A Simple Small Size and Low Cost Sensor Based on Surface Plasmon Resonance for Selective Detection of Fe(III)

Sensors

Nunzio Cennamo²  Giancarla Alberti¹  Maria Pesavento¹  Girolamo Dɺgostino¹  Federico Quattrini¹  Raffaela Biesuz¹ 

[1] Department of Chemistry, University of Pavia, Via Taramelli 12, Pavia 27100, Italy; E-Mails:;Department of Industrial and Information Engineering, Second University of Naples, Via Roma 29, Aversa 81031, Italy; E-Mail:

关键词: plastic optical fiber;    surface plasmon resonance;    deferoxamine;    self-assembled monolayer;    iron(III);   

DOI  :  10.3390/s140304657

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.