Contact lens biofuel cell tested in a synthetic tear solution

作者：Reid Russell C; Minteer Shelley D; Gale Bruce K^*

来源：Biosensors and Bioelectronics, 2015, 68: 142-148.

DOI：10.1016/j.bios.2014.12.034

• Enzymatic biofuel cell
• Contact lens
• Buckypaper

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.

• 出版日期2015-6-15