Flexible sensors as emerging wearable electronics are
widely utilized
in exercise guidance, medical services, intelligent robots, etc.,
providing rich data for the Internet of Things and promoting the intelligence
and convenience of people’s lives. However, it is still difficult
to design and fabricate multifunctional flexible sensors with excellent
comprehensive performance and universality by balancing various sensing
parameters in a scientific and economical way. Herein, a flexible
sensor with a synergistic conductive network composed of linear and
staggered-rib conductive pathways is prepared by screen printing,
which realizes the improvement of comprehensive sensing performance
and the expansion of functions. The prepared flexible sensor exhibits
ultrahigh sensitivity, wide response range, excellent stability, and
durability and has been successfully applied to detect human biomechanical
signals induced by mouth opening, chewing, swallowing, breathing,
clenching, and various joint movements. The motion pattern recognition
for different movements of the knee joint is achieved by artificial
intelligence with a high accuracy of 93.7%. Furthermore, the portable
wireless physiological monitoring device assembled by the prepared
sensor is developed to continuously monitor the electromyography (EMG)
and electrocardiogram (ECG) signals for a long time, stably, reliably,
and accurately in a noninvasive and wearable manner, which can provide
high-value big data support for health warning, early disease screening,
and diagnosis, showing great application potential and commercial
value in the field of intelligent medicine and personalized health
care. The innovative and scalable sensing performance optimization
strategy proposed in this work promotes the popularization and application
of high-performance and multifunctional wearable electronics.
