Tattoo-like epidermal electronics as skin sensors for human machine interfaces

• DOI: 10.20517/ss.2021.09
• Publication Date: 2021-09-28T10:42:43Z
• Authors: Tsz Hung Wong; Chun Ki Yiu; Jingkun Zhou; Zhen Song; Yiming Liu; Ling Zhao; Kuanming Yao; Wooyoung Park; Woojung Yoo; Enming Song; Zhaoqian Xie; Xinge Yu
• Keywords: Human skin

Flexible electronic skin (e-skin) has been successfully utilized in diverse applications, including prosthesis sensing, body-motion monitoring and human-machine interfaces, due to its excellent mechanical properties electrical characteristics.However, current e-skins are still relatively thick (> 10 µm) uncomfortable for long-term usage on the human body.Herein, an ultrathin skin-integrated strain sensor with miniaturized dimensions, based piezoresistive effect, stability robustness, is introduced.The fractal curve-shaped Au electrode a serpentine format, which dominant component of sensor, sensitive ambient variations can turn motion into stable signal output.With advanced design metallic electrodes, device presents good operational tolerance towards bending, stretching twisting.The stain allows intimate mounting onto epidermal surface detection body motion.By adopting liquid bandage as encapsulation layer, exhibits thickness (6.2 µm), high sensitivity deformations capability clear motion, such walking, finger bending pulse rate identifiable signals.Furthermore, tattoo-like applied robotic control by tracing results smooth hand nearly without any detention.This e-skin potential wearable electronics interfaces.