Incorporation of surface plasmon resonance with novel valinomycin doped chitosan-graphene oxide thin film for sensing potassium ion.

Author(s) Zainudin, A.Azri; Fen, Y.Wing; Yusof, N.Azah; Al-Rekabi, S.Hmoud; Mahdi, M.Adzir; Omar, N.Alia Sheh
Journal Spectrochim Acta A Mol Biomol Spectrosc
Date Published 2018 Feb 15

In this study, the combination of novel valinomycin doped chitosan-graphene oxide (C-GO-V) thin film and surface plasmon resonance (SPR) system for potassium ion (K+) detection has been developed. The novel C-GO-V thin film was deposited on the gold surface using spin coating technique. The system was used to monitor SPR signal for K+ in solution with and without C-GO-V thin film. The K+ can be detected by measuring the SPR signal when C-GO-V thin film is exposed to K+ in solution. The sensor produces a linear response for K+ ion up to 100ppm with sensitivity and detection limit of 0.00948°ppm-1 and 0.001ppm, respectively. These results indicate that the C-GO-V film is high potential as a sensor element for K+ that has been proved by the SPR measurement.

DOI 10.1016/j.saa.2017.10.013
ISSN 1873-3557
Citation Spectrochim Acta A Mol Biomol Spectrosc. 2018;191:111115.

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