Hydrogen activated axial inter-conversion in SiC nanowires

作者：Ruemmeli Mark H; Adebimpe David B; Borowiak Palen Ewa; Gemming Thomas; Ayala Paola; Ioannides Nicholas; Pichler Thomas; Huczko Andrzej; Cudzilo Stanislaw; Knupfer Martin; Buechner Bernd

来源：Journal of Solid State Chemistry, 2009, 182(3): 602-607.

DOI：10.1016/j.jssc.2008.12.004

• Silicon carbide
• Nanowires
• Nanotubes
• Hydrogen
• Activation

A facile low pressure annealing route using NH(3) as a hydrogen source for the structural and chemical modification of SiC nanowires (SiCNWs) is presented. The developed route transforms SiCNWs into tubular SiC nanostructures while coaxial SiO(2)/SiCNWs reverse their sheath/core structure. Our findings Suggest a decomposition process induced via the preferential substitution of silicon by hydrogen and via the difference in diffusion rates of available atomic species, which leads to axial structural rearrangement. In addition to these effects, the procedure improves the crystallinity of the samples. The process could be exploited as a viable route to Manipulate a variety of nanostructures and films for doping, and etching and Structural manipulation.

• 出版日期2009-3