Thermoelectric Bi2Te3 nanotubes synthesized by low-temperature aqueous chemical method

被引：57

作者：

Cao, Y. Q. ^{[1
]}

Zhu, T. J. ^{[1
]}

Zhao, X. B. ^{[1
]}

机构：

[1] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 449卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

aqueous chemical synthesis; Bi2Te3; nanotubes; growth mechanism;

D O I：

10.1016/j.jallcom.2006.01.116

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：

Bismuth telluride (Bi2Te3) nanotubes have been synthesized by a low-temperature aqueous chemical method, using Te powders and BiCl3 as the reactants, NaBH4 as the reductant and NaOH as the pH-controller. Microstructure investigations of powders show that the Bi2Te3 nanotubes have an average diameter of about 100 nm, with the length varying from about 500 mn to 1 mu m. The tube walls have a thickness of about 30-40 nm. The growth mechanism of Bi2Te3 nanotubes is discussed in this paper. It is suggested that Bi2Te3 crystals initially grow as flat sheets, and then form a three-dimensional closed shell with the lowest surface energy. The shell must be curved, which could outcome to a Bi2Te3 nanotube at last. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：109 / 112

页数：4

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