Open AccessStress Dissipation Encoded Silk Fibroin Electrode for the Athlete‐Beneficial Silk Bioelectronics
Author(s) -
Choi Woojin,
Heo Deokjae,
Kim Taeho,
Jung Sungwon,
Choi Moonhyun,
Heo Jiwoong,
Kwon JaeSung,
Kim ByeongSu,
Lee Wonhwa,
Koh WonGun,
Cho Jeong Ho,
Lee Sangmin,
Hong Jinkee
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202105420
Subject(s) - fibroin , bioelectronics , silk , materials science , electrode , toughness , sericin , composite material , miniaturization , wearable computer , dissipation , nanotechnology , chemistry , computer science , biosensor , physics , thermodynamics , embedded system
The kinetic body motions have guided the core‐shell fabrics of wearable bioelectronics to be elastoplastic. However, the polymeric electrodes follow the trade‐off relationship between toughness and stretchability. To this end, the stress dissipation encoded silk fibroin electrode is proposed as the core electrode of wearable bioelectronics. Significantly, the high degree of intrinsic stress dissipation is realized via an amino acid crosslink. The canonical phenolic amino acid (i.e., tyrosine) of silk fibroin is engineered to bridge the secondary structures. A sufficient crosslink network is constructed when tyrosine is exposed near the amorphous strand. The stress dissipative tyrosine crosslink affords 12.5‐fold increments of toughness (4.72 to 58.9 MJ m −3 ) and implements the elastoplastic silk fibroin. The harmony of elastoplastic core electrodes with shell fabrics enables the wearable bioelectronics to employ mechanical performance (elastoplasticity of 750 MJ m −3 ) and stable electrical response. The proposed wearable is capable of assisting the effective workouts via triboelectricity. In principle, active mobility with suggested wearables potentially relieves muscular fatigues and severe injuries during daily fitness.