Gold-Coated M13 Bacteriophage as a Template for Glucose Oxidase Biofuel Cells with Direct Electron Transfer

详细信息    查看全文

• 作者：Rita A. Blaik ; Esther Lan ; Yu Huang ; Bruce Dunn
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：January 26, 2016
• 年：2016
• 卷：10
• 期：1
• 页码：324-332
• 全文大小：538K
• ISSN：1936-086X

文摘

Glucose oxidase-based biofuel cells are a promising source of alternative energy for small device applications, but still face the challenge of achieving robust electrical contact between the redox enzymes and the current collector. This paper reports on the design of an electrode consisting of glucose oxidase covalently attached to gold nanoparticles that are assembled onto a genetically engineered M13 bacteriophage using EDC-NHS chemistry. The engineered phage is modified at the pIII protein to attach onto a gold substrate and serves as a high-surface-area template. The resulting “nanomesh” architecture exhibits direct electron transfer (DET) and achieves a higher peak current per unit area of 1.2 mA/cm² compared to most other DET attachment schemes. The final enzyme surface coverage on the electrode was calculated to be approximately 4.74 × 10^–8 mol/cm², which is a significant improvement over most current glucose oxidase (GOx) DET attachment methods.