NDLI: Design of pH Sensors in Long-Period Fiber Gratings Using Polymeric Nanocoatings

Content Provider	IEEE Xplore Digital Library
Author	Corres, J.M. Matias, I.R. del Villar, I. Arregui, F.J.
Copyright Year	2001
Abstract	In this paper, two different pH sensors based on the deposition of nanometric scale polymeric films onto the surface of a long-period fiber grating (LPFG) have been studied and compared. An electrostatic self-assembled (ESA) method has been used to create sensitive films with an optimal overlay thickness. Two types of sensors have been designed: The first one is based on polyallylamine hydrochloride (PAH), polyacrylic acid (PAA), and the second one was done incorporating the pigment Prussian blue (PB) in the PAH/PAA matrix. A theoretical model of multilayer cylindrical waveguides based on coupled-mode theory has been used to predict the position of the attenuation bands as a function of the overlay thickness. Both sensors were tested and compared in terms of sensitivity and response time. A faster response was obtained with the introduction of PB particles in the polymeric matrix. Linear sensors in the pH range 4-7 were obtained, showing good repeatability and high sensitivity
Sponsorship	IEEE Sensors Council
Starting Page	455
Ending Page	463
Page Count	9
File Size	1085423
File Format	PDF
ISSN	1530437X
Volume Number	7
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber sensors Fiber gratings Polymer films Transmission line matrix methods Electrostatics Self-assembly Pigmentation Predictive models Nonhomogeneous media Waveguide theory pH sensor Coupled-mode analysis electrostatic self-assembly (ESA) long-period fiber gratings nanophotonics nanostructured materials optical fiber sensors
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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