfluidic fuel cell based on CNx nano-fibre as cathode have been developed and demonstrated. We are also working on in-situ water splitting in micro reactor and use of hydrogen and oxygen in micro fuel cell and CO2 conversion to chemical fuel (artificial photosynthesis) through photochemical route assisted by water splitting. Another major thrust in our lab is to develop direct hydrocarbon proton exchange fuel cell and solid oxide fuel cell. For this purpose we are developing various co-doped perovskites material as anode and cathode, which provides both ionic and electronic conductivity and active towards redox reaction.

Research Publicationsi. Ayan Mukherjee, Sankalpita Chakrabarty, Wei-Nien Su, Suddhasatwa Basu, Nanostructured nickel ferrite embedded in reduced gra-

phene oxide for electrocatalytic hydrogen evolution reaction, Materials Today Energy, 8, 118-124 (2018)

ii. Sankalpita Chakrabarty, Ayan Mukherjee, Suddhasatwa Basu, RGO-MoS2 Supported NiCo2O4 Catalyst toward Solar Water Splitting and Dye Degradation, ACS Sustainable Chemistry & Engineering 6 (4), 5238-5247 (2018)

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iii. U. Sajesh Kumar and V. Ramgopal Rao, “A Novel TCAD based Thermal Extraction Approach for Nano-scale FinFETs”, IEEE Transactions on Electron Devices, DOI: 10.1109/TED.2017.2657626, Feb 2017

iv. Manoj Kandpal ; Vijay Palaparthy ; Nikhilendu Tiwary ; V. Ramgopal Rao, “Low cost, large area, flexible graphene nano-composite films for Energy Harvesting Applications”, IEEE Transactions on Nanotechnology, Volume: 16, DOI: 10.1109/TNANO.2017.2659383, Mar 2017

v. Sadhana Tiwari, Madhuri Vinchurkar, V. Ramgopal Rao, Gil Garnier “Zinc oxide nanorods functionalized paper for protein preconcen-tration in biodiagnostics”, Scientific Reports (Nature Publishing Group), doi:10.1038/srep43905, March 2017

A nano-mechanical relay with 20 nm air gap for CMOS power gating and sensing applications

Prof. V.Ramgopal Rao

Director Nanoelectronics Telephone: +91 11 26582020,26591701 Office: Director’s Office Email: rrao@iitd.ac.in Web: http://www.iitd.ac.in/admn/

Research My research interests focus on Nanoscale devices for electronics and sensor applications addressing the real world problems. My current projects include development of highly sensitive and selective nano-electro-mechanical-sensing platforms for healthcare, agriculture and environmental applications, use of bottom up approaches for solving the CMOS technology scaling issues and flexible electronics. Some of these projects involve complete system development integrating the sensors with electronics, power source and a sample preparation stage meeting the requirements of Internet of Things applications. Many of these projects are undertaken in close collaboration with industry, with commercialization as a target. Representative Publications

• Neena A. Gilda, Gayatri P.Vaidya, M. S. Baghini, V. Ramgopal Rao, "Multi-functional, CMOS compatible Nano-Electro-Mechanical Relays for Vapor Phase Explosive Detection", Accepted for publication, (IEEE/ASME) Journal of Microelectromechanical Systems (J-MEMS), 2017

• Sivaneswaran Sankar, U. Sajesh Kumar, Mayank Goel, Maryam Shojaei Baghini and V. Ramgopal Rao, "Considerations for Static Energy Reduction in Digital CMOS ICs using NEMS Power Gating", IEEE Transactions on Electron Devices, DOI: 10.1109/TED.2017.2656802, Feb 2017

• U. Sajesh Kumar and V. Ramgopal Rao, "A Novel TCAD based Thermal Extraction Approach for Nano-scale FinFETs", IEEE Transactions on Electron Devices, DOI: 10.1109/TED.2017.2657626, Feb 2017

• Manoj Kandpal ; Vijay Palaparthy ; Nikhilendu Tiwary ; V. Ramgopal Rao, “Low cost, large area, flexible graphene nano-composite films for Energy Harvesting Applications”, IEEE Transactions on Nanotechnology, Volume: 16, DOI: 10.1109/TNANO.2017.2659383, Mar 2017

• Sadhana Tiwari, Madhuri Vinchurkar, V. Ramgopal Rao, Gil Garnier "Zinc oxide nanorods functionalized paper for protein preconcentration in biodiagnostics", Scientific Reports (Nature Publishing Group), doi:10.1038/srep43905, March 2017

A nano-mechanical relay with 20 nm air gap for CMOS power gating and sensing applications

DIRECTOR Nanoelectronics Telephone: +91 11 26582020,26591701 Office: Director’s Office Email: rrao@iitd.ac.in Web: http://www.iitd.ac.in/admn/

Research My research interests focus on Nanoscale devices for electronics and sensor applications addressing the real world problems. My current projects include development of highly sensitive and selective nano-electro-mechanical-sensing platforms for healthcare, agriculture and environmental applications, use of bottom up approaches for solving the CMOS technology scaling issues and flexible electronics. Some of these projects involve complete system development integrating the sensors with electronics, power source and a sample preparation stage meeting the requirements of Internet of Things applications. Many of these projects are undertaken in close collaboration with industry, with commercialization as a target.

