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Direct Observation of Ferroelectricity in Quasi‐Zero‐Dimensional Barium Titanate Nanoparticles
Author(s) -
Ray Sugata,
Kolen'ko Yury V.,
Fu Desheng,
Gallage Ruwan,
Sakamoto Naonori,
Watanabe Tomoaki,
Yoshimura Masahiro,
Itoh Mitsuru
Publication year - 2006
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200600297
Subject(s) - piezoresponse force microscopy , ferroelectricity , barium titanate , dielectric , materials science , zero (linguistics) , nanoparticle , nanotechnology , condensed matter physics , optoelectronics , physics , linguistics , philosophy
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 BaTiO 3 nanoparticles as small as 25 nm by using piezoresponse force microscopy (see figure), which verifies the theoretical predictions.