Ultra long SiC nanowires with fluctuating diameters synthesized in a polymer pyrolysis CVD route
Abstract
Large areas of millimeters long β-SiC nanowires with fluctuating diameters were synthesized in a polymer pyrolysis CVD (PPCVD) route. Polycarbosilane was used as the raw material. The morphology and structure of the nanowires were investigated by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that the nanowires had non-periodically fluctuating diameters in the range of 100-250 nm along the axial direction, and were composed of well crystalline β-SiC along the <111> direction. The vapor-solid (VS) mechanism was employed to interpret the nanowires growth procedure, and the diameter fluctuation was resulted from the varying concentration of the local silane fragments.
- Publication:
-
Solid State Sciences
- Pub Date:
- December 2009
- DOI:
- 10.1016/j.solidstatesciences.2009.09.003
- Bibcode:
- 2009SSSci..11.2167L