Electric field induced structural change for poly(vinylidene fluoride-co-trifluoroethylene) ultrathin films studied by scanning Maxwell stress microscope
作者:
Tisato Kajiyama,
Noppadol Khuwattanasil,
Atsushi Takahara,
期刊:
Journal of Vacuum Science&Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena
(AIP Available online 1998)
卷期:
Volume 16,
issue 1
页码: 121-124
ISSN:1071-1023
年代: 1998
DOI:10.1116/1.589765
出版商: American Vacuum Society
关键词: polymers
数据来源: AIP
摘要:
Poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF/TrFE), VDF 75 mol %] ultrathin films of 10 nm thickness were prepared on gold coated silicon wafer substrates by a spin-coating method and their aggregation states were investigated by Fourier transform infrared reflection absorption spectroscopic measurement. It was found that P(VDF/TrFE) formed a ferroelectric phase even in a confined state such as an ultrathin film. The electric field was locally imposed on the ultrathin film through a gold coated cantilever tip. The change of dipole moment orientation of P(VDF/TrFE) was evaluated by measuring surface potential change, performed by scanning Maxwell stress microscopy (SMM). The SMM images revealed that the local dipole moment orientation of P(VDF/TrFE) in ultrathin films could be changed by an application of electric field through an atomic force microscope tip.
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