Facile synthesis of ultra-small Bi2Te3 nanoparticles, nanorods and nanoplates and their morphology-dependent Raman spectroscopy
Abstract
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.
Keywords
Bi2Te3; Nanorod; Nanoparticle; Nanoplate; Raman; TEM; BISMUTH TELLURIDE; THERMOELECTRIC FIGURE; MERIT
DOI
10.1016/j.matlet.2012.04.135
Citation
Materials Letters Volume 82, 1 September 2012, Pages 112–115
Date of this Version
9-1-2012
Recommended Citation
Chen, Liangliang; Zhao, Qing; and Ruan, Xiulin, "Facile synthesis of ultra-small Bi2Te3 nanoparticles, nanorods and nanoplates and their morphology-dependent Raman spectroscopy" (2012). Birck and NCN Publications. Paper 868.
http://dx.doi.org/10.1016/j.matlet.2012.04.135