Quantum size effect in TiO2 nanoparticles:: does it exist?

被引：219

作者：

Monticone, S

Tufeu, R

Kanaev, AV ^{[1
]}

Scolan, E

Sanchez, C

机构：

[1] Univ Paris 13, Inst Galilee, CNRS, Lab Ingn Mat & Hautes Pressions, F-93430 Villetaneuse, France

[2] Univ Paris 06, CNRS, Lab Chim Mat Condensee, F-75252 Paris, France

来源：

APPLIED SURFACE SCIENCE | 2000年 / 162卷

关键词：

nanostructures; semiconductors; optical properties;

D O I：

10.1016/S0169-4332(00)00251-8

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：

We have examined the quantum size effect in anatase TiO2 nanoparticles. No shift of the band gap energy has been observed for sizes 2R greater than or equal to 1.5 nm. On the other hand, we have found unusual variation of the oscillator strength of the first allowed direct transition. The results indicate considerable structural size effect, which disables the effective mass approximation (EMA) in these nanocrystallites. (C) 2000 Elsevier Science B.V. All rights reserved.

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页码：565 / 570

页数：6

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