The influence of the dipolar field effect on the photochemical reactivity of Sr2Nb2O7 and BaTiO3 microcrystals

被引：58

作者：

Giocondi, Jennifer L. ^{[1
]}

Rohrer, Gregory S. ^{[1
]}

机构：

[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA

来源：

TOPICS IN CATALYSIS | 2008年 / 49卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

dipolar field effect; photochemical reactivity; Sr2Nb2O7; BaTiO3;

D O I：

10.1007/s11244-008-9067-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

It has previously been shown that the dipolar field effect spatially localizes photochemical reaction products on the surfaces of macroscopic ferroelectric crystals. In this work, photochemical reactions that deposit insoluble products on the surface have been used to study the dipolar field effect in microcrystals of BaTiO3 and Sr2Nb2O7. In both cases, the patterns of reduced silver on the surface were consistent with the orientations of the ferroelectric domains within the samples. The results show that dipolar fields associated with the ferroelectric domains in small particles can separate photogenerated charge carriers and spatially localize reaction products.

引用

页码：18 / 23

页数：6

共 18 条

[1] MECHANISM FOR HIGH-VOLTAGE PHOTOVOLTAIC EFFECT IN CERAMIC FERROELECTRICS [J].

BRODY, PS ;

CROWNE, F .

JOURNAL OF ELECTRONIC MATERIALS, 1975, 4 (05) :955-971

[2] LARGE POLARIZATION-DEPENDENT PHOTOVOLTAGES IN CERAMIC BATIO3 + 5WT PERCENT CATIO3 [J].

BRODY, PS .

SOLID STATE COMMUNICATIONS, 1973, 12 (07) :673-676

[3] HIGH-VOLTAGE PHOTOVOLTAIC EFFECT IN BARIUM-TITANATE AND LEAD TITANATE LEAD ZIRCONATE CERAMICS [J].

BRODY, PS .

JOURNAL OF SOLID STATE CHEMISTRY, 1975, 12 (3-4) :193-200

[4]

DAMME H, 1981, J CATAL, V69, P371

[5] REVIEW OF RECENT WORK ON THE BULK PHOTOVOLTAIC EFFECT IN FERRO AND PIEZOELECTRICS [J].

FRIDKIN, VM .

FERROELECTRICS, 1984, 53 (1-4) :169-187

[6] Structure sensitivity of photochemical oxidation and reduction reactions on SrTiO3 surfaces [J].

Giocondi, JL ;

Rohrer, GS .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (07) :1182-1189

[7] Spatial separation of photochemical oxidation and reduction reactions on the surface of ferroelectric BaTiO3 [J].

Giocondi, JL ;

Rohrer, GS .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (35) :8275-8277

[8] Spatially selective photochemical reduction of silver on the surface of ferroelectric barium titanate [J].

Giocondi, JL ;

Rohrer, GS .

CHEMISTRY OF MATERIALS, 2001, 13 (02) :241-242

[9]

GIOCONDI JL, 2003, THESIS CARNEGIE MELL

[10] HIGH-VOLTAGE BULK PHOTOVOLTAIC EFFECT AND THE PHOTOREFRACTIVE PROCESS IN LINBO3 [J].

GLASS, AM ;

LINDE, DVD ;

NEGRAN, TJ .

APPLIED PHYSICS LETTERS, 1974, 25 (04) :233-235

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