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Previously, 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...
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