Catalystless synthesis of crystalline Si3N4/amorphous SiO2 nanocables from silicon substrates and N2

被引：36

作者：

Ran, GZ

You, LP

Dai, L

Liu, YL

Lv, Y

Chen, XS

Qin, GG ^{[1
]}

机构：

[1] Peking Univ, Sch Phys, State Key Lab Mesoscop Physm, Beijing 100871, Peoples R China

[2] Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 384卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.cplett.2003.11.069

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Crystalline Si3N4/amorphous SiO2 nanocables have been synthesized from silicon substrates and N-2 at 1250 degreesC without any catalyst. The morphology, composition profiles and photoluminescence of the nanocables have been studied. It has been demonstrated that an inner crystalline Si3N4 is formed whereas the outer SiO2 is amorphous. The nanocables are 90-110 nm in diameter and several micrometers in length, while the core-wires are 30-50 nm in diameter. Intense blue or near violet photoluminescence from these nanocables was observed. A tentative growth mechanism model for the crystalline Si3N4/amorphous SiO2 nanocables has been suggested and discussed. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：94 / 97

页数：4

共 22 条

[1] Strong visible photoluminescence from SiO2 nanotubes at room temperature [J].