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Flexible Waterproof Piezoresistive Pressure Sensors with Wide Linear Working Range Based on Conductive Fabrics

Nano-Micro Letters 2020年第11期12卷 229-241页

作者： Hongcheng Xu Libo Gao Yuejiao Wang Ke Cao Xinkang Hu Liang Wang Meng Mu Min Liu Haiyan Zhang Weidong Wang Yang Lu School of Mechano‑Electronic Engineering Xidian UniversityXi’an 710071People’s Republic of China CityU-Xidian Joint Laboratory of Micro/Nano-Manufacturing Xi’an 710071People’s Republic of China Department of Mechanical Engineering City University of Hong KongKowloon 999077Hong Kong SARPeople’s Republic of China Nano‑Manufacturing Laboratory(NML) Shenzhen Research Institute of City University of Hong KongShenzhen 518057People’s Republic of China Micro‑/Nano‑technology Research Center State Key Laboratory for Manufacturing Systems EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China

Developing flexible sensors with high working performance holds intense interest for diverse applications in leveraging the Internet-of-things(IoT)*** flexible piezoresistive sensors,traditionally most efforts are focused on tailoring the sensing materials to enhance the contact resistance variation for improving the sensitivity and working range,and it,however,remains challenging to simultaneously achieve flexible sensor with a linear working range over a high-pressure region(>100 kPa)and keep a reliable ***,we devised a laserengraved silver-coated fabric as"soft"sensor electrode material to markedly advance the flexible sensor's linear working range to a level of 800 kPa with a high sensitivity of 6.4 kPa^-1 yet a fast response time of only 4 ms as well as long-time durability,which was rarely reported *** integrated sensor successfully routed the wireless signal of pulse rate to the portable smartphone,further demonstrating its potential as a reliable *** with the rationally building the electrode instead of merely focusing on sensing materials capable of significantly improving the sensor's performance,we expect that this design concept and sensor system could potentially pave the way for developing more advanced wearable electronics in the future.

关键词： Flexible sensor Piezoresistive graphite flakes Laser engraving Silver fabrics

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