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Poly(phenosafranin)-functionalized single-walled carbon nanotube as nanocomposite electrocatalysts: Fabrication and electrocatalysis for NADH oxidation
Saleh, Farhana S.1; Okajima, Takeyoshi1; Kitamura, Fusao1; Mao, Lanqun2; Ohsaka, Takeo1
2011-05-01
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume56Issue:13Pages:4916-4923
AbstractWe report a new type of amperometric dihydronicotinamide adenine dinucleotide (NADH) biosensor based on a poly(phenosafranin) functionalized single-walled carbon nanotube (PPS-SWCNT) nanocomposite. This nanocomposite, which was fabricated on an edge-plane pyrolytic graphite (EPPG) electrode surface, was formed by electropolymerizing a phenosafranin (PS) monomer onto SWCNTs. The PPS-SWCNT composites were characterized by surface analysis using atomic force microscopy (AFM), scanning electron microscopy (SEM) and UV-vis techniques and by electrochemical measurements using cyclic voltammetry (CV) and rotating disk electrode voltammetry (RDEV). Both the SEM and AFM studies revealed the successful immobilization of PPS on the SWCNT, whereas the UV-vis study suggested a strong charge-transfer interaction between them. The CV and RDEV results indicated that PPS-SWCNTs were able to mediate the oxidation of NADH effectively, with a remarkable decrease in overpotential by ca. 720 mV compared with the bare EPPG and with 10 times higher current than that at the PPS/EPPG electrode, (i.e., the catalytic reaction rate constant was estimated to be 3.36 x 10(5) M-1 s(-1)). This nanocomposite electrode was found to possess excellent characteristics as an amperometric NADH sensor including a low detection potential (0.0 V vs. Ag|AgCl|KCl(sat.)), rapid response (less than 2 s), low detection limit (10 nM), high sensitivity (576 mu A cm(-2) mM(-1)), high selectivity and reasonable stability. This new type of edge-plane-based electrochemical platform with a high surface area and catalytic activity offers great promise for creating a potentially alternative class of nanostructure electrodes for biosensing, biofuel cells and energy-conversion applications. (C) 2011 Elsevier Ltd. All rights reserved.
KeywordPhenosafranin Electrochemical Polymerization Nadh Swcnts Electrocatalysis
DOI10.1016/j.electacta.2011.02.011
Indexed BySCI
Language英语
WOS IDWOS:000291524000030
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72912
Collection中国科学院化学研究所
Corresponding AuthorOhsaka, Takeo
Affiliation1.Tokyo Inst Technol, Dept Elect Chem, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan
2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Saleh, Farhana S.,Okajima, Takeyoshi,Kitamura, Fusao,et al. Poly(phenosafranin)-functionalized single-walled carbon nanotube as nanocomposite electrocatalysts: Fabrication and electrocatalysis for NADH oxidation[J]. ELECTROCHIMICA ACTA,2011,56(13):4916-4923.
APA Saleh, Farhana S.,Okajima, Takeyoshi,Kitamura, Fusao,Mao, Lanqun,&Ohsaka, Takeo.(2011).Poly(phenosafranin)-functionalized single-walled carbon nanotube as nanocomposite electrocatalysts: Fabrication and electrocatalysis for NADH oxidation.ELECTROCHIMICA ACTA,56(13),4916-4923.
MLA Saleh, Farhana S.,et al."Poly(phenosafranin)-functionalized single-walled carbon nanotube as nanocomposite electrocatalysts: Fabrication and electrocatalysis for NADH oxidation".ELECTROCHIMICA ACTA 56.13(2011):4916-4923.
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