The implementation of tactile functions in array sensors
has created
an urgent need for high-performance force sensors with both high linearity
and sensitivity so as to ensure the uniformity and accuracy of acquisition
of multiple sensing units in the array sensors. In addition, it still
remains challenging to fabricate exquisite geometric constructions
for integrating highly sensitive materials, extraordinary sensitivity,
high stretchability, wide sensing range, and flexibility into a single
type of pressure/strain sensor. Herein, a sensitive flexible sensor
was fabricated that was composed of mixed-dimensional MXene-based
nanocomposites as piezoresistive layers and Ecoflex layers as the
encapsulation. The resultant sensors with MXene (Ti3C2T
x
)-ANF (aramid nanofiber)-BP
(black phosphorus)-gold (Au) nanocomposites exhibited excellent electrical
conductivity, ultrahigh press sensitivity of 0.4986 kPa–1 (0–1 kPa), reliable linearity (R
2 = 0.998), rapid response time of 12 ms, excellent durability over
4000 cycles, and ultrahigh tensile sensitivity of 9188.583. An 8 ×
8 pixel electronic skin was fabricated by the as-prepared mixed-dimensional
MXene-based sensors and tested in the identification of sliding movements
and surface shape, and the good performance shows great potential
applications in the fields of wearable devices, human–machine
interaction, and robotics.
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