Large scale growth and characterization of atomic hexagonal boron nitride layers.
Hexagonal boron nitride (h-BN), a layered material similar to graphite, is a promising dielectric. Monolayer h-BN, so-called "white graphene", has been isolated from bulk BN and could be useful as a complementary two-dimensional dielectric substrate for graphene electronics. Here we report the large area synthesis of h-BN films consisting of two to five atomic layers, using chemical vapor deposition. These atomic films show a large optical energy band gap of 5.5 eV and are highly transparent over a broad wavelength range. The mechanical properties of the h-BN films, measured by nanoindentation, show 2D elastic modulus in the range of 200-500 N/m, which is corroborated by corresponding theoretical calculations.
Song
Li
L
Department of Mechanical Engineering & Materials Science, Rice University, Houston, Texas 77005, USA.
Ci
Lijie
L
Lu
Hao
H
Sorokin
Pavel B
PB
Jin
Chuanhong
C
Ni
Jie
J
Kvashnin
Alexander G
AG
Kvashnin
Dmitry G
DG
Lou
Jun
J
Yakobson
Boris I
BI
Ajayan
Pulickel M
PM