Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7886843 | Ceramics International | 2018 | 22 Pages |
Abstract
SiC/SiO2 heterojunctions have been synthesized at 1400â¯Â°C by chemical vapor deposition, using Si and phenolic resin powder as starting materials and TiO2 nanoparticles as catalyst. The morphology of the SiC/SiO2 heterojunctions consists of chain-bead shaped and core-shell chains, and the heterojunctions are up to several hundred microns in length, with diameters of 0.3-1â¯Âµm in the chains and 2-8â¯Âµm in the beads. A vapor-solid tip-growth mechanism for the formation of the heterojunctions is proposed. Photoluminescence spectra of SiC/SiO2 heterojunctions exhibit a significant blue-shift, which indicates that these materials are ideal for application in new optoelectronic devices. The TiO2 nanoparticles play a key role in promoting the formation and growth of the heterojunction nanochains as well as in enhancing their luminescence properties.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Xiaoyu Chen, Xinhong Liu, Xinjia Geng, Quanli Jia,