Center for Material Design Science, School of Integrated Design Engineering , Keio University , 3-14-1 Hiyoshi , Yokohama 223-8522 , Japan.
ACS Appl Mater Interfaces. 2018 Sep 12;10(36):30689-30697. doi: 10.1021/acsami.8b08933. Epub 2018 Jul 26.
In recent years, wearable and flexible sensors have attracted considerable research interest and effort owing to their broad application prospects in wearable devices, robotics, health monitoring, and so on. High-sensitivity and low-cost pressure sensors are the primary requirement in practical application. Herein, a convenient and low-cost process to fabricate a bionic fish-scale structure poly(dimethylsiloxane) (PDMS) film via air/water interfacial formation technique is presented. High-sensitivity flexible pressure sensors can be constructed by assembling conductive films of graphene nanosheets into a microstructured film. Thanks to the unique fish-scale structures of PDMS films, the prepared pressure sensor shows excellent performance with high sensitivity (-70.86% kPa). In addition, our pressure sensors can detect weak signals, such as wrist pulses, respiration, and voice vibrations. Moreover, the whole process of pressure sensor preparation is cost-effective, eco-friendly, and controllable. The results indicate that the prepared pressure sensor has a profitable and efficient advantage in future applications for monitoring human physiological signals and sensing subtle touch, which may broaden its potential applications in wearable devices.
近年来，由于在可穿戴设备、机器人、健康监测等领域具有广阔的应用前景，可穿戴和柔性传感器引起了相当多的研究兴趣和努力。在实际应用中，高灵敏度和低成本压力传感器是主要要求。本文提出了一种通过气/水界面形成技术制备仿生鱼鳞结构聚二甲基硅氧烷（PDMS）薄膜的简便、低成本方法。通过将石墨烯纳米片的导电膜组装成微结构薄膜，可以构建高灵敏度的柔性压力传感器。由于 PDMS 薄膜具有独特的鱼鳞结构，所制备的压力传感器具有出色的性能，灵敏度高（-70.86%kPa）。此外，我们的压力传感器可以检测到微弱的信号，如手腕脉搏、呼吸和声音振动。此外，压力传感器制备的整个过程具有成本效益、环保且可控。研究结果表明，所制备的压力传感器在监测人体生理信号和感知细微触摸方面具有盈利和高效的优势，这可能拓宽其在可穿戴设备中的潜在应用。
