한빛사논문
- 조회238
Martin C. Hartela,b, Dongwook Leec, Paul S. Weissb,d, Joseph Wanga, Jayoung Kimc
aDepartment of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
bDepartment of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
cDepartment of Medical Engineering, College of Medicine, Yonsei University, Seoul, 03722, South Korea
dDepartment of Chemistry & Biochemistry, Department of Materials Science & Engineering, and California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA, 90095, USA
Corresponding authors: Joseph Wang, Jayoung Kim
Abstract
Wearable biofuel cells (BFCs) are being widely studied as self-powered sensors to monitor one's physiological status non-invasively. However, the energy generated by such devices is often insufficient to power accompanying measurement read-out systems and communication protocols. Here, we report a reversible fully printed electrochromic self-powered sensor (ESPS) toward on-body sweat lactate monitoring. The device was realized by integrating a lactate-oxidizable BFC anode, oxygen-reducible BFC cathode, and a reversible Prussian blue (PB) electrochromic display on a single wearable patch. Through modification of the BFC electrodes, the formal potential of the PB display (0.14 V) could be positioned in between the potentials of the lactate oxidation (−0.05 V) and oxygen reduction (0.35 V). Based on this system, the ESPS enables reversible and robust color changes with distinct time- and concentration-dependent profiles. The results demonstrate that the self-powered device has practical on-body applications for continual lactate monitoring with several advantages, including facile reversibility, ease of fabrication, and naked-eye colorimetric read-out.
논문정보
- Research article
- 2022년 11월 (BRIC 등록일 2023-03-07)
- 국내(교신)+국외 연구진
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