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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Published in:ACS 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
Language:English
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
ISSN:1936-0851, 1936-086X, 1936-086X
Online Access:Get full text
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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.
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ISSN:1936-0851
1936-086X
1936-086X
DOI:10.1021/acsnano.1c01606