College of Materials Science and Engineering (CMSE), Beijing University of Chemical Technology, Chaoyang District North Third Ring Road 15, Beijing 100029, China.
Nanoscale. 2019 Mar 7;11(10):4258-4266. doi: 10.1039/c8nr08503j.
Flexible electronic devices have received more and more attention. In particular, for pressure sensors, traditional methods for improving sensing performances are mostly based on the construction of microstructured templates. However, it still remains significantly challenging to conveniently fabricate thin-film sensors which possess flexibility, high sensitivity and location detection ability. Inspired by the microstructure of the human skin surface, herein, a new pressure sensor with a hierarchical structure and gradient reduced graphene oxide (rGO) wrinkles is reported. Benefiting from the skin-like structure, the pressure sensor demonstrates outstanding sensitivity, reaching 178 kPa-1; it can also detect pressure as small as 42 Pa. Furthermore, the concept of designing and constructing a gradient structure has been applied to achieve position detection, which is expected to find practical applications in human motion detection.
柔性电子设备受到了越来越多的关注。特别是对于压力传感器，传统的提高传感性能的方法主要是基于微结构化模板的构建。然而，方便地制造具有灵活性、高灵敏度和位置检测能力的薄膜传感器仍然具有很大的挑战性。受人体皮肤表面微观结构的启发，本文报道了一种具有分层结构和梯度还原氧化石墨烯（rGO）褶皱的新型压力传感器。受益于类皮肤结构，该压力传感器表现出优异的灵敏度，达到 178 kPa-1；它还可以检测小至 42 Pa 的压力。此外，设计和构建梯度结构的概念已经被应用于实现位置检测，这有望在人体运动检测中找到实际应用。
