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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