Journal
BIOSENSORS & BIOELECTRONICS
Volume 68, Issue -, Pages 142-148Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2014.12.034
Keywords
Enzymatic biofuel cell; Contact lens; Buckypaper
Categories
Funding
- National Science Foundation (NSF) [0903715, 1057597]
- Utah Science Technology and Research initiative (USTAR)
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1057597] Funding Source: National Science Foundation
- Division Of Graduate Education
- Direct For Education and Human Resources [0903715] Funding Source: National Science Foundation
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A contact lens biofuel cell was fabricated using buckypaper electrodes cured on a silicone elastomer soft contact lens. The buckypaper anode consisted of poly(methylene green) and a hydrogel matrix containing lactate dehydrogenase and nicotinamide adenine dinucleotide hydrate (NAD(+)). The buckypaper cathode was modified with 1-pyrenemethyl anthracene-2-carboxylate, and then bilirubin oxidase was immobilized within a polymer. Contact lens biofuel cell testing was performed in a synthetic tear solution at 35 degrees C. The open circuit voltage was 0.413 +/- 0.06 V and the maximum current and power density were 61.3 +/- 2.9 mu A cm(-2) and 8.01 +/- 1.4 mu W cm(-2), respectively. Continuous operation for 17 h revealed anode instability as output current rapidly decreased in the first 4 h and then stabilized for the next 13 h. The contact lens biofuel cell presented here is a step toward achieving self-powered electronic contact lenses and ocular devices with an integrated power source. (C) 2014 Elsevier B.V. All rights reserved.
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