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High refractive index and dielectric properties of BaTiO3 nanocube/polymer composite films

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Abstract

Single-crystalline BaTiO3 nanocube (BT NC) dispersed polymethyl methacrylate (PMMA) nanocomposite films were fabricated using a spin-coating process. Thermogravimetry indicated that volume fraction of BT NCs in nanocomposite film was achieved above 64% with keeping transparency. Refractive index of BT NC/PMMA composite film was 1.89 at 550 nm. The microstructure of BT NC/PMMA composite films was characterized by homogeneous dispersion of BT NC with high occupancy. Dielectric constant of BT NC/PMMA film was about 41 corresponding to 13 times as high as that of PMMA with low loss below 4%.

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Acknowledgments

This study is based on results obtained from a project commissioned by the New Energy and Industrial Technology Development Organization (NEDO). Synthesis of BT NC by using mass-production equipment was worked by Sakai Chemical Industry Co., LTD. in this project.

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Correspondence to Ken-ichi Mimura.

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Mimura, Ki., Kato, K. High refractive index and dielectric properties of BaTiO3 nanocube/polymer composite films. J Nanopart Res 22, 241 (2020). https://doi.org/10.1007/s11051-020-04971-y

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