Self-healing hydrogels

Physics

Pathology

Nanotechnology

Polymer chemistry

Biomedical engineering

Electronics

Physical chemistry

Composite material

Chemistry

Metallurgy

Materials science

Alternative medicine

Self-healing

Biocompatibility

Polyvinyl alcohol

Transparency (behavior)

Computer science

Stretchable electronics

Flexible electronics

Computer security

Pressure sensor

Optoelectronics

Medicine

Thermodynamics

Advanced Functional Materials

In this study, a binary networked conductive hydrogel is prepared using acrylamide and polyvinyl alcohol. Based on the obtained hydrogel, an ultrastretchable pressure sensor with biocompatibility and transparency is fabricated cost effectively. The hydrogel exhibits impressive stretchability (&gt;500%) and superior transparency (&gt;90%). Furthermore, the self‐patterned microarchitecture on the hydrogel surface is beneficial to achieve high sensitivity (0.05 kPa −1 for 0–3.27 kPa). The hydrogel‐based pressure sensor can precisely monitor dynamic pressures (3.33, 5.02, and 6.67 kPa) with frequency‐dependent behavior. It also shows fast response (150 ms), durable stability (500 dynamic cycles), and negligible current variation (6%). Moreover, the sensor can instantly detect both tiny (phonation, airflowing, and saliva swallowing) and robust (finger and limb motions) physiological activities. This work presents insights into preparing multifunctional hydrogels for mechanosensory electronics.

Stretchable, Transparent, and Self‐Patterned Hydrogel‐Based Pressure Sensor for Human Motions Detection