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Flexible electrochemical biosensors based on O-2 plasma functionalized MWCNT
- Issue Date
- 29-5월-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- MWCNTs; Plasma-treatment; Flexible biosensors
- Citation
- THIN SOLID FILMS, v.517, no.14, pp.3883 - 3887
- Indexed
- SCIE
SCOPUS
- Journal Title
- THIN SOLID FILMS
- Volume
- 517
- Number
- 14
- Start Page
- 3883
- End Page
- 3887
- ISSN
- 0040-6090
- Abstract
- A flexible glucose sensor is fabricated using O-2 plasma-functionalized multiwalled carbon nanotube (MWCNT) films on polydimethylsiloxane (PDMS) substrates and its performance is electrochemically characterized. After enzyme immobilization, the GOD/MWCNT/Au/PDMS electrode exhibits a sensitivity of 18.15 mu A mm(-2)mM(-1) and a detection limit of 0.01 mM (signal to noise ratio was about 3). This high sensitivity may be attributed to a large enzyme loading and a higher electrocatalytic activity and electron transfer exhibited by O-2 plasma-functionalized CNTs than the pristine CNT, due to some oxygen-contained groups present on the O-2 plasma-functionalized CNT surface, which has been verified by XPS spectrum. (C) 2009 Elsevier B.V. All rights reserved.
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