Hexagonal Boron Nitride Nanosheet for Advanced Nanoscale Electronics

and Radiation Shielding

Dr. Zhenguo Huang (UOW) Prof. Ravi Silva (Surrey) A/Prof. Chih-Hao Chang (NC State)

Nature Communications 5, 5678 (2014); ACS Nano, 2013, 7 (9), 7931–7936; Nano Lett., 2012, 12 (3), 1707–1710; Nature Communications 4, 1624, 2013; Nature Materials 14, 301–306 (2015);

Nature Photonics, 2009, 3, 591-594.

Far ultraviolet plane emission

device using the h-BN.

h-BN sandwiched between graphene layers,

Electron tunnelling through h-BN Structure of heterostructure memory device

Strong electroluminesces are observed from the heterostructure

of stacked graphene, TMD, and h-BN.

Applications of Boron Nitride Nanosheets (BNNS) in Electronics

Potential application of 2D materials

in flexible electronics and

schematics of flexible transistor,

made of h-BN, graphene, MoS2.

Hexagonal boron nitride nanosheets (BNNS)

(Dr Huang at UOW)

Nanoscale electronics

(Prof Silva at Surrey)

Radiation shielding

(Prof Chang at NC State)

Design, synthesis,

application

Figure 1. The collaborative research with each investigator’s main task.

(a)

Carbon

1 μm

Challenges in the BNNS synthesis

(d)

0.5 μm AB stacking

4L 3L

1L

2L

AB stacking

B B B B (f)

Table: Energy difference, per unit

cell, relative to the most stable

stacking AB.

Multilayer

h-BN islands

SiO2 particles

(b)

(d) (e)

AA stacking in h-BN. B atom is

top of N atom and vice versa

AB stacking in h-BN. B atom is

seen to be sitted in the middle of

the hexagonal ring in two layers

Figure: Challenges in the BNNS synthesis. (a) multilayer islands of BNNS, carbon contaminations, (b)

SiO2 particles and (c) cracks inside the BNNS are commonly observed after the synthesis of BNNS. (d)

The BNNS grown on solid Cu substrate are small crystalline and (e and f) AB stacking are commonly

observed in the sheet.

Cracks in

the BNNS

(c)

Cracks in the BNNS

Nanoscale, 2016,8, 15926-15933; Physical Review B 83, 235312 (2011); Nano Lett., 2013, 13 (11), 5660–5665

Energy

delivery

Temperature

readings

Energy

delivery

Temperature

readings

Low Temperature Graphene and CNT growth

NanoGrowth™ Setting standards for nano-material fabrication

G.Y. Chen, Silva et al.

CARBON, 49 (2010) 280.

Boskovic, Silva et al. Nature

Materials, 1 165

2001

2011

“There are many unique properties of graphene that make them an ideal

material for electronics, optical, mechanical, structural and chemical

applications. But, the greatest impact could be in Electronics …...”

Graphene Electronics

Future Applications of Nano-Carbons

PTCVD growth of graphene on Ni: rapid

synthesis compared to T-CVD

Top-gated graphene transistors

with polymer-gate dielectrics and

OPVs with graphene TCO

VANTABLACK

http://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAcQjRw&url=http://www.innovationtoronto.com/2014/11/panel-powered-car-could-double-the-range-of-electric-vehicles/&ei=Dt_QVMOOGsrW7Aa994GYCA&psig=AFQjCNFL268AIRiFL_edlhCGz0WQAhVAPw&ust=1423061122065803

Potential Applications

Porous graphene has shown the potential of

separating the freshwater molecules from the salt

water. Similar technique can be adopted for

porous BNNS to improved the separation efficiency.

Using as a thermal interface material (TIM)

to improve the heat transfer from the densely

packed electronics.

The above figure is the generally used TIMs

inside the desktop and laptop computers.

Nano Lett., 2012, 12 (7), pp 3602–3608

Flexible electronics