The flexible stretchable sensors have great potential for implementation in various applications, such as intelligent soft robots, health monitoring, and motion detection. However, most of the flexible stretchable sensors with microstructures and high sensitivities are fabricated by expensive templates and complex processes. In consideration of large-scale fabrication, a low cost and efficient way is in great demand. Herein, electroless plating on Nafion films with decent swelling ratios are proposed to fabricate stretchable sensors with wrinkle-structured electrodes. By adding isopropanol (IPA) to the electroless plating process, the H₂O-IPA sensor with larger swelling ratio shows deeper surface wrinkles, higher surface roughness, and better sensitivity to strain. At the same time, the H₂O-IPA sensor exhibit good durability (500 cycles). By mounting the sensor on the joint of human finger, the motion of the finger bending and even the bending degree can be accurately detected, indicating the potential use in the field of wearable devices and soft electronic skins.

中文翻译：

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用于可穿戴应用的具有脊状微结构的柔性应变传感器

柔性可拉伸传感器在各种应用中具有巨大的实现潜力，例如智能软机器人、健康监测和运动检测。然而，大多数具有微结构和高灵敏度的柔性可拉伸传感器是通过昂贵的模板和复杂的工艺制造的。考虑到大规模制造，非常需要低成本和高效的方式。在此，提出了在具有良好溶胀率的 Nafion 薄膜上进行化学镀以制造具有皱纹结构电极的可拉伸传感器。通过在化学镀工艺中加入异丙醇 (IPA)，溶胀比更大的 H ₂ O-IPA 传感器显示出更深的表面皱纹、更高的表面粗糙度和更好的应变敏感性。同时，H ₂O-IPA 传感器具有良好的耐用性（500 次循环）。通过将传感器安装在人体手指关节上，可以准确检测手指弯曲的运动甚至弯曲程度，在可穿戴设备和软电子皮肤领域具有潜在的应用价值。