Abstract
The rational design of high-performance flexible pressure sensors with both high sensitivity and wide linear range attracts great attention because of their potential applications in wearable electronics and human-machine interfaces. Here, polyaniline nanofiber wrapped nonwoven fabric was used as the active material to construct high performance, flexible, all fabric pressure sensors with a bottom interdigitated textile electrode. Due to the unique hierarchical structures, large surface roughness of the polyaniline coated fabric and high conductivity of the interdigitated textile electrodes, the obtained pressure sensor shows superior performance, including ultrahigh sensitivity of 46.48 kPa−1 in a wide linear range (<4.5 kPa), rapid response/relaxation time (7/16 ms) and low detection limit (0.46 Pa). Based on these merits, the practical applications in monitoring human physiological signals and detecting spatial distribution of subtle pressure are demonstrated, showing its potential for health monitoring as wearable electronics.
Highlights
Flexible pressure sensors which mimic the functions of natural skin by transferring various physical deformations into electronic signals have attracted tremendous attention in the applications of wearable devices [1,2], healthcare monitoring [3,4,5] and human-machine interfaces [6,7]
We report a facilely-fabricated textile-based pressure sensor with ultrahigh sensitivity as well as large linearity based on a top bridge of PANI-wrapped nonwoven fabric and screen-printed interdigitated textile electrodes
46.48 wide linear range (
Summary
Flexible pressure sensors which mimic the functions of natural skin by transferring various physical deformations into electronic signals have attracted tremendous attention in the applications of wearable devices [1,2], healthcare monitoring [3,4,5] and human-machine interfaces [6,7]. In order to monitor physiological signals and human motion with explicit details and without distortion, skin-like sensors endowed with both high sensitivity and a large workable pressure range are desirable [8,9]. A number of resistive-type pressure sensors based on elastomers have been engineered with different surface microstructures such as micropyramids, microdomes [17] and epidermal microstructure [18]. These pressure sensors have been reported with high sensitivity and excellent flexibility. A textile is ideal for the substrate of wearable pressure
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