Representative Publications i. Neena A. Gilda, Gayatri P.Vaidya, M. S. Baghini, V. Ramgopal Rao, “Multi-functional, CMOS compatible Nano-Electro-Mechanical

Relays for Vapor Phase Explosive Detection”, Accepted for publication, (IEEE/ASME) Journal of Microelectromechanical Systems (J-MEMS), 2017

ii. Sivaneswaran Sankar, U. Sajesh Kumar, Mayank Goel, Maryam Shojaei Baghini and V. Ramgopal Rao, “Considerations for Static Energy Reduction in Digital CMOS ICs using NEMS Power Gating”, IEEE Transactions on Electron Devices, DOI: 10.1109/TED.2017.2656802, Feb 2017

V. Ramgopal Rao

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Chemistry of Nanoscale Systems

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iii. Sethi et al., Hydrotrope Induced Structural Modifications in CTAB/Butanol/Water/Isooctane Reverse Micellar System, Phys. Chem. Chem. Phys., 2017, 19, 22033-22048; Khanchandani et al Comparative Study of TiO2/CuS Core/Shell and Composite Nanostructures for Efficient Visible Light Photocatalysis ACS Sustainable Chem. Eng. 2016, 4, 1487−1499.

iv. Baruah et al, Development of cartridge for removal of Lanthanide ions from water.” Patent filed 2016 (Application Reference Number: FT/100/AKG/DCHEM/2016/1583)

v. Baruah et al, Microfluidic reactors for the morphology controlled synthesis and photocatalytic study of ZnO nanostructures J. Micro-mech. Microengg. 2017, 27, 035013.

PROFESSOR Solar Energy Conversion, Electrochemical Fuel Generation & Water Purification Department of Chemistry Solid State and Nanomaterial Research Lab Telephone: +91 11 2659 1511 Office: MS 709, Lab: 235, Block-6 Email: ashok@chemistry.iitd.ac.in Web: http://web.iitd.ac.in/~ashok/

Research Current research of our group is focused on 2D materials, metal oxides, metal chalcogenides and alloy nanostructures for photoelectro-chemical water splitting, photocatalytic organic pollutant (dye) degradation, photocatalytic fuel generation and water purification. Various transition metal based inorganic solids like based binary and ternary alloy nanostructures, metal oxides, carbide, nitride, sulphide and phos-phide nanostructures were rationally designed by our group for their electrocatalytic activity in water splitting and CO2 conversions. We are also working on the fabrication of microfluidic chip for surfactant-free synthesis of metal oxides nanostructures for online photocatalytic devices. Water purification cartridge development using novel nanoadsorbents is another area of research of our group.

Representative Publicationsi. Kumar et al, Design and Comparative Studies of Z-Scheme and Type II Based Heterostructures of NaNbO3/CuInS2/In2S3 for Efficient

Photoelectrochemical Applications, Inorg. Chem. DOI: 10.1021/acs.inorgchem.8b02264;Kumar et al, Dominant {100} Facet Selectiv-ity for Enhanced Photocatalytic Activity of NaNbO3 in NaNbO3 /CdS core/shell heterostructures, Catal. Sci. Tech., 2017, 7, 481-495.

ii. Ojha et al., Nanocatalysts for hydrogen evolution reactions, Phys. Chem. Chem. Phys., 2018,20,6777-6799;Ojha et al, Efficient Electro-catalytic Hydrogen Evolution from MoS2 functionalized Mo2N nanostructures, ACS Appl. Mater. Interfaces, 2017, 9 (23), 19455–19461.

Ashok K. Ganguli

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als and Interfaces, 7, 12539, 2015

iii. Multifunctional Core-Shell Polymer-Inorganic Hybrid Nanofibers Prepared via Block Copolymer Self-Assembly, S. Sanwaria, S. Singh, A. Horechyy, P. Formanek, M. Stamm, R. Srivastava, B. Nandan, RSC Advances, 5, 89861, 2015

iv. Crystallization Behaviour of Poly (ethylene oxide) Under Confinement in Electrospun Nanofibers of Polystyrene/Poly (ethylene oxide) Blends, P. Samanta, T. Velmayil, S. Singh, R. Srivastava, B. Nandan, C.-L. Liu and H.-L. Chen, Soft Matter, 12, 5110, 2016

ASSOCIATE PROFESSOR Self-Assembly in Polymers, Functional Nanofibers Department of Textile Technology Telephone: +91 11 2659 6679 Office: TX110-F

ResearchMy research group focusses on design and manipulation of one-dimensional nanostructures such as nanofibers using polymer self-assembly and electrospinning as fabrication tools. We have used these fabrication tools to fabricate functional and multifunctional one-dimensional nanomaterials. The below given figure shows polymer nanorods with helically assembled silver nanoparticles in the core ascertained us-ing TEM tomography. These novel nanostructures were obtained using the hierarchically self-assembled structures from block copolymer/nanoparticle mixtures. Furthermore, our research group also works on understanding the polymer properties confined in nanoshaped ma-terials. For example, we are currently investigating the crystallization of polymers confined in nanodomains formed either via self-assembly or electrospinning techniques.

Representative Publicationsi. Helical packing of Nanoparticles Confined in Cylindrical Domains of Self-Assembled Block Copolymer Structure, S. Sanwaria, A. Ho-

rechyy, D. Wolf, C.-Y. Chu, H.-L. Chen, P. Formanek, M. Stamm, R. Srivastava, B. Nandan, Angewandte Chemie International Edition, 53, 9090, 2014

ii. Hairy Core-Shell Polymer Nanoobjects from Self-assembled Block Copolymer Structures, B. Nandan, A. Horechyy, ACS Applied Materi-

Bhanu Nandan

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Stability and Finite Element Analysis. MOD. SIMUL. MATER. SCI. ENG. 22 055003, 2014.

ii. H. Annepu and J. Sarkar; Miniaturized Pattern Formation in Elastic Films cast on Sinusoidally Patterned Substrates. LANGMUIR, 30, 12278–12286, 2014

iii. 3. 3.T. Rao Kotni, J.Sarkar and R. Khanna; Kinetically engendered subspinodal length scales in spontaneous dewetting of thin liquid films. PHY. REV. E, RAPID COMM, 90, 020401(R), 2014.

iv. 4. T. Rao. Kotni, R. Khanna, J. Sarkar; Kinetics of sub-spinodal dewetting of thin films of thickness dependent viscosity, accepted in Journal of Physics: Condensed Matter, 2017

Top Panel: Left to right display progressively smaller wavelength features seen on soft film surfaces cast over patterned substrates created in lab with help of commercially available CDs or naturally available water lily leaf replicas. Length scales obtained are all less than 3h seen over planar substrates.

