Resettable sweat-powered wearable electrochromic biosensor

被引：37
作者：
Hartel, Martin C. [1 ,2 ]
Lee, Dongwook [3 ,4 ,5 ]
Weiss, Paul S. [2 ]
Wang, Joseph [1 ]
Kim, Jayoung [3 ,4 ,5 ]
机构：
[1] Univ Calif San Diego, Dept Nanoengineering, La Jolla, CA 92093 USA
[2] Univ Calif Los Angeles, Dept Bioengn, Los Angeles, CA 90095 USA
[3] Yonsei Univ, Dept Med Engn, Coll Med, Seoul 03722, South Korea
[4] Univ Calif Los Angeles, Dept Chem & Biochem, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
[5] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA
来源：
BIOSENSORS & BIOELECTRONICS | 2022年 / 215卷
关键词：
Sweat; Epidermal biosensor; Biofuel cell; Wearable electronics; Electrochromic; Self-powered; BIOFUEL CELLS; RECENT PROGRESS; ASCORBIC-ACID; BLUE FILMS; URIC-ACID; WIRELESS;
D O I：
10.1016/j.bios.2022.114565
中图分类号：
Q6 [生物物理学];
学科分类号：
071011 ;
摘要：
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.
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页数：9
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