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压离子机械受体:在水凝中强力诱导电流生成

Yuta Dobashi^1,2,3, Dickson Yao¹, Yael Petel⁴

¹Advanced Materials and Process Engineering Laboratory, University of British Columbia, Vancouver, BC, Canada.

Science (New York, N.Y.)

|April 28, 2022

概括

研究人员使用将压力转化为离子电流的水凝开发了一种新的压离子皮肤. 这项技术模仿人类的体感系统,

科学领域:

材料科学
生物物理
神经科学

背景情况:

人体体感官系统通过离子电流处理触觉信息.
目前的人工感觉接口往往缺乏生物系统的灵敏度和适应性.

研究的目的:

研究能够将压力转化为离子电流的水凝,从而形成"离子皮肤".
探索这种皮质皮肤对神经调节和生物感官接口的潜力.

主要方法:

具有不同阴离子和阴离子移动性的水凝膜的制造.
有固定电荷梯度的水凝膜.
压离子电流生成的特征及其对材料性能的依赖.

主要成果:

在水凝中产生离子电流,模仿生物机械受体,持续时间可变 (毫秒到几百秒).
这些电流表现出直接神经调节和肌肉激发的能力.
通过控制离子移动性和固定电荷梯度来调整信号的大小和持续时间.
开发的水凝的电荷密度明显高于现有的 triboelectric 和 piezoelectric 装置.

结论:

基于水凝的皮质皮肤为实现自动供电的超软机械感应器提供了有前途的途径.
这项技术在先进的生物感官接口和神经刺激中具有潜在的应用.
这些发现强调了离子移动性和电荷梯度在设计有效的压离子材料中的重要性.

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