Abstract—Electrical conductive and water dispersive carbon nanotubes were firstly prepared by admicellar polymerization for using to improve biosensor electrodes. Copolymer of polyaniline (PANi) and polyvinyl acetate (PVAc) was synthesized as a nanofilm coated on the surface of carbon nanotubes (CNTs). FT-IR was used to characterize the copolymer film coated on the surface of CNTs. SEM and TEM were also used for morphology observation of the admicellar-modified CNTs on the surface. Lastly glassy carbon electrode samples prepared from the modified CNTs were fabricated for testing the sensibility of the electrode by cyclic voltammetry (CV). The results showed that the modified CNTs by PANi-co-PVAc coating were successfully prepared. From cyclic voltammetry test of ascorbic acid (AA) analysis, the results were found that the biosensor electrodes using the PANi-co-PVAc modified CNTs provided higher sensitivity for measuring AA at low concentration. This work could imply that adding the PANi-co-PVAc modified CNTs in biosensor electrodes have the potential for application in biosensor.
Index Terms—Modified carbon nanotubes, admicellar polymerization, surface modification, biosensor electrodes.
Thirawudh Pongprayoon is with the Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, 10800, Thailand (e-mail: thirawudh.p@eng.kmutnb.ac.th).
Hsiao-Chen Liu was with the Department of Chemical Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok (KMUTNB), she is now with in the rubber company, Bangkok, 10800, Thailand.
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Cite: Thirawudh Pongprayoon and Hsiao-Chen Liu, "Modified Carbon Nanotubes for Improvement of Biosensor Electrodes," International Journal of Chemical Engineering and Applications vol. 11, no. 1, pp. 1-5, 2020.
