High Piezoelectric Activity in Nonpoled Thin Films Prepared by Vapor Deposition Polymerization
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概要
- 論文の詳細を見る
The piezoelectric constant of 50 pm V-1 and pyroelectric constant of 20 μC m-2 K-1 were obtained for polyurea thin films (${\sim}300$ nm) prepared by vapor deposition polymerization from methane diisocyanate and diaminofluorene. The pyroelectric signal and the infrared spectrum indicate that the dipoles of urea groups in the polymer were highly oriented normal to the surface of the aluminum substrate to induce remanent polarization without a conventional poling process. The piezoelectricity observed for the film is due to the coupling effect of the remanent polarization and electrostriction. No ferroelectric polarization reversal was observed for the film up to 390 K.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-07-25
著者
-
Tasaka Shigeru
Department Of Material Science Department Of Applied Chemistry Faculty Of Engineering Shizuoka Unive
-
Kubono Atsushi
Department of Materials Science and Chemical Engineering, Shizuoka University, Hamamatsu 432-8561, Japan
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Murai Masashi
Department of Materials Science and Chemical Engineering, Shizuoka University, Hamamatsu 432-8561, Japan
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