材料科学
铁电性
成核
结晶
薄膜
氟化物
化学工程
硅
压电
旋涂
水合物
复合材料
无机化学
有机化学
纳米技术
化学
冶金
电介质
工程类
光电子学
摘要
β -phase dominant poly(vinylidene fluoride) (PVDF) ferroelectric thin films were obtained on silicon substrates by spin coating the precursor solutions with addition of hydrate salt and drying at an elevated temperature. The remnant polarization of the dense β-phase dominant PVDF thin film was 69.5mC∕m2. The apparent longitudinal piezoelectric coefficient d33 was −17.4pm∕V without taking into account the substrate clamping effect. It was suggested that the hydrate salt functioned as nucleation sites for the crystallization of PVDF molecules, and the intermolecular hydrogen bonding together with dipolar interactions promoted all-trans conformation and β-phase formation.
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