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Overoxidized polypyrrole film directed single-walled carbon nanotubes immobilization on glassy carbon electrode and its sensing applications

Li, Yongxin and Wang, Po and Wang, Lun and Lin, Xiangqin (2007) Overoxidized polypyrrole film directed single-walled carbon nanotubes immobilization on glassy carbon electrode and its sensing applications. BIOSENSORS & BIOELECTRONICS, 22 (12, Sp. Iss. SI). pp. 3120-3125. ISSN 0956-5663

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleUR...

Abstract

In this paper, the films of overoxidized polypyrrole (PPyox) directed single-walled carbon nanotubes (SWNTs) have been electrochemically coated onto glassy carbon electrode (GCE). Electroactive monomer pyrrole was added into the solution containing sodium dodecyl sulfate (SDS) and SWNTs. Then, electropolymerization was proceeded at the surface of GCE, and a novel kind of conducting polymer/carbon nanotubes (CNTs) composite film with the orientation of CNTs were obtained correspondingly. Finally, this obtained polypyrrole (PPY)/SWNTs film modified GCE was oxidized at a potential of +1.8 V. It can be found that this proposed PPyox/SWNTs composite film modified GCE exhibited excellent electrocatalytie properties for some species such as nitrite, ascorbic acid (AA), dopamine (DA) and uric acid (UA), and could be used as a new sensor for practical applications. Compared with previous CNTs modified electrodes, SWNTs were oriented towards the outside of modified layer by PPyox and SDS, which made the film easily conductive. Moreover, this proposed film modified electrode was more stable, selective and applicable. (c) 2007 Elsevier B.V. All rights reserved.

Item Type:Article
Uncontrolled Keywords:overoxidized polypyrrole; carbon nanotubes; electrocatalytic oxidation; glassy carbon electrode
Subjects:Physical Science > Nanoelectronics
Material Science > Nanochemistry
ID Code:2177
Deposited By:M T V
Deposited On:24 Dec 2008 15:10
Last Modified:24 Dec 2008 15:10

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