Abstract
Porous microstructure pressure sensors that are highly sensitive, reliable, low-cost, and environment-friendly have aroused wide attention in intelligent biomedical diagnostics, human–machine interactions, and soft robots. Here, an all-tissue-based piezoresistive pressure sensor with ultrahigh sensitivity and reliability based on the bottom interdigitated tissue electrode and the top bridge of a microporous tissue/carbon nanotube composite was proposed. Such pressure sensors exhibited ultrahigh sensitivity (≈1911.4 kPa−1), fast response time (<5 ms), low fatigue of over 2000 loading/unloading cycles, and robust environmental degradability. These enabled sensors can not only monitor the critical physiological signals of the human body but also realize electrothermal conversion at a specific voltage, which enhances the possibility of creating wearable thermotherapy electronics for protecting against rheumatoid arthritis and cervical spondylosis. Furthermore, the sensor successfully transmitted wireless signals to smartphones via Bluetooth, indicating its potential as reliable skin-integrated electronics. This work provides a highly feasible strategy for promoting high-performance wearable thermotherapy electronics for the next-generation artificial skin.
Highlights
Pressure sensors, which convert pressure signals into electrical signals, offer a variety of existing and emerging applications, such as soft robots, human–machine interfaces, medical diagnostics, and artificial intelligences, among many others [1,2,3,4,5,6]
Even if great progress was made in paper-based pressure sensors, the application is more limited to the detection of basic physiological signals and lacks depth extension, incapable of combining electrothermal properties with mechanical durability for thermotherapy application
We introduced a low-cost, environment-friendly, skin-comfortable, and air-permeable soft tissue as the backbone to monitor microvibration physiological signals and realize pressure-regulated intelligent thermotherapy applications
Summary
Pressure sensors, which convert pressure signals into electrical signals, offer a variety of existing and emerging applications, such as soft robots, human–machine interfaces, medical diagnostics, and artificial intelligences, among many others [1,2,3,4,5,6] Such sensors can be spontaneously mounted on a dynamic and curved epidermis to detect the body’s vital physiological mechanical signals through real-time transmissions, realizing wearable Internet of Things in society [7,8,9,10]. This work opens up more possibilities for practical applications in soft robots, electronic skins, intelligent healthcare, and artificial intelligence
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