Middle Panel: The first figure shows a contactor substrate assembly that when connected to an external e-field leads to an uniform field across the film and engenders progressively miniaturized columnar surface patterns from left to right in higher rough-substrate films as found from non-linear simulations.

Bottom Panel: Non-linear simulations reveal satellite hole formation by deep-ening of satellite depressions between the rims of growing holes in liquid thin films undergoing dewetting with higher base mobility as opposed to the rising for normal films.

Jayati Sarkar

ASSOCIATE PROFESSOR Department of Chemical Engineering Telephone: +91 11 2659 1163 Email: jayati@chemical.iitd.ac.in, Web: http://web.iitd.ac.in/~jayati/

ResearchI am interested in studying instabilities at soft interfaces. Pattern formation through self organization method of elastic thin films, which involves reorganization of surface morphology due to application of an internal or external force field to attain minimum energy state, has been found to be an excellent cheaper alternative route compared to conventional lithographic techniques for meso/nano scale fabrications at such soft interfaces. The patterns formed are found to be short-waved and independent of the nature of interactions present. To impart enhanced functional properties it is essential to achieve smaller and smaller length scales. We have found that remarkably smaller length scales are achieved with contact proximity configuration of elastic films cast on patterned substrates than those obtained with films cast on flat substrates. When van der Waals contact interactions are present, the patterns are uniformly formed throughout the film but are not regularly ordered whereas both uniformity and order of patterns is attained with electrostatic interactions. Such patterns are very useful in various applications like micro fluidics, they are formed with great ease and can be morphologically tuned by tuning the externally applied electric field. We have also shown that miniaturization of patterns can also be achieved in thin wetting liquid films if the viscosity of the film is found to vary with the thickness.

Representative Publications i. H. Annepu , J. Sarkar and S. Basu, Pattern Formation in Soft Elastic Films Cast on Periodically Corrugated Surfaces– a Linear

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iii. Fatima Jalid, Tuhin Suvra Khan, Fasil Qayoom Mir, and M. Ali Haider, “Understanding Trends in Hydrodeoxygenation Reactivity of Metal and Bimetallic Alloy Catalysts from Ethanol Reaction on Stepped Surface”, Journal of Catalysis, 353, 265-273, 2017

iv. Tuhin S. Khan, Sonit Balyan, Sourabh Mishra, Kamal K. Pant and M. Ali Haider, “Mechanistic Insights into the Activity of Mo-Carbide Clusters for Methane Dehydrogenation and Carbon-Carbon Coupling Reactions to Form Ethylene in Methane Dehydroaromatization”, The Journal of Physical Chemistry C, 2018

v. Tuhin S. Khan, Sarwar Hussain, Uzma Anjum, M . Ali Haider, “In-silico Screening of Metal and Bimetallic Alloy Catalysts for SOFC Anode at High, Intermediate and Low Temperature Operations” Electrochimica Acta, 2018

ASSOCIATE PROFESSOR Department of chemical Engineering Renewable Energy and Chemicals Research Group Telephone: (91)-11-2659-1016 Room 312, Block I, IIT Delhi, Hauz Khas, New Delhi 110016 India E-mails: haider@iitd.ac.in Web: http://web.iitd.ac.in/~haider/

Research The Renewable Energy and Chemicals (REC) group is focused on the study of molecular heterogeneous catalysis to provide sustainable solu-tions for the demand of energy and chemicals. Whether it is required to convert biomass into fuels and chemicals, or to convert fuels into electrical energy, advancement in catalyst materials forms the core of development. The group is interested in an integrated approach in which material synthesis is guided by a molecular level understanding of the reaction. Both experiments and ab-intio level (DFT) theory are applied in solving a problem at hand. The group has recently developed a novel bio-milling synthesis method to fabricate layered perovskite structured materials to be used as the cathode in solid oxide fuel cells with high electrocatalytic activity (Figure a). In another successful ef-fort, facet dependent selectivity control for phenol hydrogenation was elucidated on defined Pd nanostructures (cubes, spheres, octahedral particles) of size ranging from 6 to 25 nm as shown in Figure (b).

Representative Publicationsi. Madhulika Gupta, Tuhin S. Khan, Shelaka Gupta, Md. Imteyaz Alam, Manish Agarwal, M. Ali Haider, “Non-bonding and bonding in-

teractions of biogenic impurities with the metal catalyst and the design of bimetallic alloys”, Journal of Catalysis 352, 542–556, 2017

ii. Md. Imteyaz Alam, Shelaka Gupta, Ashish Bohre, Ejaz Ahmad, Tuhin S. Khan, Basudeb Saha, M. Ali Haider, “Development of 6-amyl-α-pyrone as a potential biomass-derived platform molecule”, Green Chemistry, 2016 (cover illustration)

M. Ali Haider

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ii. Effect of Chemical Charging-discharging on Plasmonic Behavior of Silver Metal Nanoparticles Prepared using Citrate Stabilized CdSe Quantum Dots, P. P. Ingole*, M. Bhat, ChemPhysChem, 2016, 17, 3209 –3216.

iii. In-situ solid state synthesis of metal ion doped g-C3N4 for efficient photocatalytic and photoelectrocatalytic application under visible light, N. Bhandary,, A. P. Singh*, S. Kumar, P. P. Ingole*, A. K. Ganguli, S. Basu*, ChemSusChem, 2016, 9, 2816.

iv. Probing crystal structure and composition dependent absolute energy levels and electro-catalytic properties of silver indium sulfide nanostructures. P. Saji, A. Ganguli, M. Bhat, P. P. Ingole*, ChemPhysChem, 2016, 17, 1-10.

