[9p-PB1-1~22] 12.1 Fabrications and Structure Controls

[9p-PB1-12] Preparation of poly(vinylidene fluoride) thin films on alkali halide crystals and formation of form I crystalline phase

〇Yasuko Koshiba^1,2, Saori Ando^1,2, Yusuke Maeda⁴, Shinya Kawano⁴, Akiyama Azumi^1,2, Shohei Horike^1,2,3, Kenji Ishida⁴, Masahiro Funamashi^1,2 (1.Kobe Univ., 2.Res. Ctr. Membrane & Film Tech., Kobe Univ., 3.Ctr. Environ. Mgmt., Kobe Univ., 4.Kyushu Univ.)

Keywords:

organic ferroelectrics,alkali halide,structural control

Poly(vinylidene fluoride) (PVDF), a ferroelectric polymer, exhibits several crystalline phases. While the Form I crystalline phase shows the highest spontaneous polarization, the most stable structure is the paraelectric Form II crystalline phase; therefore, structural control is essential for achieving ferroelectricity. Focusing on the interaction between PVDF and alkali halides during thin-film formation, we attempted to fabricate PVDF thin films on alkali halide single-crystal substrates.