Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology , Wuhan 430074, China.
School of Physics and Electronic-Information Engineering, Hubei Engineering University , Xiaogan 432000, Hubei, P. R. China.
ACS Appl Mater Interfaces. 2017 Oct 25;9(42):37493-37500. doi: 10.1021/acsami.7b13016. Epub 2017 Oct 12.
Mimicking the pressure-sensing behavior of biological skins using electronic devices has profound implications for prosthetics and medicine. The developed electronic skins based on single response mode for pressure sensing suffer from a rapid decrease in sensitivity with the increase of pressure. Their highly sensitive range covers a narrow part of tolerable pressure range of the human skin and has a weak response to the injurious high pressures. Herein, inspired by a bioluminescent jellyfish, we develop an electronic skin with dual-mode response characteristics, which is able to quantify and map the static and dynamic pressures by combining electrical and optical responses. The electronic skin shows notable changes in capacitance in the low-pressure regime and can emit bright luminescence in the high-pressure regime, which, respectively, imitates the functions of the mechanoreceptors and nociceptors in the biological skin, enabling it to sense gentle tactile and injurious pressure with sensitivities up to 0.66 and 0.044 kPa, respectively. The complementary highly sensitive sensing ranges of the electronic skin realize a reliable perception to different levels of pressure, and its mechanically robust and stretchable properties may find a wide range of applications in intelligent robots.
利用电子设备模拟生物皮肤的压力感应行为对假肢和医学有深远的影响。现有的基于单一响应模式的压力感应电子皮肤在压力增加时会导致灵敏度迅速下降。它们的高灵敏度范围只覆盖了人类皮肤可承受压力范围的一小部分，并且对有害的高压的响应较弱。受发光水母的启发，我们开发出了一种具有双模式响应特性的电子皮肤，它能够通过电和光响应来定量和绘制静态和动态压力。电子皮肤在低压区表现出明显的电容变化，在高压区发出明亮的光，分别模拟了生物皮肤中的机械感受器和伤害感受器的功能，使其能够以高达 0.66kPa 和 0.044kPa 的灵敏度感知轻柔的触觉和伤害性压力。电子皮肤互补的高灵敏度感应范围实现了对不同压力水平的可靠感知，其机械坚固和可拉伸的特性可能在智能机器人中得到广泛应用。
