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

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

9 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationSmart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems
EditorsJose L. Sanchez-Rojas, Riccardo Brama
PublisherSPIE
ISBN (Electronic)9781628416398
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventSmart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems - Barcelona, Spain
Duration: 4 May 20156 May 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9517
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSmart Sensors, Actuators, and MEMS VII; and Cyber Physical Systems
Country/TerritorySpain
CityBarcelona
Period4/05/156/05/15

Keywords

  • Optical fiber pH sensor
  • gold nanoparticles
  • localized surface plasmon resonance
  • lossy mode resonance

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