Hierarchically Microstructure-Bioinspired Flexible Piezoresistive Bioelectronics

The naturally microstructure-bioinspired piezoresistive sensor for human–machine interaction and human health monitoring represents an attractive opportunity for wearable bioelectronics. However, due to the trade-off between sensitivity and linear detection range, obtaining piezoresistive sensors wi...

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Bibliographic Details
Published inACS nano Vol. 15; no. 7; pp. 11555 - 11563
Main Authors Yang, Tao, Deng, Weili, Chu, Xiang, Wang, Xiao, Hu, Yeting, Fan, Xi, Song, Jia, Gao, Yuyu, Zhang, Binbin, Tian, Guo, Xiong, Da, Zhong, Shen, Tang, Lihua, Hu, Yonghe, Yang, Weiqing
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 27.07.2021
Subjects
Humans
Movement
Nanofibers - chemistry
Skin
Wearable Electronic Devices
flexible piezoresistive sensor
PVDF/ PANI core-shell nanofibers
human health monitoring
bioinspired micostructure
hierarchical structure
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Summary:The naturally microstructure-bioinspired piezoresistive sensor for human–machine interaction and human health monitoring represents an attractive opportunity for wearable bioelectronics. However, due to the trade-off between sensitivity and linear detection range, obtaining piezoresistive sensors with both a wide pressure monitoring range and a high sensitivity is still a great challenge. Herein, we design a hierarchically microstructure-bioinspired flexible piezoresistive sensor consisting of a hierarchical polyaniline/polyvinylidene fluoride nanofiber (HPPNF) film sandwiched between two interlocking electrodes with microdome structure. Ascribed to the substantially enlarged 3D deformation rates, these bioelectronics exhibit an ultrahigh sensitivity of 53 kPa–1, a pressure detection range from 58.4 to 960 Pa, a fast response time of 38 ms, and excellent cycle stability over 50 000 cycles. Furthermore, this conformally skin-adhered sensor successfully demonstrates the monitoring of human physiological signals and movement states, such as wrist pulse, throat activity, spinal posture, and gait recognition. Evidently, this hierarchically microstructure-bioinspired and amplified sensitivity piezoresistive sensor provides a promising strategy for the rapid development of next-generation wearable bioelectronics.
ISSN:1936-0851
1936-086X
DOI:10.1021/acsnano.1c01606