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Flexible electrochemical biosensors based on O-2 plasma functionalized MWCNT

Authors
Lee, Jun-YongPark, Eun-JinLee, Cheol-JinKim, Soo-WonPak, James JunghoMin, Nam Ki
Issue Date
29-May-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
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/120021
DOI
10.1016/j.tsf.2009.01.130
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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