Direct Observation of Ferroelectricity in Quasi-Zero-Dimensional Barium Titanate Nanoparticles

Practical difficulties in performing direct dielectric measurements have forced researchers to employ only indirect methods to study ferroelectricity in zero‐dimensional materials; a clear understanding of this issue has thus remained elusive. Here, we directly confirm the existence of ferroelectric...

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Published inSmall (Weinheim an der Bergstrasse, Germany) Vol. 2; no. 12; pp. 1427 - 1431
Main Authors Ray, Sugata, Kolen'ko, Yury V., Fu, Desheng, Gallage, Ruwan, Sakamoto, Naonori, Watanabe, Tomoaki, Yoshimura, Masahiro, Itoh, Mitsuru
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 01.12.2006
WILEY‐VCH Verlag
Subjects
Barium Compounds - chemistry
barium titanate
Electricity
ferroelectrics
Microscopy, Atomic Force
Microscopy, Electron, Transmission
Nanoparticles - chemistry
Nanoparticles - ultrastructure
scanning probe microscopy
structure-property relationships
Titanium - chemistry
X-Ray Diffraction
zero dimension (0D)
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Summary:Practical difficulties in performing direct dielectric measurements have forced researchers to employ only indirect methods to study ferroelectricity in zero‐dimensional materials; a clear understanding of this issue has thus remained elusive. Here, we directly confirm the existence of ferroelectricity in near‐single BaTiO3 nanoparticles as small as 25 nm by using piezoresponse force microscopy (see figure), which verifies the theoretical predictions.
Bibliography:ark:/67375/WNG-BDG1536R-W
We would like to thank Dr. T. Taniyama for help with TEM measurements and Dr. K. A. Kovnir for fruitful discussions. S.R. and Y.V.K. thank the JSPS Postdoctoral Fellowships for Foreign Researchers.
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ISSN:1613-6810
1613-6829
DOI:10.1002/smll.200600297