具有非常高压电常数的PMN-PT 纳米线。

PMN-PT nanowires with a very high piezoelectric constant.

机构信息

Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA.

出版信息

Nano Lett. 2012 May 9;12(5):2238-42. doi: 10.1021/nl204334x. Epub 2012 Apr 15.

DOI:10.1021/nl204334x

PMID:22494473

Abstract

A profound way to increase the output voltage (or power) of the piezoelectric nanogenerators is to utilize a material with higher piezoelectric constants. Here we report the synthesis of novel piezoelectric 0.72Pb(Mg(1/3)Nb(2/3))O(3)-0.28PbTiO(3) (PMN-PT) nanowires using a hydrothermal process. The unpoled single-crystal PMN-PT nanowires show a piezoelectric constant (d(33)) up to 381 pm/V, with an average value of 373 ± 5 pm/V. This is about 15 times higher than the maximum reported value of 1-D ZnO nanostructures and 3 times higher than the largest reported value of 1-D PZT nanostructures. These PMN-PT nanostructures are of good potential being used as the fundamental building block for higher power nanogenerators, high sensitivity nanosensors, and large strain nanoactuators.

摘要

提高压电纳米发电机输出电压（或功率）的一个有效方法是利用具有更高压电常数的材料。在这里，我们报告了一种利用水热法合成新型压电 0.72Pb(Mg(1/3)Nb(2/3))O(3)-0.28PbTiO(3)（PMN-PT）纳米线的方法。未经极化的单晶 PMN-PT 纳米线的压电常数（d(33)）高达 381 pm/V，平均值为 373 ± 5 pm/V。这大约是一维 ZnO 纳米结构报道的最大值的 15 倍，也是一维 PZT 纳米结构报道的最大值的 3 倍。这些 PMN-PT 纳米结构具有成为更高功率纳米发电机、高灵敏度纳米传感器和大应变纳米执行器的基本构建块的良好潜力。