The development of flexible and stretchable electronic skins that can mimic the complex characteristics of natural skin is of great value for applications in human motion detection, healthcare, speech recognition, and robotics. In this work, we propose an efficient and low-cost fabrication strategy to construct a highly sensitive and stretchable electronic skin that enables the detection of dynamic and static pressure, strain, and flexion based on an elastic graphene oxide (GO)-doped polyurethane (PU) nanofiber membrane with an ultrathin conductive poly(3,4-ethylenedioxythiophene) (PEDOT) coating layer. The three-dimensional porous elastic GO-doped PU@PEDOT composite nanofibrous substrate and the continuous self-assembled conductive pathway in the nanofiber-based electronic skin offer more contact sites, a larger deformation space, and a reversible capacity for pressure and strain sensing, which provide multimodal mechanical sensing capabilities with high sensitivity and a wide sensing range. The nanofiber-based electronic skin sensor demonstrates a high pressure sensitivity (up to 20.6 kPa^–1), a broad sensing range (1 Pa to 20 kPa), excellent cycling stability and repeatability (over 10,000 cycles), and a high strain sensitivity over a wide range (up to approximately 550%). We confirmed the applicability of the nanofiber-based electronic skin to pulse monitoring, expression, voice recognition, and the full range of human motion, demonstrating its potential use in wearable human-health monitoring systems.

中文翻译：

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具有压力，应变和屈曲敏感性的高度可拉伸的基于纳米纤维的电子皮肤，用于健康和运动监测

可以模仿天然皮肤复杂特征的柔性和可拉伸电子皮肤的开发对于人体运动检测，医疗保健，语音识别和机器人技术中的应用具有巨大的价值。在这项工作中，我们提出了一种高效且低成本的制造策略来构建高度灵敏且可拉伸的电子皮肤，从而能够基于掺杂有氧化石墨烯（GO）的聚氨酯（ PU）纳米纤维膜，具有超薄导电性聚（3,4-乙撑二氧噻吩）（PEDOT）涂层。三维多孔弹性GO掺杂的PU @ PEDOT复合纳米纤维基底和基于纳米纤维的电子皮肤中的连续自组装导电路径提供了更多的接触部位，更大的变形空间，具有可逆的压力和应变传感能力，可提供具有高灵敏度和宽泛传感范围的多模式机械传感能力。基于纳米纤维的电子皮肤传感器具有很高的压力灵敏度（高达20.6 kPa^–1），宽广的感测范围（1 Pa至20 kPa），出色的循环稳定性和可重复性（超过10,000个循环），以及在宽范围内（高达约550％）的高应变灵敏度。我们证实了基于纳米纤维的电子皮肤在脉冲监测，表情表达，语音识别以及整个人体运动中的适用性，证明了其在可穿戴人体健康监测系统中的潜在用途。