Racemic Amino Acid Piezoelectric Transducer
Racemic Amino Acid Piezoelectric Transducer
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DOI：
10.1103/physrevlett.122.047701
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发表时间：
2019-01-29
影响因子：
8.6
通讯作者：
Thompson, Damien
中科院分区：
文献类型：
--
作者：
Guerin, Sarah;O'Donnell, Joseph;Thompson, Damien
单晶L-氨基酸可以表现出技术上有用的压电和非线性光学性质。在这里，我们预测，使用密度泛函理论，压电电荷和应变和电压张量的外消旋氨基酸DL丙氨酸，并使用建模数据来指导第一宏观和纳米级的压电测量DL-丙氨酸单晶和多晶聚集体。我们证明了电压生成高达0.8 V的DL-丙氨酸晶体膜下简单的手动压缩，两倍高的其他氨基酸晶体。我们的结果表明，净分子手性并不是有机晶体中压电行为的先决条件。本文中呈现的换能器表明DL-丙氨酸晶体可用于诸如生物传感器中的温度和力测量、柔性电子设备中的数据存储以及能量采集器中的机械致动等应用中。
Single crystal L-amino acids can exhibit technologically useful piezoelectric and nonlinear optical properties. Here we predict, using density functional theory, the piezoelectric charge and strain and voltage tensors of the racemic amino acid DL alanine, and use the modeling data to guide the first macroscopic and nanoscopic piezoelectric measurements on DL-alanine single crystals and polycrystalline aggregates. We demonstrate voltage generation of up to 0.8 V from DL-alanine crystal films under simple manual compression, twice as high as other amino acid crystals. Our results suggest that net molecular chirality is not a prerequisite for piezoelectric behavior in organic crystals. The transducer presented herein demonstrates that DL-alanine crystals can be used in applications such as temperature and force measurement in biosensors, data storage in flexible electronic devices, and mechanical actuation in energy harvesters.