Department of Mechanical Engineering and Temple Materials Institute, Temple University , Philadelphia, Pennsylvania 19122, United States.
School of Materials Science and Engineering, Nanjing University of Science and Technology , Nanjing 210094, China.
ACS Nano. 2017 Nov 28;11(11):11739-11745. doi: 10.1021/acsnano.7b07090. Epub 2017 Nov 15.
Multifunctional properties of chiral molecules arise from the coexistence of mirror-symmetry-induced stereoisomers and optical rotation characteristics in one material. One of these complex phenomena in these molecules is chiral ferroelectricity, providing the coupling between polarized light and the spatial asymmetry induced dipole moment. Herein we describe the chiral polarization and electroresistance in molecular ferroelectric (R)-(-)-3-hydroxyquinuclidinium chloride thin films with a Curie temperature of 340 K. The high transmittance of chiral ferroelectrics is coupled with polarized light for a linear electro-optic effect, which exhibits angle-dependent optical behaviors. The polarization-controlled conductance imposes a large on/off ratio (∼26.6) of electroresistive switching in molecular ferroelectrics with superior antifatigue endurance.
手性分子的多功能性质源于一种材料中存在的镜像对称诱导的立体异构体和光学旋转特性。这些分子中的复杂现象之一是手性铁电性，它提供了极化光与空间非对称诱导偶极矩之间的耦合。本文描述了具有 340 K 居里温度的分子铁电体 (R)-(-)-3-羟基奎宁啶氯化物薄膜中的手性极化和电电阻。手性铁电体的高透过率与极化光耦合，产生线性电光效应，表现出角度相关的光学行为。极化控制的电导在分子铁电体中施加了大的开/关比（约 26.6）的电电阻开关，具有优异的抗疲劳耐久性。
