Synthesis of single-crystalline silicon nitride nanobelts via catalyst-assisted pyrolysis of a polysilazane
Abbreviated Journal Title
J. Am. Ceram. Soc.
CARBON-NANOTUBE; NANOWIRES; SI; PHOTOLUMINESCENCE; CERAMICS; NANORODS; SI3N4; THIN; Materials Science, Ceramics
Recently, one-dimensional nanostructures have attracted extensive attention since they are potentially important for both applications and fundamental research. In this paper, we report the synthesis of ultra-long single crystal Si3N4 nanobelts via catalyst-assisted pyrolysis of polymeric precursors. The obtained products contain both alpha- and beta-Si3N4 nanobelts, which are 50-100 urn in thickness, 400-1000 urn in width, and a few hundreds of micrometers to several millimeters in length. Different from previous techniques for synthesizing one-dimensional structures, the current nanobelts are synthesized through confined crystallization of an amorphous phase. A solid-liquid-gas-solid reaction/crystallization growth mechanism is proposed. The formation of nanobelts instead of nanowires is attributed to the anisotropy growth at an earlier stage.
Journal of the American Ceramic Society
"Synthesis of single-crystalline silicon nitride nanobelts via catalyst-assisted pyrolysis of a polysilazane" (2005). Faculty Bibliography 2000s. 5805.