Nano Archive

Nanocomposite of functionalized multiwall carbon nanotubes with nafion, nano platinum, and nano biosensing film for simultaneous determination of ascorbic acid, epinephrine, and uric acid

Yogeswaran, Umasankar and Thiagarajan, Soundappan and Chen, Shen-Ming (2007) Nanocomposite of functionalized multiwall carbon nanotubes with nafion, nano platinum, and nano biosensing film for simultaneous determination of ascorbic acid, epinephrine, and uric acid. ANALYTICAL BIOCHEMISTRY, 365 (1). pp. 122-131.

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Official URL: http://dx.doi.org/10.1016/j.ab.2007.02.034

Abstract

A unique bimetallic, nano platinum (Pt) with nano gold (Au) on nation (NF) incorporated with functionalized multiwall carbon nanotubes (f-MWCNTs) composite film (f-MWCNTs-NF-PtAu) was developed by the potentiostatic method. The composite film exhibits promising efficient catalytic activity towards the oxidation of mixture of biochemical compounds and simultaneous measurement of ascorbate anion, epinephrine and urate anion in aqueous buffer solution (pH 6.75). Both, the cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used for the measurement of electroanalytical properties of neurotransmitters by means of composite film modified electrodes. Well-separated voltammetric peaks were obtained for ascorbate, epinephrine and urate anions with the peak separations of 0.222 and 0.131 V. The composite film can also be produced on gold and transparent semiconductor indium tin oxide electrodes for different kinds of studies; such as electrochemical quartz crystal microbalance (EQCM), scanning electron microscopy (SEM), and atomic force microscopy (AFM). The incorporation of Pt and Au onto the f-MWCNTs-NF was revealed by the EQCM technique and the morphology of the film was studied using SEM, AFM and scanning electrochemical microscopy (SECM) techniques. Further, extensive studies were carried out using SECM for obtaining the surface current topographic images of composite film modified electrodes, and these indicated the presence of f-MWCNTs-NF-PtAu composite film on the electrode. (c) 2007 Elsevier Inc. All rights reserved.

Item Type:Article
Uncontrolled Keywords:multiwall carbon nanotubes; nano platinum; nano gold; composite film; modified electrodes; electrocatalysis; vitamin C; neurotransmitters
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanochemistry
ID Code:3218
Deposited By:Anuj Seth
Deposited On:14 Jan 2009 15:03
Last Modified:20 Jan 2009 16:02

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