Wang Jian, Suzuki Ryuki, Ogata Kentaro, Nakamura Takuto, Dong Aixue, Weng Wei
Center for Material Design Science, School of Integrated Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan.
College of Textile and Garment, Shaoxing University, Shaoxing 312000, Zhejiang, China.
Polymers (Basel). 2020 Aug 13;12(8):1814. doi: 10.3390/polym12081814.
Flexible and wearable electronics have huge potential applications in human motion detection, human-computer interaction, and context identification, which have promoted the rapid development of flexible sensors. So far the sensor manufacturing techniques are complex and require a large number of organic solvents, which are harmful not only to human health but also to the environment. Here, we propose a facile solvent-free preparation toward a flexible pressure and stretch sensor based on a hierarchical layer of graphene nanoplates. The resulting sensor exhibits many merits, including near-linear response, low strain detection limits to 0.1%, large strain gauge factor up to 36.2, and excellent cyclic stability withstanding more than 1000 cycles. Besides, the sensor has an extraordinary pressure range as large as 700 kPa. Compared to most of the reported graphene-based sensors, this work uses a completely environmental-friendly method that does not contain any organic solvents. Moreover, the sensor can practically realize the delicate detection of human body activity, speech recognition, and handwriting recognition, demonstrating a huge potential for wearable sensors.
柔性可穿戴电子设备在人体运动检测、人机交互和情境识别方面具有巨大的潜在应用，这推动了柔性传感器的快速发展。到目前为止，传感器制造技术复杂，需要大量有机溶剂，这不仅对人体健康有害，而且对环境也有害。在此，我们提出了一种基于石墨烯纳米片分层结构的柔性压力和拉伸传感器的简便无溶剂制备方法。所得传感器具有许多优点，包括近线性响应、低至0.1%的应变检测极限、高达36.2的大应变计因子以及超过1000次循环的优异循环稳定性。此外，该传感器具有高达700 kPa的非凡压力范围。与大多数已报道的基于石墨烯的传感器相比，这项工作采用了完全环保的方法，不含任何有机溶剂。此外，该传感器能够实际实现对人体活动、语音识别和手写识别的精细检测，展示了可穿戴传感器的巨大潜力。
