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A simple small size and low cost sensor based on surface plasmon resonance for selective detection of Fe(III)

Articolo
Data di Pubblicazione:
2014
Abstract:
A simple, small size, and low cost sensor based on a Deferoxamine Self Assembled Monolayer (DFO-SAM) and Surface Plasmon Resonance (SPR) transduction, in connection with a Plastic Optical Fiber (POF), has been developed for the selective detection of Fe(III). DFO-SAM sensors based on appropriate electrochemical techniques can be frequently found in the scientific literature. In this work, we present the first example of a DFO-SAM sensor based on SPR in an optical fiber. The SPR sensing platform was realized by removing the cladding of a plastic optical fiber along half the circumference, spin coating a buffer of Microposit S1813 photoresist on the exposed core, and finally sputtering a thin gold film. The hydroxamate siderophore deferoxamine (DFO), having high binding affinity for Fe(III), is then used in its immobilized form, as self-assembled monolayer on the gold layer surface of the POF sensor. The results showed that the DFO-SAM-POF-sensor was able to sense the formation of the Fe(III)/DFO complex in the range of concentrations between 1 μm and 50 μm with a linearity range from 0 to 30 μm of Fe(III). The selectivity of the sensor was also proved by interference tests.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
plastic optical fiber; Surface plasmon resonance; deferoxamine; self-assembled monolayer; iron(III)
Elenco autori:
Cennamo, N.; Alberti, Giancarla; Pesavento, Maria; D'Agostino, Girolamo; Quattrini, Fabrizio; Biesuz, Raffaela; Zeni, L.
Autori di Ateneo:
ALBERTI GIANCARLA
BIESUZ RAFFAELA
Link alla scheda completa:
https://iris.unipv.it/handle/11571/850445
Pubblicato in:
SENSORS
Journal
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URL

https://www.mdpi.com/1424-8220/14/3/4657
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