Single layer h BN (Boron Nitride) film grown on copper foil

h-BN is an insulator with a direct band gap of 5.97 eV. Due to its strong covalent sp2 bonds in the plane, the in-plane mechanical strength and thermal conductivity of h-BN has been reported to be close to that of graphene. h-BN has an even higher chemical stability than graphene; it can be stable in air up to 1000 °C (in contrast, for graphene the corresponding temperature is 600 °C).

During Chemical Vapor Deposition, BN is grown on both sides of the copper foil

TEM image of perfect hexagonal structure

TEM Thin Film

On SEM image (below), BN is seen as wrinkles on top of the copper foil.

SEM Thin Film

SAD data of h-BN

SAD Data

If transferred onto an SiO2 substrate, the BN film may be seen as a white film. However, it is difficult to recognize the BN film on copper using a microscope.

Absorbance data BN on copper

SEM Thin Film

 

dddq

Key Features

  • Close to complete coverage (90-95%), with some minor holes
  • Thickness of the copper foil is 20 microns
  • High crystalline quality, see SAD (Selected area [electron] diffraction) data
  • Quality is confirmed by TEM. TEM shows perfect hexagonal structure.
Softouchwplk Top