High sensitivity near-field opto-chemical sensors based on SnO<sub>2</sub> particle layers

M. Consales; M. Pisco; A. Buosciolo; R. Viter; V. Smyntyna; A. Cutolo; M. Giordano; A. Cusano

doi:10.1117/12.738425

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2 July 2007 High sensitivity near-field opto-chemical sensors based on SnO₂ particle layers

M. Consales, M. Pisco, A. Buosciolo, R. Viter, V. Smyntyna, A. Cutolo, M. Giordano, A. Cusano

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Proceedings Volume 6619, Third European Workshop on Optical Fibre Sensors; 66191G (2007) https://doi.org/10.1117/12.738425
Event: Third European Workshop on Optical Fibre Sensors, 2007, Napoli, Italy

Abstract

In this work, the surprising sensing performances of opto-chemical sensors based on SnO₂ particles layers against chemical pollutants either in air and water environment, at room temperature, are reported. The Electrostatic Spray Pyrolysis (ESP) method has been used to deposit the sensing coatings upon the distal end of standard fibers. This technique allows the fabrication of SnO₂ layers composed of micron and sub-micron dimensions able to locally modify the profile of the optical near-field collected in the close proximity of the fiber tip. Such layers morphology leads to strong surface interactions between sensing coatings, analyte molecules and the evanescent contribute of the field, resulting in an excellent sensors sensitivity against chemical pollutants, even at room temperature.

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M. Consales, M. Pisco, A. Buosciolo, R. Viter, V. Smyntyna, A. Cutolo, M. Giordano, and A. Cusano "High sensitivity near-field opto-chemical sensors based on SnO₂ particle layers", Proc. SPIE 6619, Third European Workshop on Optical Fibre Sensors, 66191G (2 July 2007); https://doi.org/10.1117/12.738425

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