Pravin P. Ingole

ASSISTANT PROFESSOR Department of Chemistry Electrochemistry and Nanomaterials Telephone: +91 11 2659 7547 Office: MS 723 Lab: Block VI-234 Email: ppingole@chemistry.iitd.ac.in Web: http://chemistry.iitd.ac.in/faculty/ingole.html

ResearchOur research focuses on the electrochemical investigations on advanced functional materials for renewable energy harvesting and its stor-age so that the use of traditional fossil fuels can be minimized. The main goal of the research is to design and develop the nano-electrocat-alysts based on nanoparticles anchored to a suitable support. Metal nanoparticles and semiconductor quantum dots are being studied in this regard. Carbon based materials such as CNTs, graphene, and reduced graphene oxide as well as semiconductor oxdies such as TiO2, ZnO are used as a support material. Our group concentrates mainly on the following aspects,

(i) fabricating nano-electrocatalysts for the electrochemical conversion of organic pollutants such as CO2 into fuels and/or useful chemical feedstock, (ii) Electrochemical and spectro-electrochemical studies on the advanced functional materials in order to characterize and tune their electronic band structure, and (iii) developing photo-electrocatalysts based on semiconductor quantum dots for photovoltaic solar cell applications.

Representative Publicationsi. Rudimentary simple, single step fabrication of nano-flakes like AgCd alloy electro-catalyst for oxygen reduction reaction in alkaline

fuel cell, N. Bhandary, S. Basu, P. P. Ingole*, Electrochimica Acta, 2016, 212, 122-129.

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Energy and Electron Transfer Processes, A. Pal, S. Srivastava, P. Saini, S. Raina, P. Ingole, R. Gupta, S. Sapra, J. Phys. Chem. C 119, 22690 (2015).

iv. Simultaneous Type-I/Type-II Emission from CdSe/CdS/ZnSe Nano-Heterostructures, U. Soni, A. Pal, S. Singh, M. Mittal, S. Yadav, R. Elangovan, S. Sapra, ACS Nano 8, 113 (2014).

Sameer Sapra

PROFESSOR Nanomaterials Telephone: +91 11 2659 1561 Office: MS 631 Lab: MS 603 Email: sapra@chemistry.iitd.ac.in Web: web.iitd.ac.in/~sapra

ResearchI am interested in studying the changes that can be brought about in nanomaterials as a function of various synthesis parameters. We de-velop a number of new nano-heterostructures and study the basic principles governing their charge dynamics. The figure below shows such a system with Type-I and Type-II junctions both exhibiting fluorescence. Through the links on my webpage, you will also find a number of bio-applications being developed based on these materials. We are also interested in developing materials for photovoltaics and photoca-talysis including hydrogen evolution reactions. In recent times we have also been interested in perovskite nanomaterials for light emitting properties.

Representative Publicationsi. Solvent-free, mechanochemical syntheses of bulk trihalide perovskites and their nanoparticles, A. Jana, M. Mittal, A. Singla, S. Sapra,

Chem. Commun. (2017)., DOI: 10.1039/C7CC00666G

ii. Size of the Organic Cation Tunes the Band Gap of Colloidal Organolead Bromide Perovskite Nanocrystals, M. Mittal, A. Jana, S. Sarkar, P. Mahadevan, S. Sapra, J. Phys. Chem. Lett. 7, 3270 (2016).

iii. Probing the Mechanism of Fluorescence Quenching of QDs by Co(III)-Complexes: Size of QD and Nature of the Complex, Both Dictate

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iv. A. Jain, N. Chauhan, A. Malik and H. K Malik (2016) Sustainable biosynthesis of silver nanoparticles for sensing application using leaf extracts. Proceedings of Ist National conference on climate change adaptation and sustainable development, New Delhi, India

Figure 1. Development, characterisation and testing of PEG-Mentha oil nanoparticles (Kumar et al; 2014)

Figure 2. Development, characterisation and antimicrobial potential of Jc-AgNps (Chauhan et al., 2016a)

Anushree Malik

PROFESSOR Centre for Rural Development and Technology Applied Microbiology Lab (AML) Tel: +91-11-26591158; Fax: +91-11-26591121 Email: anushree@rdat.iitd.ac.in, anushree_malik@yahoo.com Web: http://web.iitd.ac.in/~anushree/

Research The current research utilizes technological skills for the development of sustainable green solutions. Recently, attempts have been made to develop botanical based nanoparticles for the effective control of indoor pests (housefly and mosquitoes) and food microbes. Nanoparticles of PEG-Mentha oil were prepared by melt-dispersion method (Figure 1). The developed nanoparticles were characterized using various ana-lytical (Zeta potential, DLS, FTIR, UV-vis) and microscopic techniques (SEM). The developed PEG-Mentha nanoparticles showed considerable mortality against housefly larvae in lab (100%) as well as simulated field condition after first week (93%) and 6th week (57%) of application (Kumar et al., 2014).

