Enhanced Sensitivity of Surface Plasmon Resonance Biosensor Functionalized with Doped Polyaniline Composites for the Detection of Low-Concentration Acetone Vapour

Usman, F. and Dennis, J.O. and Seong, K.C. and Ahmed, A.Y. and Ferrell, T.L. and Fen, Y.W. and Sadrolhosseini, A.R. and Ayodele, O.B. and Meriaudeau, F. and Saidu, A. (2019) Enhanced Sensitivity of Surface Plasmon Resonance Biosensor Functionalized with Doped Polyaniline Composites for the Detection of Low-Concentration Acetone Vapour. Journal of Sensors, 2019. ISSN 1687725X

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Abstract

PANI/chitosan composite and a ternary composite comprising of PANI, chitosan, and reduced graphene oxide have been successfully synthesised and characterised using FTIR and UV-VIS spectroscopy. Optical constants of the composites were extracted from the UV-VIS spectra. The extracted parameters were applied in the simulation of a surface plasmon resonance (SPR) biosensor functionalised with PANI/chitosan and ternary composites. The aim was to explore the applicability of the composite-based SPR sensor in the detection of low-concentration acetone vapour within the range of 1.8 ppm-5.0 ppm for diabetes monitoring and screening. The functionalization of the SPR sensor with the PANI/chitosan and the ternary composites shows promising application of the sensor in the detection of acetone vapour at a low concentration down to less than 0.5 ppm. The maximum sensitivity values of about 60 and 180 degree/refractive index change were observed for PANI/chitosan and ternary composite sensing layers, respectively, in comparison with the bare gold-based SPR which shows no response up to 10 ppm concentration of acetone vapour in air. In addition, the two sensing layers show good selectivity to acetone vapour compared to ethanol, methanol, and ammonia. The response in the case of ternary composite shows better linearity with a correlation coefficient of 1.0 compared to PANI/chitosan- and gold-based SPR layers with 0.9999 and 0.9997, respectively. © 2019 Fahad Usman et al.

Item Type: Article
Additional Information: cited By 23
Uncontrolled Keywords: Acetone; Ammonia; Biosensors; Fourier transform infrared spectroscopy; Gold; Graphene; Plasmons; Polyaniline; Ultraviolet visible spectroscopy, Correlation coefficient; Enhanced sensitivity; Functionalizations; Maximum sensitivity; Reduced graphene oxides; Surface plasmon resonance biosensor; Ternary composites; UV-vis spectroscopy, Surface plasmon resonance
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 10 Nov 2023 03:26
Last Modified: 10 Nov 2023 03:26
URI: https://khub.utp.edu.my/scholars/id/eprint/11986

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