Optical fiber pH sensor based on gold nanoparticles into polymeric coatings

A. B. Socorro; Pedro J. Rivero; M. Hernaez; J. Goicoechea; I. R. Matias; F. J. Arregui

doi:10.1117/12.2179970

21 May 2015 Optical fiber pH sensor based on gold nanoparticles into polymeric coatings

A. B. Socorro, Pedro J. Rivero, M. Hernaez, J. Goicoechea, I. R. Matias, F. J. Arregui

Proceedings Volume 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems; 95171W (2015) https://doi.org/10.1117/12.2179970
Event: SPIE Microtechnologies, 2015, Barcelona, Spain

Abstract

A pH optical fiber sensor based on electromagnetic resonances generated in a waveguide-nanocoating interface is presented here. The incorporation of gold nanoparticles (AuNPs) into polymeric thin films has been deeply studied and the deposition of these thin-films onto an optical fiber core has been performed in order to obtain a resonance-based optical fiber device. The presence of both the metal nanoparticles and the polymers in the coating allows the generation of two different electromagnetic resonances: localized surface plasmon resonance (LSPR) and lossy mode resonance (LMR). These phenomena can be simultaneously observed in the transmitted spectrum. The resultant device has shown a high sensitivity to pH changes from pH 4.0 to pH 6.0, with a large dynamical range and a very fast response.

Citation Download Citation

A. B. Socorro, Pedro J. Rivero, M. Hernaez, J. Goicoechea, I. R. Matias, and F. J. Arregui "Optical fiber pH sensor based on gold nanoparticles into polymeric coatings", Proc. SPIE 9517, Smart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems, 95171W (21 May 2015); https://doi.org/10.1117/12.2179970

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