对电子信号起反应而萎缩或膨胀的带电荷的凝胶最终可能被用作人工肌肉。田中丰一领导的马州理工学院的物理学家们发现,一种既非固体又非液体形式的电离凝胶,当施加低电压时体积缩小500倍。当电被关闭时凝胶恢复原来的形状。田中说:“这种与体积变化有关的现象能够用以制造开关,影象的记忆单元,传感器和电力机械转换器,例如人工肌肉之类”。但是电离凝胶为什么会改变形状呢?在通电时凝胶中的阳离子和阴离子被吸引到相反的 Charged gels that shrink or swell in response to electronic signals may eventually be used as artificial muscles. Physicists at the Massachusetts Institute of Technology, led by Tanaka One, found that an ionizing gel that is neither solid nor liquid forms a 500-fold reduction in volume when a low voltage is applied. The gel restores its original shape when the electricity is switched off. Tanaka said: “This phenomenon of volume change can be used to make switches, video memory cells, sensors and electromechanical transducers such as artificial muscles.” But why do ionized gels change shape? The cations and anions in the gel are attracted to the opposite