纳米多孔金的驱动与传感特性

Actuating and sensing properties of nanoporous gold.

作者信息

Detsi E, Chen Z G, Vellinga W P, Onck P R, De Hosson J T M

机构信息

Department of Applied Physics, Zernike institute for Advanced Materials and Materials Innovatrion Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.

出版信息

J Nanosci Nanotechnol. 2012 Jun;12(6):4951-5. doi: 10.1166/jnn.2012.4882.

DOI:10.1166/jnn.2012.4882

PMID:22905557

Abstract

We show that variations in the relative humidity give rise to reversible macroscopic dimensional changes in nanoporous gold exposed to ambient air. The macroscopic strain is the consequence of changes in the nanoporous gold surface stress. We have measured reversible strain amplitudes up to 0.02% in response to a 15% change in relative humidity. The direct conversion into mechanical work of the energy involved in the liquid to vapor phase transition of water is attractive for environmentally friendly short-stroke actuator and sensor applications.

摘要

我们表明，相对湿度的变化会导致暴露在环境空气中的纳米多孔金出现可逆的宏观尺寸变化。宏观应变是纳米多孔金表面应力变化的结果。我们测量到，相对湿度变化15%时，可逆应变幅度高达0.02%。水从液相到气相转变所涉及的能量直接转化为机械功，这对于环保型短行程致动器和传感器应用具有吸引力。