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Reference type: Journal
Authors: Pesavento M, De Maria L, Merli D, Marchetti S, Zeni L, Cennamo N
Article Title: Towards the development of cascaded surface plasmon resonance POF sensors exploiting gold films and synthetic recognition elements for detection of contaminants in transformer oil.
Publication date: 2017
Journal: Sensing and Bio-Sensing Research
Volume: 13
Page numbers: 128-135.
DOI: 10.1016/j.sbsr.2017.01.003
Alternative URL: http://www.sciencedirect.com/science/article/pii/S2214180417300132

Abstract: The possibility of developing a multichannel optical chemical sensor, based on molecularly imprinted polymers (MIPs) and surface plasmon resonance (SPR) in a D-shaped multimode plastic optical fiber (POF), is presented by two cascaded SPR-POF-MIP sensors with different thicknesses of the gold layer. The low cost, the high selectivity and sensitivity of the SPR-POF-MIP platforms and the simple and modular scheme of the optical interrogation layout make this system a potentially suitable on-line multi-diagnostic tool. As a proof of principle, the possibility of simultaneous determination of two important analytes, dibenzyl disulfide (DBDS) and furfural (2-FAL), in power transformer oil was investigated. Their presence gives useful indication of underway corrosive or ageing processes in power transformers, respectively. Preliminarily, the dependence of the performance of the D-shaped optical platform on the gold film thickness has been studied, comparing two platforms with 30 nm and 60 nm thick gold layers. It has been found that the resonance wavelengths are different on platforms with gold layer of different thickness, furthermore when MIPs are present on the gold as receptors, the performances of the platforms are similar in the two considered sensors
Template and target information: dibenzyl disulfide, DBDS, furfural, 2-FAL
Author keywords: Cascaded multianalyte detection, surface plasmon resonance, dibenzyl disulfide, furfural (furan-2-carbaldehyde), Molecularly imprinted polymers, plastic optical fibers

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