Infrared study of nonstoichiometric anatase TiO2 nanopowders

被引：13

作者：

Grujic-Brojcin, M. ^{[1
]}

Scepanovic, M. ^{[1
]}

Dohcevic-Mitrovic, Z. ^{[1
]}

Popovic, Z. V. ^{[1
]}

机构：

[1] Ctr Solid State Phys & New Mat, Inst Phys, Belgrade 11080, Serbia

来源：

SCIENCE OF SINTERING | 2006年 / 38卷 / 02期

关键词：

anatase TiO2; nanopowder; plasmon-phonon coupling; infrared reflectivity;

D O I：

10.2298/SOS0602183G

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The infrared (IR) reflectivity of laser synthesized TiO2 nanopowder in the anatase phase with a small deviation from stoichiometry is reported. The samples were characterized by SEM, XRD and BET measurements as well as Raman and photoluminescence spectroscopy. Analysis of the far IR reflectivity spectrum of the nanopowder reveals a presence of a plasmon mode. The charge carriers resulting from the lattice defects, mainly oxygen vacancies, are responsible for this mode. The dielectric function in a factorized form with a plasmon contribution is used to model the IR reflectivity spectrum and a good agreement between theoretical and experimental results has been found.

引用

页码：183 / 189

页数：7

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