Weissmüller J, Viswanath R N, Kramer D, Zimmer P, Würschum R, Gleiter H
Forschungszentrum Karlsruhe, Institut für Nanotechnologie, Karlsruhe, Germany.
Science. 2003 Apr 11;300(5617):312-5. doi: 10.1126/science.1081024.
Dimension changes on the order of 0.1% or above in response to an applied voltage have been reported for many types of materials, including ceramics, polymers, and carbon nanostructures, but not, so far, for metals. We show that reversible strain amplitudes comparable to those of commercial piezoceramics can be induced in metals by introducing a continuous network of nanometer-sized pores with a high surface area and by controlling the surface electronic charge density through an applied potential relative to an electrolyte impregnating the pores.
据报道，包括陶瓷、聚合物和碳纳米结构在内的许多类型材料在施加电压时会发生0.1%或更高量级的尺寸变化，但到目前为止，金属尚未出现这种情况。我们表明，通过引入具有高表面积的纳米级孔隙连续网络，并通过相对于浸渍孔隙的电解质施加电势来控制表面电荷密度，可以在金属中诱导出与商用压电陶瓷相当的可逆应变幅度。
