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Multifunctional Fiber for Synchronous Bio-Sensing and Power Supply in Sweat Environment
Authors:Xiaoling Tong  Dongzi Yang  Tianjiao Hua  Shuo Li  Bingying Wang  Yuanlong Shao
Affiliation:1. College of Energy, Soochow Institute for Energy and Materials Innovations (SIEMIS), Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, SUDA-BGI Collaborative Innovation Center, Soochow University, Suzhou, 215006 P. R. China;2. Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, 215004 P. R. China;3. School of Materials Science and Engineering, Peking University, Beijing, 100871 P. R. China
Abstract:Continuous monitoring of human sweat, which enables highly sensitive multiple biomarkers analysis with a portable power supply, is increasingly desired for the remote healthcare industry. Smart fibers with on-demand functionality are ideal candidates for fabricating noninvasive and conformal bioelectronic devices owing to their considerable flexibility. Herein, a multifunctional textile patch based on a reduced graphene oxide (rGO)/tetra-aniline (TANi) fiber for simultaneous biomarker monitoring and energy supply is reported. Benefiting from the multi-electrochemical redox states and proton doping/dedoping characteristics of TANi, rGO/TANi hybrid fibers are combined into an energy storage device and biosensor in a physiological environment. GO flakes increase the viscoelasticity of the wet-spinning dope by regulating the noncovalent interactions between TANi aggregates, thereby enhancing the mechanical strength and conductivity of the resulting rGO/TANi hybrid fiber. Consequently, the hybrid fiber exhibits high volumetric capacitance and versatile sensing capability for various physiological analytes, e.g., pH, K+, and glucose in sweat electrolyte. Furthermore, a wireless continuous sweat monitoring system is constructed by integrating the multifunctional fiber sensor into a printed electric circuit board with programmed functionality. Such a delicate integrated design that harnesses the signal collection and communication units is anticipated to facilitate practical applications in personalized diagnostic and physiological health.
Keywords:aniline-oligomers  integrated textile patches  multi-functional fibers  physiological biosensors
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