Research Publications i. N. Chauhan, A. K. Tyagi, P. Kumar and A. Malik (2016a) Antibacterial potential of Jatropha curcas synthesized silver nanoparticles

against food borne pathogens. Frontiers in Microbiology 7:1748. doi: 10.3389/fmicb.2016.01748 (IF: 4.16)

ii. N. Chauhan, A. K. Tyagi and A. Malik (2016b) Anti-Yeast Activity of Jatropha curcas synthesised silver nanoparticles ISERD, Proceedings of 52nd INTERNATIONAL CONFERENCE” held at New hotel, Athens, Greece, pp. 11.

iii. P. Kumar, S. Mishra, A. Malik, and S. Satya (2014) Preparation and characterization of PEG-Mentha oil nanoparticles for housefly con-trol. Colloids and Surfaces B: Biointerfaces 116, 707-713 (IF: 4.26).

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iv. Jain A, Yadav BK and Chugh A (2014) Marine antimicrobial peptide Tachyplesin as an efficient nanocarrier for macromolecule delivery in plant and mammalian cells. FEBS J 282(4): 732-45.

v. Jain A, Shah SG and Chugh A (2015) Cell Penetrating Peptides as efficient nanocarriers for delivery of antifungal compound natamycin for the treatment of fungal keratitis, Pharmaceutical Research 32(6):1920-30.

Figure1: Cellular translocation of natamycin-CPP complex in HCE cells as analysed by confocal microscopy.

ASSOCIATE PROFESSOR Kusuma School of Biological Sciences Telephone: +91 11 2659 7533 Office: AI 303 Lab: MS2 Email: achugh@bioschool.iitd.ac.in Web: http://bioschool.iitd.ac.in/lab-archana-chugh.html

ResearchResearch at our lab focuses at exploring the potential of cell penetrating peptides as effective nanocarriers for macromolecule delivery including therapeutic molecules. We are investigating the versatility of CPPs as cargo delivery vehicle, organelle targeting peptide, and ap-plication in peptide based therapeutics. One of the areas is ocular disease management by CPP-drug complex. Conjugation of an antifungal drug with CPP resulted into enhanced cell penetration as well as antifungal activity (Figure 1 and 2). We are in the process of developing nanoparticle based drug delivery systems for ocular disease management. Another area focuses on antimicrobial aspects of existing CPPs.

Representative Publicationsi. Nisha P and Chugh A (2017)Cell-penetrating and cargo-delivery ability of a spider toxin-derived peptide in mammalian cells. European

Journal of Pharmaceutics and Biopharmaceutics doi: 10.1016/j.ejpb.2017.01.012. .

ii. Nisha P, Deepthi B and Chugh A (2017) CyLoP-1: Membrane-active peptide with cell-penetrating and antimicrobial properties. Biochi-mica et Biophysica Acta (BBA)-Biomembranes 1859(2): 167-176.

iii. Jain A and Chugh A (2016) Mitochondrial transit peptide exhibits cell penetration ability and efficiently delivers macromolecules to mitochondria. FEBS Letters 590(17): 2896-905.

Archana Chugh

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in batch kinetic studies. Wat. Sci. Technol. 75(4): 928-943.

iv. Singh, D. and Kumar, A. 2016. Impact of irrigation using water containing CuO and ZnO nanoparticles on Spinach oleracea grown in soil media. Bull. Env. Cont. Toxicol. 97(4): 548-553.

v. Kumar, A. , Kumar, P., Anandan, A., Fernandes, T.F., Ayokos, G.A., and Biskos, G. 2014. Engineered nanomaterials: Knowledge gaps in fate, exposure, toxicity and future directions”. J. Nanomaterials.2014:1-6.

Figure 1. Research focus of the “Emerging Contaminants Risk Assessment” group in the Department of Civil Engineering, IIT Delhi, India.

ASSOCIATE PROFESSOR Effects of nanomaterials on biodegradation; Reuse of nanomaterials-contaminated water; Risk due to exposures to nanomaterials Department of Civil Engineering Emerging Contaminants Risk Assessment Lab Telephone: +91 11 2659 1166 Office: V 204, Lab: IV-313 Email: arunku@civil.iitd.ac.in Web: web.iitd.ac.in/~arunku

Research: My research group studies on (1) improving understanding on effects of nanomaterials toxicity to bacteria and its implications on biodeg-radation in wastewater treatment, (2) exploring reuse potential of nanomaterials-contaminated water as irrigation water, and (3) identify-ing knowledge gaps in estimating risks due to exposures of nanomaterials from environment. We specifically focus on effects of mixture of nanomaterials in environmental samples. The figure below details different aspects of our research focus and its interconnectedness. The group is actively collaborating with related groups in India IIT Delhi (Chemistry, Kusuma School of Biological Sciences, and Centre of Biomedical Engineering), INST Mohali, IIT Bombay (Centre for Environment Science and Engineering)); USA (Michigan State University East Lansing); Germany (Leibniz University, Hannover).

Representative Publicationsi. Srivastava, S. and Kumar, A. Comparative Cytotoxicity of Nanoparticles and Ions to E.coli in Binary Mixtures. J. Env. Sci. (accepted)

ii. Sundaram, B. and Kumar, A.2017.Long-Term Effect of Metal Oxide Nanoparticles on Activated Sludge. Wat. Sci. Technol. 75(2): 462-473.

iii. Piplai, T., Kumar, A. and Alappat, B.J. 2017.Removal of mixture of ZnO and CuO nanoparticles (NPs) from water using Activated Carbon

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iii. Antimicrobial Nanoprocessing of Polypropylene Fabric for Infection Control, S. Anjum, A. Gupta, D. Sharma, P. Dalal, B. Gupta, Mat. Sci. Eng. C. 69, 1043 (2016).

iv. Development of Novel Wound care Systems based on Nanosilver Nanohydrogels of olymethacrylic Acid with Aloe vera and Curcumin, S. Anjum, A. Sharma, D. Gautam, A. Kapil, S. Bhan, B. Gupta, Mat. Sci. Eng. C. 64, 157 (2016).

