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Stretchable, Transparent, and Self‐Patterned Hydrogel‐Based Pressure Sensor for Human Motions Detection
Author(s) -
Ge Gang,
Zhang Yizhou,
Shao Jinjun,
Wang Wenjun,
Si Weili,
Huang Wei,
Dong Xiaochen
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201802576
Subject(s) - materials science , self healing hydrogels , pressure sensor , nanotechnology , polyvinyl alcohol , self healing , transparency (behavior) , flexible electronics , biocompatibility , stretchable electronics , biomedical engineering , optoelectronics , composite material , electronics , computer science , chemistry , physics , medicine , alternative medicine , computer security , pathology , polymer chemistry , metallurgy , thermodynamics
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 (>500%) and superior transparency (>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.