压电
极化率
材料科学
压电系数
兴奋剂
分子
化学物理
纳米技术
计算化学
光电子学
化学
有机化学
复合材料
作者
Jun Xia,Juexin Huang,Yinan Zhao,Chuanliang Feng
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-05-23
卷期号:17 (11): 10280-10290
被引量:2
标识
DOI:10.1021/acsnano.3c00475
摘要
Although molecular piezoelectric materials are ideal constituents for next-generation electronic microdevices, their weak piezoelectric coefficients which restrict their practical applications need to be enhanced by some strategies. Herein, a series of d-phenylalanine derivatives are synthesized and an increased molecular piezoelectric coefficient of their assemblies is achieved by acid doping. The acid doping can increase the asymmetric distribution of charges in the molecules and in turn molecular polarizability, leading to the enhanced molecular piezoelectricity of assemblies. The effective piezoelectric coefficients can be promoted up to 38.5 pm V-1 and four times those without doping, which is also higher than those obtained by the reported methods. Moreover, the piezoelectric energy harvesters can generate voltage up to 3.4 V and current up to 80 nA. This practical strategy can enhance piezoelectric coefficients without varying the crystal structures of the assemblies, which may inspire future molecular design of organic functional materials.
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