v. Fabrication of smooth electrospun nanofibrous gelatin mat for potential application in tissue engineering, J. Joy, P. Gupta, A.R. Ray, A. Gupta, A. Sharma, D. Sharma, B. Gupta, Int. J. Polym. Mat. Polym. Biomat. 64, 509 (2015).

vi. Facile and green synthesis of silver nanoparticles using oxidized pectin M. Tummalapalli, B. L. Deopura, M. S. Alam, B. Gupta. Mat. Sci. Eng. C. 50, 31 (2015)

Nanobiomaterials for Diverse Healthcare ApplicationsAtomic Force Microscopy; ND-MDT

PROFESSOR Department of Textile Technology Nanobiomaterials Telephone: +91 11 2659 1416 Office: TX 213 Lab: TX 110B Email: bgupta@textile.iitd.ernet.in Web: www.bhuvaneshgupta.co.in

ResearchOur research is focused on the development of functional polymeric systems at nanoscale for diverse healthcare applications in tissue en-gineering, wound care systems, implants, catheters and infection resistant materials.

(i)Tissue Engineering : Design and development of biodegradable nanofibrous electrospun mats for tissue engineering for human organ reconstruction with precise inputs in skin, urinary bladder and cardiac systems. (ii) Bioactive nanogels : Enormous potential lies towards the preparation of the nanohydrogels where nanosilver may be generated in-situ in the gel matrix to develop nano coatings on implants. The recent focus of the group lies in the development of functional nanogels with herbal therapeutics such as curcumin and aloe vera and essential oils. (iii) Woundcare Systems : Natural polymers reinforced with nanoparticles and functional moieties have been employed for the development of membranes and infection resistant biomaterials.

Representative Publicationsi. Antimicrobial Nature and Healing Behavoiur of Plasma Functionalized Polyester Suture, S. Anjum, Shanti, Plabita, J. Bora, S. Bhan, B.

Gupta, J. Bioactive Compat. Polym. 2017 (In Press). DOI: 10.1177/0883911516668665

ii. Size-controlled preparation of nanosoy for potential biomedical applications, S. Singh, B. Gupta, Polym. Int. 65, 1373 (2016).

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iii. Manoj Kumar, Gurpal Singh, Sapna Sharma, Dikshi Gupta, Vivek Bansal, Vikas Arora, Madhusudan Bhat, Sandeep K. Srivas-tava, Sameer Sapra, Surender Kharbanda, Amit K. Dinda, Harpal Singh. Intracellular delivery of peptide cargos using iron oxide based nanoparticles: studies on antitumor efficacy of BCL-2 converting peptide, NuBCP-9, Nanoscale, 2014, 6, 14473–14483. (IF- 6.74).

iv. Manoj Kumar, Dikshi Gupta, Gurpal Singh, Sapna Sharma, Madhusudan Bhatt, C.K. Prashant, A.K. Dinda, Surender Kharbanda, Donald Kufe, Harpal Singh. ”Novel polymeric nanoparticles for intracellular delivery of peptide cargos: antitumor efficacy of the Bcl-2 conversion peptide NuBCP-9”, Cancer Research 2014, 74: 3271-3281. (IF-9.26)

v. Masanori Hasegawa, Raj Kumar Sinha, Manoj Kumar, Maroof Alam, Li Yin, Deepak Raina, Akriti Kharbanda, Govind Panchamoorthy, Dikshi Gupta, Harpal Singh, Surender Kharbanda, Don Kufe. Intracellular Targeting of the Oncogenic MUC1-C Protein with a Novel GO-203 Nanoparticle Formulation. Clin Cancer Res clincanres.3000.2014; Published Online First February 23, 2015. (IF 8.5)

PROFESSOR Centre for Biomedical Engineering Telephone: +91 11 2659 1149 Office: Block III, Room 297 Lab: Block III-396 and Block II-189 Email: harpal@cbme.iitd.ac.in Web: web.iitd.ac.in/~harpal/

ResearchNanoplatforms for therapy and diagnostics, drug delivery systems, antimicrobial polymers for water disinfection, polymer synthesis and modification for biomedical and Industrial application. Major focus is on the development of biodegradable nano vehicles for targeted de-livery of anticancer agents, particularly small molecules/peptides/DNAs, for prolonged period of time with an aim to increase the efficacy and reduce toxicity. These interdisciplinary research activities are in collaboration with Dana Farber Cancer Institute, Boston, USA; All India Medical Sciences Delhi and Institute of Nuclear Medicine & Allied Sciences Delhi (DRDO). Biodegradable polymeric nanoparticles and pro-cess of preparation thereof for delivery of chemo, peptide and DNA based anticancer agents has been patented and technology has been transferred to Nanoproteagen, Boston, USA.

Representative Publicationsi. Sruti Chattopadhyay, Avneet Kaur, Swati Jain and Harpal Singh, “Sensitive detection of food-borne pathogen Salmonella by modified

PAN fibers-immunoassay” Biosensors and Bioelectronics, 2013, 45, 274-280. (IF 5.4)

ii. Swati Jain, Sruti Chattopadhyay, Richa Jackeray, C.K.V. Zainul Abid and Harpal Singh, “Novel Functionalized Fluorescent Polymeric Nanoparticles for Immobilization of Biomolecules” Nanoscale, (2013) 5, 6883. (IF 6.74)

Harpal Singh

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ii. Bhattacharyya J, Bellucci JJ, Weitzhandler I, McDaniel JR, Spasojevic I, Li X, Lin CC, Chi J-T A, and Chilkoti A*. A Paclitaxel-Loaded Re-combinant Polypeptide Nanoparticle Outperforms Abraxane in Multiple Murine Cancer Models. Nature Communications. 2015; 6, 7939.

iii. McDaniel JR, Bhattacharyya J, Vargo KB, Hassouneh W, Hammer DA, and Chilkoti A*. Self-Assembly of Thermally Responsive Nanopar-ticles of a Genetically Encoded Peptide Polymer by Drug Conjugation. Angewandte Chemie International Edition. 2013; 52, 6, 1683-1687.

