Catalytic synthesis and growth mechanism of SiC@SiO2 nanowires and their photoluminescence properties

被引：37

作者：

Chen, Kai ^{[1
]}

Fang, Minghao ^{[1
]}

Huang, Zhaohui ^{[1
]}

Huang, Juntong ^{[1
]}

Liu, Yan-gai ^{[1
]}

机构：

[1] China Univ Geosci Beijing, Sch Mat Sci & Technol, Beijing 100083, Peoples R China

来源：

CRYSTENGCOMM | 2013年 / 15卷 / 44期

基金：

中国国家自然科学基金;

关键词：

CORE-SHELL NANOWIRES; LARGE-SCALE SYNTHESIS; SIMPLE THERMAL EVAPORATION; SIC NANOWIRES; OPTICAL-PROPERTIES; NANOCHAIN HETEROJUNCTIONS; SIC/SIOX NANOCABLES; FIELD-EMISSION; NANOSTRUCTURES; NANOPARTICLES;

D O I：

10.1039/c3ce41581c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

SiC@SiO2 nanowires were synthesized on a Si substrate by thermal evaporation method with an iron nitrate catalyst. The as-grown nanowires were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and photoluminescence spectroscopy at room temperature. Characterization indicated that the nanowires were composed of a crystalline SiC core with a thin amorphous SiO2 shell. The typical SiC core diameter was 50-100 nm, whereas the SiO2 shell thickness was 5-10 nm and they had a length of several hundreds of micrometers. A combined vapor-liquid-solid (VLS) base-growth and vapor-solid (VS) tip-growth mechanism is proposed for the growth mode of the as-grown SiC@SiO2 nanowires. The intensive blue-green emission properties of the core-shell SiC-SiO2 nanowires are of significant interest for their potential blue-green emitting device applications.

引用

页码：9032 / 9038

页数：7

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