期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 1, 页码 1597-1605出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b19238
关键词
pressure sensor textile; self-powered; nanofiber structure; motion sensing; pulse monitoring
资金
- National Key RAMP
- D Program of China [2018YFC2000900]
- National Natural Science Foundation of China [51703022, 51873030]
- Natural Science Foundation of Shanghai [18ZR1402100]
- Shanghai Committee of Science and Technology [19QA1400100]
- Shanghai Municipal Science and Technology Committee of Shanghai Outstanding Academic Leaders Plan [18XD1400200]
- Fundamental Research Funds for the Central Universities [18D210101]
- DHU Distinguished Young Professor Program [LZB2017002]
Nowadays, real-time human motion sensing and pulse monitoring can provide significant basis for health assessment and medical diagnosis. Nevertheless, it is still a big challenge to design a lightweight, flexible, and energy-sustainable pressure sensor with high sensitivity and breath ability. Here, we fabricated a triboelectric all-fiber structured pressure sensor via a facile electrospinning technique. The constructed sensor textile holds a composite structure made up of a polyvinylidene fluoride/Ag nanowire nanofibrous membrane (NFM), an ethyl cellulose NFM, and two layers of conductive fabrics. This wearable device with high shape adaptability exhibited excellent sensing capability because of the introduced hierarchically rough structure on the nano fibers. The sensitivity can reach up to 1.67 and 0.20 V.kPa(-1) in the pressure range of 0-3 and 3-32 kPa, respectively. The fabricated sensor textile also showed a superior mechanical stability even after continuous operation of 7200 working cycles. This sensor textile was easily conformable on different desired body parts for dynamic motion sensing and real-time pulse monitoring. It can work in a self-powered manner to detect and quantify various human motions associated with joints, such as elbows, knees, and ankles. Additionally, it can be placed on the carotid artery to capture the pulse signals, serving as a reliable way to reflect the state of health. This work has great possibilities to promote the rapid advancement and broad applications of multifunctional pressure sensors and next-generation wearable electronics.
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