Jayanta Bhattacharyya

ASSISTANT PROFESSOR Centre for Biomedical Engineering Telephone: +91-11-2659-1337 Office: II-388, Lab: III-286 Email: jayanta@cbme.iitd.ac.in Web: http://web.iitd.ac.in/~jayanta/

Research Our research interest is the development of bio-inspired and bio-derived nano-materials to meet unmet needs in treating and diagnosing disease. We strive to use chemistry and engineering approaches to iteratively design, synthesize, characterize, evaluate and validate next generation biomaterials which can self-assemble to form nanoparticle with the goal of making a translational impact on improving human health. A major research focus is developing bio-inspired materials that will allow better therapeutic outcome for cancer therapy.

In my post-doctoral studies, I demonstrated that conjugation of multiple copies of hydrophobic chemotherapeutic to recombinant chimeric polypeptide spontaneously self-assemble into sub-100-nm-sized, near-monodisperse nanoparticles which improve plasma half-life, tumor accumulation and therapeutic efficacy of the chemotherapeutic. To encapsulate hydrophilic chemotherapeutics into the core of polymeric nanoparticles, I designed a recombinant asymmetric triblock polypeptide (ATBP) that self-assembles into rod-shaped nanoparticles, and which can be used to conjugate diverse hydrophilic molecules, including chemotherapeutics into their core.

Representative Publicationsi. Bhattacharyya J, Weitzhandler I, Ho SB, Li X, Liu J, Dewhirst MR and Chilkoti A*. Encapsulating a Hydrophilic Chemotherapeutic into

Rod-like Nanoparticles of a Genetically Encoded Asymmetric Triblock Polypeptide Improves its Efficacy. Advanced Functional Materi-als. (early view). 2017. DOI: 10.1002/adfm.201605421

Cell cycle arrest at the G2/M phase by CP-PTX”

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iii. Deshpande S.; Venugopal E.; Kumaraswamy G. and Singh N.; “Cubosomes for delivery of hydrophilic and hydrophobic drugs” ACS Appl. Mater. Interfaces, 2014, 6 (19), pp 17126–17133.

DrNeetuSingh

AssistantProfessorCentreforBiomedicalEngineeringNanomedicineTelephone:+911126591422Office:II394Lab:II394Email:sneetu@iitd.ac.inWeb:http://web.iitd.ac.in/~sneetu

Research:Nanostructures,duetotheirsimilarsizescaleasbio-macromoleculesandcellularcomponents,provideanunprecedentedopportunitytotargetandpotentiallymodulateimportantbiologicalprocesses.Myresearchgroupstrivestocharacterizetheinteractionsofthesematerialswiththebiosystemofinterest,andtooptimizethemforspecificbiomedicalapplicationssuchastissueengineering,drugdeliveryandbio-imaging.Mylabharnessesandintegratesconceptsoffromchemistry,materialsscience,andbiologyforthesystematicdesignandsynthesisofhigh-fidelitybiomedically-relevant nanomaterials. We believe that such a rational approach is necessary for advancing nano-materials and biomedicaltechnologiesofthefuture.

ResearchPublications:1. DhyaniV.;Singh,N.;“Tunablecelladhesionpropertyofsilkfilmsintroducedbygraftpolymerization”,ACSAppl.Mater.Interfaces,2014,

6(7),pp5005–5011.2. ChandraA.;DeshpandeS.;ShindeD.B.;VijayamohananK.P.;Singh,N.;“HighlyBiocompatibleGrapheneQuantumDotsforBioimaging

Applications”,ACSMacroLett.,2014,3(10),pp1064–10683. DeshpandeS.;VenugopalE.;KumaraswamyG.andSinghN.;“Cubosomesfordeliveryofhydrophilicandhydrophobicdrugs”ACSAppl.

Mater.Interfaces,2014,6(19),pp17126–17133.

Nano-Materialsfor Diagnostics/biomarker

detection

Nano-MaterialsforDrugDelivery Nano-Materialsfor TissueEngineering

Nano-MaterialsforBio-imaging

Neetu Singh

ASSISTANT PROFESSOR Centre for Biomedical Engineering Nanomedicine Telephone: +91 11 2659 1422 Office: II 394 Lab: II 394 Email: sneetu@iitd.ac.in Web: http://web.iitd.ac.in/~sneetu

Research: Nanostructures, due to their similar size scale as bio-macromolecules and cellular components, provide an unprecedented opportunity to target and potentially modulate important biological processes. My research group strives to characterize the interactions of these materi-als with the biosystem of interest, and to optimize them for specific biomedical applications such as tissue engineering, drug delivery and bio-imaging. My lab harnesses and integrates concepts of from chemistry, materials science, and biology for the systematic design and synthesis of high-fidelity biomedically-relevant nanomaterials. We believe that such a rational approach is necessary for advancing nano-materials and biomedical technologies of the future.

