Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education, ‡Institute of Bio-Analytical Chemistry, §School of Materials Science and Engineering, ⊥Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology , Nanjing 210094, P. R. China.
ACS Appl Mater Interfaces. 2017 Sep 20;9(37):32054-32064. doi: 10.1021/acsami.7b09652. Epub 2017 Sep 11.
The recent booming development of wearable electronics urgently calls for high-performance flexible strain sensors. To date, it is still a challenge to manufacture flexible strain sensors with superb sensitivity and a large workable strain range simultaneously. Herein, a facile, quick, cost-effective, and scalable strategy is adopted to fabricate novel strain sensors based on reduced graphene oxide woven fabrics (GWF). By pyrolyzing commercial cotton bandages coated with graphene oxide (GO) sheets in an ethanol flame, the reduction of GO and the pyrolysis of the cotton bandage template can be synchronously completed in tens of seconds. Due to the unique hierarchical structure of the GWF, the strain sensor based on GWF exhibits large stretchability (57% strain) with high sensitivity, inconspicuous drift, and durability. The GWF strain sensor is successfully used to monitor full-range (both subtle and vigorous) human activities or physical vibrational signals of the local environment. The present work offers an effective strategy to rapidly prepare low-cost flexible strain sensors with potential applications in the fields of wearable electronics, artificial intelligence devices, and so forth.
近年来，可穿戴电子设备蓬勃发展，迫切需要高性能的柔性应变传感器。迄今为止，同时制造具有超灵敏性和大工作应变范围的柔性应变传感器仍然是一个挑战。在此，采用一种简便、快速、经济高效且可扩展的策略，基于还原氧化石墨烯编织织物（GWF）来制造新型应变传感器。通过在乙醇火焰中对涂有氧化石墨烯（GO）片的商用棉绷带进行热解，可以在数十秒内同时完成 GO 的还原和棉绷带模板的热解。由于 GWF 的独特分层结构，基于 GWF 的应变传感器具有大的拉伸性（57%应变）、高灵敏度、不明显的漂移和耐用性。GWF 应变传感器成功地用于监测全范围（细微和剧烈）的人体活动或局部环境的物理振动信号。本工作提供了一种快速制备低成本柔性应变传感器的有效策略，该应变传感器在可穿戴电子、人工智能设备等领域具有潜在应用。
