In this study, we report on the development of a stretchable, transparent, and skin-attachable strain sensor integrated with a flexible electrochromic device as a human skin-inspired interactive color-changing system. The strain sensor consists of a spin-coated conductive nanocomposite film of poly(vinyl alcohol)/multi-walled carbon nanotube/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) on a polydimethylsiloxane substrate. The sensor exhibits excellent performance of high sensitivity, high durability, fast response, and high transparency. An electrochromic device (ECD) made of electrochemically synthesized polyaniline nanofibers and V₂O₅ on an indium–tin-oxide-coated polyethylene terephthalate film experiences a change in color from yellow to dark blue on application of voltage. The strain sensor and ECD are integrated on skin via an Arduino circuit for an interactive color change with the variation of the applied strain, which enables a real-time visual display of body motion. This integrated system demonstrates high potential for use in interactive wearable devices, military applications, and smart robots.

中文翻译：

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皮肤集成的透明可拉伸应变传感器，具有交互式变色电致变色显示器

在这项研究中，我们报告了一种可伸缩，透明且可与皮肤连接的应变传感器的开发，该传感器与柔性电致变色设备集成在一起，可作为人类皮肤启发性的交互式变色系统。应变传感器由在聚二甲基硅氧烷衬底上的聚乙烯醇/多壁碳纳米管/聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）的旋涂导电纳米复合膜组成。该传感器具有高灵敏度，高耐用性，快速响应和高透明度的出色性能。由电化学合成的聚苯胺纳米纤维和V ₂ O ₅制成的电致变色器件（ECD）在施加电压的情况下，涂有氧化铟锡的聚对苯二甲酸乙二醇酯薄膜上的颜色会从黄色变为深蓝色。应变传感器和ECD通过Arduino电路集成在皮肤上，可根据所施加应变的变化进行交互式颜色更改，从而可以实时直观地显示人体运动。该集成系统展示了在交互式可穿戴设备，军事应用和智能机器人中使用的巨大潜力。