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Giant flexoelectricity in polyvinylidene fluoride films
Authors:Sivapalan BaskaranNarayanan Ramachandran  Xiangtong HeSankar Thiruvannamalai  Ho Joon LeeHyun Heo  Qin ChenJohn Y Fu
Institution:a Department of Mechanical and Aerospace Engineering, The State University of New York, Buffalo, NY 14260, USA
b GE Global Research Center, 1 Research Circle, Niskayuna, NY 12309, USA
Abstract:Recent studies have shown that giant flexoelectricity may exist in certain elastomers with bent-core molecular structures, which contradicts the previous theoretical estimation that the flexoelectric coupling is small in those materials. In this Letter, we report an analogous phenomenon, i.e., the giant direct flexoelectric effect, observed in a polyvinylidene fluoride (PVDF) film. Our experimental studies indicate that such an enhanced flexoelectric effect might be induced by the interaction between the energy couplings of the apolar and the polar molecular structures of the polymer film under elastic deformation.
Keywords:Flexoelectricity  Polyvinylidene fluoride
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