Identification of oxygen vacancy types from Raman spectra of SnO2 nanocrystals

被引：207

作者：

Liu, L. Z. ^{[1
,2
]}

Li, T. H. ^{[1
,2
,3
]}

Wu, X. L. ^{[1
,2
]}

Shen, J. C. ^{[1
,2
]}

Chu, P. K. ^{[4
]}

机构：

[1] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Guangxi Normal Univ, Coll Elect Engn, Guilin 541004, Peoples R China

[4] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2012年 / 43卷 / 10期

关键词：

SnO2; nanocrystals; Raman spectroscopy; oxygen vacancies; annealing processing; density functional calculation; SIZE;

D O I：

10.1002/jrs.4078

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Raman spectra acquired from spherical SnO2 nanocrystals prepared by pulsed laser ablation and hydrothermal synthesis exhibit three oxygen-vacancy-related Raman modes at 234, 573, and 618?cm-1. The peak location and intensity vary with annealing temperature under O2 finally approaching those of bulk materials. Density functional calculation discloses that the three Raman modes stem from subbridging, in-plane, and bridging oxygen vacancies, respectively. Raman spectra can thus be used to discern different types of oxygen vacancies in SnO2 nanocrystals. Copyright (c) 2012 John Wiley & Sons, Ltd.

引用

页码：1423 / 1426

页数：4

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