Niu Guangyu, Wang Zihan, Xue Ye, Yan Jiayi, Dutta Ankan, Chen Xue, Wang Ya, Liu Chaosai, Du Shuaijie, Guo Langang, Zhou Peng, Cheng Huanyu, Yang Li
Department of Architecture and Art, Hebei University of Technology, Tianjin, 300130, China.
State Key Laboratory for Reliability and Intelligence of Electrical Equipment, Hebei Key Laboratory of Smart Sensing and Human-Robot Interaction, School of Mechanical Engineering, Hebei University of Technology, Tianjin 300401, China.
Nano Lett. 2023 Feb 22;23(4):1252-1260. doi: 10.1021/acs.nanolett.2c04384. Epub 2022 Dec 30.
Although flexible humidity sensors are essential for human health monitoring, it is still challenging to achieve high sensitivity and easy disposal with simple, low-cost fabrication processes. This study presents the design and fabrication of highly reliable hand-drawn interdigital electrodes from pencil-on-paper treated with NaCl solution for highly sensitive hydration sensors working over a wide range of relative humidity (RH) levels from 5.6% to 90%. The applications of the resulting flexible humidity sensor go beyond the monitoring of respiratory rate and proximity to characterizations of human skin types and evaluations of skin barrier functions through insensible sweat measurements. The sensor array can also be integrated with a diaper to result in smart diapers to alert for an early diaper change. The design and fabrication strategies presented in this work could also be leveraged for the development of wearable, self-powered, and recyclable sensors and actuators in the future.
尽管柔性湿度传感器对于人体健康监测至关重要，但采用简单、低成本的制造工艺实现高灵敏度和易于处理仍具有挑战性。本研究展示了一种高度可靠的手绘叉指电极的设计与制造方法，该电极由用氯化钠溶液处理过的纸铅笔绘制而成，用于在5.6%至90%的广泛相对湿度（RH）水平下工作的高灵敏度湿度传感器。所得柔性湿度传感器的应用不仅限于呼吸速率监测和接近度检测，还可通过无感汗液测量来表征人类皮肤类型和评估皮肤屏障功能。该传感器阵列还可与尿布集成，制成智能尿布以提醒尽早更换尿布。本工作中提出的设计和制造策略未来也可用于可穿戴、自供电和可回收传感器及致动器的开发。