Representative Publicationsi. Dhyani V.; Singh, N.; “Tunable cell adhesion property of silk films introduced by graft polymerization”, ACS Appl. Mater. Interfaces,

2014, 6 (7), pp 5005–5011.

ii. Chandra A.; Deshpande S.; Shinde D. B.; Vijayamohanan K. P.; Singh, N.; “Highly Biocompatible Graphene Quantum Dots for Bioimag-ing Applications”, ACS Macro Lett., 2014, 3 (10), pp 1064–1068

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v. Goel S., Mishra P. Thymoquinone inhibits biofilm formation and has selective antibacterial activity due to ROS generation Applied Microbiology and Biotechnology 102, 1955–1967 (2018)

vi. Kalyani N., Moudgil A., Das S., Mishra P. Metalloprotein based scalable field effect transistor with enhanced switching behaviour Sen-sors and Actuators B 246: 363–369 (2017).

vii. Kumar S., Lodhi D. K., Goel P., Neeti, Mishra P., Singh J. P. Facile method for fabrication of buckled PDMS silver nanorod arrays as active 3D SERS cage for bacterial sensing Chem. Commun 51: 12411-12414 (2015)

Metalloprotein based field effect transistor Biodegradable nanoparticles for enhanced drug delivery

PROFESSOR Department of Biochemical Engineering and Biotechnology Telephone: +91 11 2659 1015 Office: Block I-331 email: pmishra@dbeb.iitd.ac.in Web: web.iitd.ac.in/~pmishra

ResearchThe current interest of our group is nanoparticle based drug delivery and protein based nanodevices. We are synthesizing hybrid metal-bio-active nanoparticles for their antimicrobial and anticancer properties. Our group is synthesizing drug loaded biodegradable nanoparticles for targeted and enhanced drug delivery. We are using rational protein design for self assembly based nanopatterning and for applications in nanodevices.

Representative Publicationsi. Jaiswal S. and Mishra P. Co-delivery of curcumin and serratiopeptidase in HeLa and MCF cells through nanoparticles show improved

cancer activity. Material Science and Engineering C 92, 673-684 (2018).

ii. Moudgil A., Kalyani N., Sinsinbar G., Das S., Mishra P. S-Layer Protein for Resistive Switching and Flexible Nonvolatile Memory Device.ACS Applied Materials and Interfaces 10, 4866–4873 (2018).

iii. Gahlaut S. K., Kalyani N., Sharan C., Mishra P., Singh J. P. Smartphone based dual mode in situ detection of viability of bacteria using Ag nanorods array. Biosens. Bioelectron.doi.org/10.1016/j.bios.2018.11.025 (2018).

iv. Jaiswal S., Mishra P. Antimicrobial and antibiofilm activity of curcumin-silver nanoparticles with improved stability and selective toxic-ity to bacteria over mammalian cells Med Microbiol Immunol 207, 39-53 (2018)

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Sitikantha Roy

ASSOCIATE PROFESSOR Department of Applied Mechanics Telephone: +91 11 2659 1220 Office: IV 243 Lab: IV 136 Email: sroy@am.iitd.ac.in Web: web.iitd.ac.in/~sroy

ResearchAtomic force microscopy based single cell based force spectroscopy can be used to extract the cell’s elastic, viscoelastic and adhesion properties. These biomechanical properties of live biological cells play important role in cell-matrix adhesion, morphology, and migration. They can be used as potential biomechanical markers in understanding the health state of cells in tissues and in understanding the effects of drugs on cells. We are developing uncertainty-free experimental methods to characterize the cell material and working on developing mathematical contact models for a reliable estimate of the biological cell material properties.

Representative Publicationsi. Simultaneous Analysis of Elastic and Non-Specific Adhesive Properties of Thin Sample and Biological Cell Considering Bottom Sub-

strate Effect. M. Vishwanath, R. Sitikantha, J. Biomech. Eng. (2017).

ii. Shreya Banerjee, Sitikantha Roy, Multiphysics analysis of an asymptotically correct piezoelectric sensor under static and dynamic load, International Journal of Solids and Structures, 2016

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Selected Nano Facilities

Brucker AFM

Ebeam evaporation

E-beam lithography

Ellipsometer

Nanoscale Research Facility @IIT Delhi

Nanoscale Research Facility (NRF) at IIT Delhi has been established in August 2010 with the support from Ministry of Electronics and Information Technology (MeitY) and IIT Delhi for implementing the MeitY

funded project on Research Initiative on “Non-Silicon Based Technologies for Nanofabrication and Nanoscale Devices”. The facility consists of class 100/1000 clean rooms with several state of the art fabrication/thin film deposition equipments and characterization facilities. Online booking system is maintained for the use of the equipments at NRF (http://nrf.iitd.ac.in/slotbooking/). These facilities are also open to other academic insti-tutes and industry. Details of the research facilities are given at NRF website (http://nano.iitd.ac.in/).

The research programme of NRF has been focused on both thematic areas of national importance and basic research with importance to the development of nanoscience and nanotechnology. More than 50 faculty members from different Departments/Centres of IIT Delhi are participating in cutting edge research at Nanoscale Research Facility. Using the facilities at NRF, several deliverables related with Nanophotonics, Nanomagnetics, Nanomechanics, Nanophotovoltaics, Nanoelectronics and Biosensing have been successfully demonstrated. Currently a new mega project NNetRA (Nanoelectronics Network for Research and Application) is being implemented which has been jointly funded by MeitY, DST and IITD. This project focuses on developing Nanoscale Devices for Health, Agriculture, Safety and Energy Sectors. In this NNetRA project there will be networking with IIT Bombay, IIT Madras, IIT Khragpur and IISc Bangalore. With the grant of NNetRA project we are now moving forward from a capacity building to develop micro/nanoscale working prototype devices which can be given to users.

Neeraj KhareCoordinator, NRF

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Double-barrier Langmuir-Blodgett Normal Trough

Maskless lithography

Mask Aliginer

Reactive Ion Etching

Thermal evaporation

Lloyd Interference Lithography

UHV Sputtering

FIB-FESEM System121121120

Inductively Coupled Plasma Reactive Ion Etching Plasma Enhanced Chemical Vapour Deposition System

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Nano Research @ IITDelhi