Semiconducting boron carbonitride nanostructures: Nanotubes and nanofibers

Highly oriented boron carbonitride (BCN) nanostructures consisting of nanot ubes and nanofibers have been synthesized by bias-assisted hot-filament che mical vapor deposition from the source gases of B2H6, CH4, N-2, and H-2. It is found that the B concentration of the BCN nanostructures increases with increasing B2H6 in the gas mixture, and the highest B concentration is 45 at. %. Photoluminescence spectrum shows that the BCN nanostructures, identi fied as B0.34C0.42N0.24, are semiconductors with a band gap energy of aroun d 1.0 eV. (C) 2000 American Institute of Physics. [S0003-6951(00)00839-1].