Opto-Electronics & Materials Laboratory Li-Jen Chou ( ) Investigations on low-dimensional nanostructures: synthesis, characterization, applications and

Opto-Electronics & Materials LaboratoryOpto-Electronics & Materials Laboratory

Li-Jen Chou ( 周立人 )

低維奈米結構研究：合成、鑑定、應用與基本成長機制

（ Investigations on low-dimensional nanostructures: synthesis, characterization, applications and f

undamental mechanisms ）

Department of Materials Science and EngineeringNational Tsing Hua University, Hsinchu, Taiwan


Team Members

– 各教師成長不同奈米結構材料

– 陳力俊 : 超高真空穿透式電子顯微鏡觀測– 果尚志 : 多重尺度及階層式的組裝及量測– 呂世源 : 表面功能化處理– 周立人 : 場發射穿透式電子顯微鏡觀測– 徐文光 : 機械性質量測– 嚴大任 : 電子束微影與微光學量測


96年執行情形

Publication 陳力俊、果尚志、呂世源周立人、徐文光、嚴大任s: Impact No. (No. Papers)PI 1: ~10 (3), ~8 (2), ~6 (1), ~4 (7)PI 2: ~ 4 (13)PI 3: ~ 6 (1), ~5(1), ~4 (2)PI 4: ~10 (2), ~8 (2), ~6 (2), ~4 (2)PI 5: ~ 4 (4)Nano Lett. (~10), Adv. Mater. (~8), Small (~6), Che

m. Mater. (~5), J. Mater. Chem. Appl. Phys. Lett. (~4)


97年執行情形

Publications: Impact No. (No. Papers)PI 1: ~ 26 (1), ~ 10 (3), ~8 (3), ~4 (2) , > 3.5 (2)PI 2: ~ >7 (2), >5 (2), > 3.5 (7)PI 3: ~ >8 (1), >6 (1), ~5(2), ~4 (2), > 3.5 (3)PI 4: ~ 10 (3), ~4 (2) , ~ 3.5 (1) PI 5: ~ 4 (1), ~ 3.5 (4) PI 6: ~ 8 (1) , ~ 4 (1) Science (~26), Nano Lett. (~10), Adv. Mater. (~8), S

mall (~6), Chem. Mater. (~5), J. Mater. Chem. (~4), Appl. Phys. Lett. (~3.5)


Prof. Z.L. Wang (Gatech, USA)

Profs. K.N. Tu, Y. Hwang (UCLA, USA)

Prof. D. Shindo (Tohoku Univ. Japan)

Prof. S. Isoda (Kyoto Univ. Japan) Profs. M. Aono, Y. Bando, (NIMS, Japan)

國際合作、校外合作、產學合作


Observation of Atomic Diffusion at Twin-modified Grain Boundaries in Copper


K.C. Chen et al. Science, 321, 1066 (2008).




PSSA Back Cover, May, 2008


J. Mater. Chem. Invited

Highlight Paper


Y.C. Lin et al. Nano Lett. 8, 913 ( 2008)


“In-situ TEM observation of repeating events of nucleation in epitaxial growth of nano CoSi2 in nanowires o

f Si,”

Nano Letters 8, 2194 (2008).


0.0 0.5 1.0 1.5 2.0 2.5 3.0

0

10

20

30

40

50

60

F (

nN)

|L-L0|

(g)(b) (c)

(d) (e) (f)

(a)

0.0 0.3 0.6 0.9 1.2 1.5

0

3

6

9

12

Stre

ss (

MP

a)

Strain (%)

G

L0 L(h)

(µm)

Pcr

3µm

R

L d

Adv. Mater. 20 , 3919 (2008)

”Elastic Properties and Buckling of Silicon Nanowires,”


Formation and Characterization of NixInAs/InAsNanowire Heterostructures

Nano Letters, Vol. 8, No. 12, p 4528 - 4533, (2008).



Coaxial Metal-Oxide-Semiconductor (MOS)

Au/Ga2O3/GaN for Nitride Based Logic Nano

devices


Coaxial Metal-Oxide-Semiconductor (MOS) Au/Ga2O3/GaN Nanowires



Tunable Plasmonic Response from Alkanethiolate-Stabilized Gold Nanoparticle Superlattices: Evidence of Near-Field Coupling

J. Am. Chem. Soc. (Communication) 2008, 130, 824−826

自組裝金奈米粒子超晶格 ( 晶格常數可調 ) 群體耦合式電漿光學響應 ( 近場耦合 )


Comparison of Ni-Si and Co-Si systems

Y.C. Chou et al. Nano Lett. 9 (in press, 2009)


M.P. Lu et al. “Piezoelectric Nanogenerator using p-type ZnO Nanowire Arrays,” Nano Lett. 9, 1223 (2009)


Figure 7.4 (a-c) A sequence of TEM images of the Au-Ga2O3 core-shell nanowires transform into Au-peapodded Ga2O3 nanowires heated at 1000 in the in-situ TEM.℃

In-situ Observation of Complex NanowiresResults and Discussion


Nano-Photonic Switch

Surface Plasmon Resonance (SPR )of Metal Nanoparticles



In our case, an electric potential hologram was acquired by the electron holography under the illumination of the green and red lasers.

Procedures

Green Light

Turn on Turn on

Red Light

Experimental Procedures


Figure (a) and (b) are the electron hologram and reconstructed phase imageunder the illumination of 532 nm laser. The phase shift is mostly due to the mean field potential.

(a) (a)(a) (b)

dzzyxcvV

),,(])/(11[

22


The phase shift image (right figure) due to the LSPR effect (under green light) is deduced.

We assume that these bright spots is due to the excited state of the electrons.

High ElectricPotential Area


The phase shift due to the excited electrons is not obvious under the illumination of red light,which is consistent with the LSPR theory.


Prelim. Results


In-situ TEM FE Measurements


Thanks For Your Attention

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Opto-Electronics & Materials Laboratory Li-Jen Chou ( ) Investigations on low-dimensional nanostructures: synthesis, characterization, applications and