Enzyme-free glucose sensors with channels composed of necked ZnO nanoparticles on plastic
- Authors
- Park, Sukhyung; Cho, Kyoungah; Kim, Sangsig
- Issue Date
- 8월-2011
- Publisher
- ELSEVIER
- Keywords
- Plastic sensor; Glucose; Enzyme-free; Biosensor
- Citation
- MICROELECTRONIC ENGINEERING, v.88, no.8, pp.2611 - 2613
- Indexed
- SCIE
SCOPUS
- Journal Title
- MICROELECTRONIC ENGINEERING
- Volume
- 88
- Number
- 8
- Start Page
- 2611
- End Page
- 2613
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/111867
- DOI
- 10.1016/j.mee.2011.02.054
- ISSN
- 0167-9317
- Abstract
- In this study, enzyme-free glucose sensors with channels composed of necked zinc oxide (ZnO) nanoparticles (NPs) are constructed on a plastic substrate, and their sensing characteristics are examined. When a phosphate buffer solution (PBS) of lower pH than the isoelectric point of ZnO is adsorbed on the necked ZnO NP channels, the current increases remarkably in magnitude at a bias voltage of 10 V compared with ZnO NP channels without the adsorption of PBS. The current decreases in magnitude with increasing number of moles of added glucose. When 2.5 x 10(-12) moles of glucose are adsorbed on the PBS-adsorbed channels, the current in the channels at 10 V decreases in magnitude from 4.7 mu A to 600 nA. The enzyme-free glucose sensors can detect 5 x 10(-13) moles of glucose in air at room temperature. (C) 2011 Elsevier B.V. All rights reserved.
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