材料科学
光致发光
纳米线
聚丙烯腈
紫外线
化学工程
纤维
碳纤维
纳米技术
汽-液-固法
阴极发光
光电子学
发光
复合材料
聚合物
复合数
工程类
作者
Xiangmin Xie,Zhean Su,Dong Huang,Cheng Yang,Yafeng Wang,Kejian He,Qizhong Huang
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2020-11-09
卷期号:32 (8): 085601-085601
被引量:5
标识
DOI:10.1088/1361-6528/abc8b4
摘要
Abstract Although the spontaneous vapor–solid growth of SiC nanowires is a well-established phenomenon, the exact mechanism by which nanowires grow on substrates is still poorly understood. Here, we studied the initial growth of SiC nanowires on carbon sources with different nanotextures via a catalyst-free vapor reaction between a polyacrylonitrile-based carbon fiber and a silicon powder. The results revealed that the SiC nanowires were preferentially formed on the carbon fiber with a higher degree of graphitization. Detailed analyses suggested that the growth behavior of the underlying SiC film formed on the carbon fibers, which is strongly affected by the microstructures of the carbon fibers, plays an important role in the formation of nanowires. In addition, the photoluminescence spectrum of SiC nanowires showed strong ultraviolet–visible emission peaks at an excitation wavelength of 250 nm, which may provide potential applications in the field of optoelectronic devices.
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