Stretchable Gold Nanomembrane Electrode with Ionic Hydrogel Skin-Adhesive Properties

Skin has a dynamic surface and offers essential information through biological signals originating from internal organs, blood vessels, and muscles. Soft and stretchable bioelectronics can be used in wearable machines for long-term stability and to continuously obtain distinct bio-signals in conjunc...

Full description

Saved in:
Bibliographic Details
Published inPolymers Vol. 15; no. 18; p. 3852
Main Authors Lee, Hyelim, Jang, Jaepyo, Lee, Jaebeom, Shin, Mikyung, Lee, Jung Seung, Son, Donghee
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2023
MDPI
Subjects
Adhesives
Alginates
Blood vessels
Chitosan
Elastomers
Electric properties
electrocardiogram monitoring
Electrocardiography
Electrodes
Gels (Pharmacy)
Gold
Hydrogels
Ion currents
ionic conductivity
Mechanical properties
Nanoparticles
Polymers
Shear tests
Signal monitoring
Signal quality
Signal to noise ratio
skin-electrode interface
stretchable electronics
Styrenes
Substrates
Toluene
South Korea
St Louis Missouri
United States > US
Japan
Online AccessGet full text

Cover

More Information
Summary:Skin has a dynamic surface and offers essential information through biological signals originating from internal organs, blood vessels, and muscles. Soft and stretchable bioelectronics can be used in wearable machines for long-term stability and to continuously obtain distinct bio-signals in conjunction with repeated expansion and contraction with physical activities. While monitoring bio-signals, the electrode and skin must be firmly attached for high signal quality. Furthermore, the signal-to-noise ratio (SNR) should be high enough, and accordingly, the ionic conductivity of an adhesive hydrogel needs to be improved. Here, we used a chitosan-alginate-chitosan (CAC) triple hydrogel layer as an interface between the electrodes and the skin to enhance ionic conductivity and skin adhesiveness and to minimize the mechanical mismatch. For development, thermoplastic elastomer Styrene-Ethylene-Butylene-Styrene (SEBS) dissolved in toluene was used as a substrate, and gold nanomembranes were thermally evaporated on SEBS. Subsequently, CAC triple layers were drop-casted onto the gold surface one by one and dried successively. Lastly, to demonstrate the performance of our electrodes, a human electrocardiogram signal was monitored. The electrodes coupled with our CAC triple hydrogel layer showed high SNR with clear PQRST peaks.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15183852