Quinuclidinium salt ferroelectric thin-film with duodecuple-rotational polarization-directions

Yu-Meng You (), Yuan-Yuan Tang, Peng-Fei Li, Han-Yue Zhang, Wan-Ying Zhang, Yi Zhang, Heng-Yun Ye, Takayoshi Nakamura and Ren-Gen Xiong ()
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Yu-Meng You: Ordered Matter Science Research Center, Southeast University
Yuan-Yuan Tang: Ordered Matter Science Research Center, Southeast University
Peng-Fei Li: Ordered Matter Science Research Center, Southeast University
Han-Yue Zhang: Ordered Matter Science Research Center, Southeast University
Wan-Ying Zhang: Ordered Matter Science Research Center, Southeast University
Yi Zhang: Ordered Matter Science Research Center, Southeast University
Heng-Yun Ye: Ordered Matter Science Research Center, Southeast University
Takayoshi Nakamura: Research Institute for Electronic Science, Hokkaido University
Ren-Gen Xiong: Ordered Matter Science Research Center, Southeast University

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Ferroelectric thin-films are highly desirable for their applications on energy conversion, data storage and so on. Molecular ferroelectrics had been expected to be a better candidate compared to conventional ferroelectric ceramics, due to its simple and low-cost film-processability. However, most molecular ferroelectrics are mono-polar-axial, and the polar axes of the entire thin-film must be well oriented to a specific direction to realize the macroscopic ferroelectricity. To align the polar axes, an orientation-controlled single-crystalline thin-film growth method must be employed, which is complicated, high-cost and is extremely substrate-dependent. In this work, we discover a new molecular ferroelectric of quinuclidinium periodate, which possesses six-fold rotational polar axes. The multi-axes nature allows the thin-film of quinuclidinium periodate to be simply prepared on various substrates including flexible polymer, transparent glasses and amorphous metal plates, without considering the crystallinity and crystal orientation. With those benefits and excellent ferroelectric properties, quinuclidinium periodate shows great potential in applications like wearable devices, flexible materials, bio-machines and so on.

Date: 2017
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DOI: 10.1038/ncomms14934

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