期刊
BIOSENSORS & BIOELECTRONICS
卷 24, 期 3, 页码 410-414出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2008.04.017
关键词
glucose oxidase (GOD); Au/Ni/copper electrode; electroless-plate; disposable glucose biosensor
类别
资金
- Ministry of Education, Culture, Sports. Science and Technology of Japan (MEXT) [18360170]
- Grants-in-Aid for Scientific Research [18360170] Funding Source: KAKEN
This paper presents a glucose biosensor. which was developed using a Au/Ni/copper electrode. Until now, research regarding the low electrical resistance and uniformity of this biosensor electrode has not been conducted. Glucose oxidase (GOD) immobilized on the electrode effectively plays the role of an electron shuttle, and allows glucose to be detected at 0.055 V with a dramatically reduced resistance to easily oxidizable constituents. The Au/Ni/copper electrode has a low electrical resistance, which is less than 0.01 Omega, and it may be possible to mass produce the biosensor electrode with a uniform electrical resistance. The low electrical resistance has the advantage in that the redox peak occurs at a low applied potential. Using a low operating potential (0.055 V), the GOD/Au/Ni/copper structure creates a good sensitivity to detect glucose, and efficiently excludes interferences froth common coexisting substances. The GOD/Au/Ni/copper sensor exhibits a relatively short response time (about 3 s), and a sensitivity of 0.85 mu A mM(-1) with a linear range of buffer to 33 mM of glucose. The sensor has excellent reproducibility with a correlation coefficient of 0.9989 (n = 100 times) and a total non-linearity error of 3.17%. (C) 2008 Elsevier B.V. All rights reserved.
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