Domain switching kinetics in vinylidene fluoride/tetrafluoroethylene copolymer thin films

The local domain switching of vinylidene fluoride/tetrafluoroethylene copolymer thin films with different higher order structures was investigated by piezoresponse force microscopy. It was found that one-dimensionally grown domains were formed on highly crystallized needle-like crystals after local...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2016-10, Vol.55 (10S), p.10-10TA12
Main Authors: Nakagawa, Yuuta, Hashizume, Yoichiro, Nakajima, Takashi, Gruverman, Alexei, Okamura, Soichiro
Format: Article
Language:English
Subjects:
Chains
Copolymers
Crystallization
Crystals
Microscopy
Switching
Thin films
Vinylidene fluoride
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Summary:The local domain switching of vinylidene fluoride/tetrafluoroethylene copolymer thin films with different higher order structures was investigated by piezoresponse force microscopy. It was found that one-dimensionally grown domains were formed on highly crystallized needle-like crystals after local voltage pulse application. This is because each needle-like crystal consisted of parallel-stacked lamellae with chain folding along its major axis. In addition, it showed two-step domain growth processes, namely, inter lamella domain growth and the growth between lamellae. On the other hand, circular domains were formed on polycrystalline plate-like crystals and as-coated films.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.55.10TA12