Zhang Zhidong, Zhang Huinan, Zhang Qingchao, Zhao Xiaolong, Li Bo, Zang Junbin, Zhao Xuefeng, Zhang Tiansheng
Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China.
School of Software, North University of China, Taiyuan 030051, China.
Micromachines (Basel). 2023 Mar 21;14(3):690. doi: 10.3390/mi14030690.
Wearable sensors integrating multiple functionalities are highly desirable in artificial wearable devices, which are of great significance in the field of biomedical research and for human-computer interactions. However, it is still a great challenge to simultaneously perceive multiple external stimuli such as pressure and temperature with one single sensor. Combining the piezoresistive effect with the negative temperature coefficient of resistance, in this paper, we report on a pressure-temperature dual-parameter sensor composed of a polydimethylsiloxane film, carbon nanotube sponge, and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate). The proposed multifunctional sensor can stably monitor pressure signals with a high sensitivity of 16 kPa, has a range of up to 2.5 kPa, and also has a fast response time. Meanwhile, the sensor can also respond to temperature changes with an ultrahigh sensitivity rate of 0.84% °C in the range of 20 °C to 80 °C. To validate the applicability of our sensor in practical environments, we conducted real-scene tests, which revealed its capability for monitoring = human motion signals while simultaneously sensing external temperature stimuli, reflecting its great application prospects for electronic wearable devices.
集成多种功能的可穿戴传感器在人造可穿戴设备中非常受欢迎，这在生物医学研究领域以及人机交互方面具有重要意义。然而，用单个传感器同时感知压力和温度等多种外部刺激仍然是一个巨大的挑战。本文将压阻效应与电阻负温度系数相结合，报道了一种由聚二甲基硅氧烷薄膜、碳纳米管海绵和聚（3,4-乙撑二氧噻吩）-聚（苯乙烯磺酸盐）组成的压力-温度双参数传感器。所提出的多功能传感器能够以16 kPa的高灵敏度稳定监测压力信号，量程高达2.5 kPa，并且响应时间快。同时，该传感器在20℃至80℃范围内对温度变化的响应灵敏度高达0.84%/℃。为了验证我们的传感器在实际环境中的适用性，我们进行了实际场景测试，结果表明它能够监测人体运动信号，同时感知外部温度刺激，这反映了其在电子可穿戴设备方面的巨大应用前景。
