Facile synthesis of ultra-small Bi2Te3 nanoparticles, nanorods and nanoplates and their morphology-dependent Raman spectroscopy

被引：31
作者：
Chen, Liangliang
Zhao, Qing
Ruan, Xiulin [1 ]
机构：
[1] Purdue Univ, Sch Mech Engn, W Lafayette, IN 47907 USA
来源：
MATERIALS LETTERS | 2012年 / 82卷
基金：
美国国家科学基金会;
关键词：
Bi2Te3; Nanorod; Nanoparticle; Nanoplate; Raman; TEM; BISMUTH TELLURIDE; THERMOELECTRIC FIGURE; MERIT;
D O I：
10.1016/j.matlet.2012.04.135
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-crystalline 0D, 1D and 2D ultra-small Bi2Te3 nanocrystals were synthesized using the pyrolysis of organometallic compound method. The Bi2Te3 nanocrystals was studied with transmission electron microscopy (TEM). Samples synthesized at 35 degrees C possessed a dominant morphology of 0D nanoparticles or 1D nanorods, while samples synthesized at temperatures higher than 75 degrees C possessed a dominant morphology of 2D nanoplates. Phonon vibrations were investigated by Raman spectroscopy. The 2D nanoplates showed similar Raman features as few-quintuple-thick Bi2Te3 layers, while the 0D and 1D nanostructures showed a blue-shifted A(1g)(2) mode and a much stronger A(1u) mode. This is the first report regarding the morphology effect on the Raman-active phonon modes of Bi2Te3 nanocrystals. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：112 / 115
页数：4
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