College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu 610065 , Sichuan , People's Republic of China.
ACS Appl Mater Interfaces. 2018 Nov 28;10(47):40880-40889. doi: 10.1021/acsami.8b15809. Epub 2018 Nov 15.
Increasingly serious electromagnetic radiation pollution puts higher demands on wearable devices. Electronic sensor skin capable of shielding electromagnetic radiation can provide extra protection in emerging fields such as electronic skins, robotics, and artificial intelligence, but combining the sensation and electromagnetic shielding performance together remains a great challenge. Here, inspired by the structure and functions of the human skin, a multifunctional electronic skin (M-E-skin) with both tactile sensing and electromagnetic radiation shielding functions is proposed. The tactile sensing of human skin is mimicked with irregular dermislike rough surfaces, and the electromagnetic shielding performance not available on natural skin is introduced by mimicking the ultraviolet electromagnetic radiation absorption of melanin in epidermis. The M-E-skin shows superior sensitivity (9.8 × 10 kPa for the pressure range 0-0.2 kPa and 3.5 × 10 kPa within 0.2-20 kPa), broad operating range (0-20 kPa), fast response and relaxation times (<62.5 ms), great pressuring-relaxing stability (10 kPa, 1000 cycles), low operating voltage (0.1 V), low power consumption (1.5 nW), and low detection limit (5 Pa). Besides, a broad range of electromagnetic wave (0.5-7.5 GHz) is shielded more than 99.66% by the M-E-skin. This work holds great potential to enlarge the application scope of current electronic skins.
日益严重的电磁辐射污染对可穿戴设备提出了更高的要求。能够屏蔽电磁辐射的电子传感器皮肤可以在电子皮肤、机器人和人工智能等新兴领域提供额外的保护，但将感知和电磁屏蔽性能结合在一起仍然是一个巨大的挑战。在这里，受人体皮肤结构和功能的启发，提出了一种具有触觉感知和电磁屏蔽功能的多功能电子皮肤（M-E-skin）。通过模仿不规则的真皮状粗糙表面来模拟人体皮肤的触觉感知，通过模仿表皮中黑色素对紫外线电磁辐射的吸收来引入自然皮肤所不具备的电磁屏蔽性能。M-E-skin 具有优异的灵敏度（0-0.2 kPa 压力范围内为 9.8×10 kPa，0.2-20 kPa 范围内为 3.5×10 kPa）、宽工作范围（0-20 kPa）、快速的响应和弛豫时间（<62.5 ms）、出色的压力-松弛稳定性（10 kPa，1000 次循环）、低工作电压（0.1 V）、低功耗（1.5 nW）和低检测限（5 Pa）。此外，M-E-skin 可以屏蔽 0.5-7.5 GHz 范围内的大部分电磁波（>99.66%）。这项工作有望扩大当前电子皮肤的应用范围。
