Ha Kyoung-Ho, Huh Heeyong, Li Zhengjie, Lu Nanshu
ACS Nano. 2022 Mar 22;16(3):3442-3448. doi: 10.1021/acsnano.2c00308. Epub 2022 Mar 9.
Soft pressure sensors are critical components of e-skins, which are playing an increasingly significant role in two burgeoning fields: soft robotics and bioelectronics. Capacitive pressure sensors (CPS) are popular given their mechanical flexibility, high sensitivity, and signal stability. After two decades of rapid development, e-skins based on soft CPS are able to achieve human-skin-like softness and sensitivity. However, there remain two major roadblocks in the way for practical application of soft CPS: the decay of sensitivity with increased pressure and the coupled response between in-plane stretch and out-of-plane pressure. In addition to existing strategies of building porous and/or high dielectric constant soft dielectrics, are there any other promising methods to overcome those bottlenecks? Are there any further considerations for the widespread deployment of e-skins? This perspective aims to shed some light on those topics.
柔性压力传感器是电子皮肤的关键组件，电子皮肤在两个新兴领域正发挥着越来越重要的作用：软体机器人技术和生物电子学。电容式压力传感器（CPS）因其机械柔韧性、高灵敏度和信号稳定性而广受欢迎。经过二十年的快速发展，基于柔性CPS的电子皮肤能够实现类似人类皮肤的柔软度和灵敏度。然而，柔性CPS在实际应用中仍存在两个主要障碍：灵敏度随压力增加而衰减，以及面内拉伸和面外压力之间的耦合响应。除了构建多孔和/或高介电常数柔性电介质的现有策略外，是否还有其他有前景的方法来克服这些瓶颈？电子皮肤的广泛应用还有哪些需要进一步考虑的因素？本文旨在对这些话题进行一些探讨。
