Institute of Microelectronics , Tsinghua University , Beijing 100084 , China.
Beijing National Research Center for Information Science and Technology (BNRist) , Tsinghua University , Beijing 100084 , China.
ACS Nano. 2018 Sep 25;12(9):9134-9141. doi: 10.1021/acsnano.8b03391. Epub 2018 Aug 27.
Recently, wearable devices have been attracting significantly increased interest in human motion detection and human physiological signal monitoring. Currently, it is still a great challenge to fabricate strain sensors with high performance and good fit to the human body. In this work, we fabricated a close-fitting and wearable graphene textile strain sensor based on a graphene textile without polymer encapsulation. Graphene oxide acts as a colorant to dye the polyester fabric and is reduced at high temperature, which endows the graphene textile strain sensor with excellent performance. Compared with the previously reported strain sensors, our strain sensor exhibits a distinctive negative resistance variation with increasing strain. In addition, the sensor also demonstrates fascinating performance, including high sensitivity, long-term stability, and great comfort. Based on its superior performance, the graphene textile strain sensor can be knitted on clothing for detecting both subtle and large human motions, showing the tremendous potential for applications in wearable electronics.
最近，可穿戴设备在人体运动检测和人体生理信号监测方面引起了极大的关注。目前，制造具有高性能和良好贴合人体的应变传感器仍然是一个巨大的挑战。在这项工作中，我们制备了一种无需聚合物封装的基于石墨烯纺织品的贴身、可穿戴的石墨烯纺织应变传感器。氧化石墨烯可用作将聚酯纤维染色的着色剂，并在高温下被还原，这使得石墨烯纺织应变传感器具有优异的性能。与之前报道的应变传感器相比，我们的应变传感器表现出明显的随应变增大而负电阻变化的特性。此外，该传感器还具有高灵敏度、长期稳定性和舒适性等迷人的性能。基于其优异的性能，石墨烯纺织应变传感器可以编织在衣物上，用于检测细微和大幅度的人体运动，在可穿戴电子产品方面具有巨大的应用潜力。
