Phonon properties of nanosized bismuth layered ferroelectric material - Bi2WO6

被引：94

作者：

Maczka, M. ^{[1
]}

Macalik, L. ^{[1
]}

Hermanowicz, K. ^{[1
]}

Kepinski, L. ^{[1
]}

Tomaszewski, P. ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, Poland

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2010年 / 41卷 / 09期

关键词：

Bi2WO6; Aurivillius phase; bismuth layered ferroelectrics; Raman spectra; infrared spectra; nanoparticles; PHASE-TRANSITION; RAMAN-SPECTROSCOPY; PARTICLE-SIZE; TEMPERATURE; BI4TI3O12; STRAIN;

D O I：

10.1002/jrs.2526

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Nanosized Bi2WO6 was synthesized by a mild hydrothermal crystallization process. This method allowed obtaining plate-like crystallites of very small thickness (down to 3 nm). The effect of particle size on the structure and properties of Bi2WO6 was studied by X-ray diffraction (XRD), transmission electron microscopy, and Raman and infrared spectroscopies. It has been shown that the orthorhombic distortion decreases with decreasing particle size, but the structure of the smallest crystallites is still orthorhombic. Raman studies have also revealed a very strong intensity decrease for those modes that appear mainly for incident and scattered light polarized perpendicular to the layers. This behavior has been attributed to a decrease in the orthorhombic distortion and a plate-like shape of the nanocrystallites. Copyright (C) 2009 John Wiley & Sons, Ltd.

引用

页码：1059 / 1066

页数：8

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