title: Quinuclidinium salt ferroelectric thin-film with duodecuple-rotational polarization-directions.
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.
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Yu-Meng
authors.initials: YM
authors.lastname: You
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Tang
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Li
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Han-Yue
authors.initials: HY
authors.lastname: Zhang
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Wan-Ying
authors.initials: WY
authors.lastname: Zhang
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Heng-Yun
authors.initials: HY
authors.lastname: Ye
authors.affiliation: Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan.
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Nakamura
authors.affiliation: Ordered Matter Science Research Center, Southeast University, Nanjing 211189, P. R. China.|Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P. R. China.
authors.forename: Ren-Gen
authors.initials: RG
authors.lastname: Xiong