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Low-impedance tissue-device interface using homogeneously conductive hydrogels chemically bonded to stretchable bioelectronics
Cited 1 time in
Web of Science
Cited 2 time in Scopus
- Authors
- Issue Date
- 2024-03
- Citation
- Science Advances, Vol.10 No.12, p. eadi7724
- Abstract
- Stretchable bioelectronics has notably contributed to the advancement of continuous health monitoring and point-of-care type health care. However, microscale nonconformal contact and locally dehydrated interface limit performance, especially in dynamic environments. Therefore, hydrogels can be a promising interfacial material for the stretchable bioelectronics due to their unique advantages including tissue-like softness, water-rich property, and biocompatibility. However, there are still practical challenges in terms of their electrical performance, material homogeneity, and monolithic integration with stretchable devices. Here, we report the synthesis of a homogeneously conductive polyacrylamide hydrogel with an exceptionally low impedance (similar to 21 ohms) and a reasonably high conductivity (similar to 24 S/cm) by incorporating polyaniline-decorated poly(3,4-ethylenedioxythiophene:polystyrene). We also establish robust adhesion (interfacial toughness: similar to 296.7 J/m(2)) and reliable integration between the conductive hydrogel and the stretchable device through on-device polymerization as well as covalent and hydrogen bonding. These strategies enable the fabrication of a stretchable multichannel sensor array for the high-quality on-skin impedance and pH measurements under in vitro and in vivo circumstances.
- ISSN
- 2375-2548
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