Multifunctional micro‐force sensing in one device is an urgent need for the higher integration of the smaller flexible electronic device toward wearable health‐monitoring equipment, intelligent robotics, and efficient human–machine interface. Herein, a novel microchannel‐confined MXene‐based flexible piezoresistive sensor is demonstrated to simultaneously achieve multi‐types micro‐force sensing of pressure, sound, and acceleration. Benefiting from the synergistically confined effect of the fingerprint‐microstructured channel and the accordion‐microstructured MXene materials, the as‐designed sensor remarkably endows a low detection limit of 9 Pa, a high sensitivity of 99.5 kPa−1, and a fast response time of 4 ms, as well as non‐attenuating durability over 10 000 cycles. Moreover, the fabricated sensor is multifunctionally capable of sensing sounds, micromotion, and acceleration in one device. Evidently, such a multifunctional sensing characteristic can highlight the bright prospect of the microchannel‐confined MXene‐based micro‐force sensor for the higher integration of flexible electronics.
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.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.