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Kwak, Sang Kyu
Kyu’s MolSim Lab @ UNIST
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Tailored poly (vinylidene fluoride-co-trifluoroethylene) Crystal Orientation for a Triboelectric Nanogenerator through Epitaxial Growth on a Chitin Nanofiber Film

Eom, KijooShin, Young-EunKim, Joong-KwonJoo, Se HunKim, KyungtaeKwak, Sang KyuKo, HyunhyubJin, JunghoKang, Seok Ju
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NANO LETTERS, v.20, no.9, pp.6651 - 6659
Tailoring the crystal orientation of poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) has attracted widespread interest because of its effects on the ferroelectric properties required for various electronic devices. In this study, we investigated the epitaxial growth of PVDF-TrFE on a chitin film for developing triboelectric nanogenerators (TENGs). The crystallographic match between the chitin and PVDF-TrFE enables the development of the intended crystal orientation, with the PVDF-TrFE polarization axis aligned perpendicular to the substrate. In addition, the epitaxially grown PVDF-TrFE on chitin not only enhances the performance of the TENG but also increases the stability of the hygroscopic chitin film against water. The corresponding TENG exhibits a significantly higher output current compared to that of a nonepitaxial PVDF-TrFE/chitin film. Furthermore, the triboelectric sensors based on epitaxial PVDF-TrFE/chitin films allow the monitoring of subtle pressures, suggesting that tailoring the crystal orientation of PVDF-TrFE is a promising approach for developing high-performance TENGs.
American Chemical Society
Keyword (Author)
epitaxial growthferroelectric polymerchitinPVDF-TrFEtriboelectric


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