High-performance wearable sensors are required for applications
in medical health and human–machine interaction, but their
application has limited owing to the trade-off between sensitivity,
pressure range, and durability. Herein, we propose the combined spraying
and self-diffusion process of carbon nanotubes (CNTs) to balance and
improve these parameters with the CNTs spontaneously diffusing into
the film surface before the film curing. The obtained sensor not only
achieves high sensitivity (155.54 kPa–1) and ultrawide
pressure detection range (0.1–500 kPa) but also exhibits exceptional
durability (over 12,000 pressure cycles at a high pressure of 300
kPa). In addition, the sensor exhibits a fast response (25 ms), good
stability, and full flexibility. This process is a general approach
that may improve the performance of various types of thin film piezoresistive
sensors. Besides, the fabricated sensors can be flexibly scaled into
sensor arrays and communicate with smart devices to achieve wireless
smart monitoring. At present, the sensor shows broad application prospects
in the fields of intelligent medical health and motion sensing.
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