[7a-PB2-1~24] 12.3 Functional Materials and Novel Devices

[7a-PB2-12] Effects of humidity on the response properties of hydrogen gas sensor with PVDF films

〇Yuji Imai¹, Daisuke Tadaki², Ma Teng³, Yasuo Kimura⁴, Ayumi Hirano-Iwata^2,3, Michio Niwano^2,5 (1.NIT, Sendai College, 2.Tohoku Univ., RIEC, 3.Tohoku Univ., AIMR, 4.Tokyo Univ. Tech., 5.Tohoku Fukushi Univ.)

Keywords:Hydrogen gas sensor, Piezoelectric PVDF film, Pd film

We have proposed a new type of organic hydrogen gas sensor in which a β-phase poly(vinylidene fluoride) (PVDF) film is coated with thin films of palladium (Pd) on both sides. Volume expansion of the Pd thin film caused by uptake of hydrogen is monitored by a capacitance change of the piezoelectric PVDF thin film. The β-phase PVDF film was synthesized from α-phase PVDF powder by using a wet process that we developed. In this report, we have investigated the effects of humidity on the response properties of hydrogen gas sensor with PVDF films.