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Modification strategy of screen-printed carbon electrode with functionalized multi-walled carbon nanotube and chitosan matrix for biosensor development

Azri, Farah Asilah and Sukor, Rashidah and Hajian, Reza and Yusof, Nor Azah and Abu Bakar, Fatimah and Selamat, Jinap (2017) Modification strategy of screen-printed carbon electrode with functionalized multi-walled carbon nanotube and chitosan matrix for biosensor development. Asian Journal of Chemistry, 29 (1). pp. 31-36. ISSN 0970-7077; ESSN: 0975-427X

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Abstract

Biosensor is a rapid technique to determine the analyte based on the incorporation of bioactive materials with physio-chemical transducing element. In this work, multi-walled carbon nanotube (MWCNT) was functionalized with carboxylic groups and mixed with chitosan (CS) prior to drop casting on screen-printed carbon electrode (SPCE). The acid treatment of multi-walled carbon nanotube by using mixture of H2SO4 and HNO3 in 3:2 ratio was better compared to treatment by piranha solution, in terms of carboxylic group attachment and capacitance effect on the current response. The functionalized carbon nanotubes were characterized by using fourier transform infrared spectroscopy, field emission scanning electron microscopy and cyclic voltammetry analysis. Few modification parameters have been optimized to maximize the performance of working electrode including ratio of MWCNT:CS, coating volume and drying method. The addition of MWCNT/CS matrix on the screen-printed carbon electrode greatly enhanced the electron transfer rate and increased the electrode active surface area for further immobilization of bioactive components.

Item Type:Article
Keyword:Screen-printed carbon electrode; Multi-walled carbon nanotube; Chitosan; Biosensor
Faculty or Institute:Faculty of Food Science and Technology
Institute of Advanced Technology
Institute of Tropical Agriculture
Publisher:Asian Publication Corporation
ID Code:51980
Deposited By: Nabilah Mustapa
Deposited On:04 May 2017 12:44
Last Modified:04 May 2017 12:44

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