Fiber optic pH sensor with self-assembled multilayer nanocoatings on tilted FBG

L. Y. Shao; M. J. Yin; Hwa Yaw Tam; J. Albert

doi:10.1117/12.974898

Fiber optic pH sensor with self-assembled multilayer nanocoatings on tilted FBG

L. Y. Shao, M. J. Yin, Hwa Yaw Tam, J. Albert

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

2 Citations (Scopus)

Abstract

A novel fiber optic pH sensor is experimentally demonstrated by coating multilayers of poly(acrylic acid) (PAA) and poly(diallyldimethylammonium chloride) (PDDA) on a tilted fiber Bragg grating (TFBG) with the layer-by-layer (LbL) electrostatic self-assembly method. The utilization of PDDA/PAA pH sensitive polymeric coating presents a variation of the thickness with the pH of the solution, which introduces the wavelength shift and transmission change in the spectrum of TFBG. Using fast Fourier transform (FFT) analysis on a selected bandwidth of the transmission spectrum, it is found that the peak amplitude of the dominant spectral fringes increases with the increasing pH value with an near-linear sensitivity of 117 arbitrary unit (a.u.)/pH unit (in the range of pH 4.66 to pH 6.02). The dynamic response of the sensor also has been studied (10 s rise time and 18 s fall time).

Original language	English
Title of host publication	22nd International Conference on Optical Fiber Sensors
Volume	8421
DOIs	https://doi.org/10.1117/12.974898
Publication status	Published - 1 Dec 2012
Event	22nd International Conference on Optical Fiber Sensors - Beijing, China Duration: 15 Oct 2012 → 19 Oct 2012

Conference

Conference	22nd International Conference on Optical Fiber Sensors
Country/Territory	China
City	Beijing
Period	15/10/12 → 19/10/12

Keywords

Fourier transform
Layer by layer
pH sensor
Polymeric coatings
Self-assembly
Tilted fiber Bragg grating

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

More information

10.1117/12.974898

Cite this

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title = "Fiber optic pH sensor with self-assembled multilayer nanocoatings on tilted FBG",

abstract = "A novel fiber optic pH sensor is experimentally demonstrated by coating multilayers of poly(acrylic acid) (PAA) and poly(diallyldimethylammonium chloride) (PDDA) on a tilted fiber Bragg grating (TFBG) with the layer-by-layer (LbL) electrostatic self-assembly method. The utilization of PDDA/PAA pH sensitive polymeric coating presents a variation of the thickness with the pH of the solution, which introduces the wavelength shift and transmission change in the spectrum of TFBG. Using fast Fourier transform (FFT) analysis on a selected bandwidth of the transmission spectrum, it is found that the peak amplitude of the dominant spectral fringes increases with the increasing pH value with an near-linear sensitivity of 117 arbitrary unit (a.u.)/pH unit (in the range of pH 4.66 to pH 6.02). The dynamic response of the sensor also has been studied (10 s rise time and 18 s fall time).",

keywords = "Fourier transform, Layer by layer, pH sensor, Polymeric coatings, Self-assembly, Tilted fiber Bragg grating",

author = "Shao, {L. Y.} and Yin, {M. J.} and Tam, {Hwa Yaw} and J. Albert",

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language = "English",

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T1 - Fiber optic pH sensor with self-assembled multilayer nanocoatings on tilted FBG

AU - Shao, L. Y.

AU - Yin, M. J.

AU - Tam, Hwa Yaw

AU - Albert, J.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - A novel fiber optic pH sensor is experimentally demonstrated by coating multilayers of poly(acrylic acid) (PAA) and poly(diallyldimethylammonium chloride) (PDDA) on a tilted fiber Bragg grating (TFBG) with the layer-by-layer (LbL) electrostatic self-assembly method. The utilization of PDDA/PAA pH sensitive polymeric coating presents a variation of the thickness with the pH of the solution, which introduces the wavelength shift and transmission change in the spectrum of TFBG. Using fast Fourier transform (FFT) analysis on a selected bandwidth of the transmission spectrum, it is found that the peak amplitude of the dominant spectral fringes increases with the increasing pH value with an near-linear sensitivity of 117 arbitrary unit (a.u.)/pH unit (in the range of pH 4.66 to pH 6.02). The dynamic response of the sensor also has been studied (10 s rise time and 18 s fall time).

AB - A novel fiber optic pH sensor is experimentally demonstrated by coating multilayers of poly(acrylic acid) (PAA) and poly(diallyldimethylammonium chloride) (PDDA) on a tilted fiber Bragg grating (TFBG) with the layer-by-layer (LbL) electrostatic self-assembly method. The utilization of PDDA/PAA pH sensitive polymeric coating presents a variation of the thickness with the pH of the solution, which introduces the wavelength shift and transmission change in the spectrum of TFBG. Using fast Fourier transform (FFT) analysis on a selected bandwidth of the transmission spectrum, it is found that the peak amplitude of the dominant spectral fringes increases with the increasing pH value with an near-linear sensitivity of 117 arbitrary unit (a.u.)/pH unit (in the range of pH 4.66 to pH 6.02). The dynamic response of the sensor also has been studied (10 s rise time and 18 s fall time).

KW - Fourier transform

KW - Layer by layer

KW - pH sensor

KW - Polymeric coatings

KW - Self-assembly

KW - Tilted fiber Bragg grating

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U2 - 10.1117/12.974898

DO - 10.1117/12.974898

M3 - Conference article published in proceeding or book

SN - 9780819491039

VL - 8421

BT - 22nd International Conference on Optical Fiber Sensors

T2 - 22nd International Conference on Optical Fiber Sensors

Y2 - 15 October 2012 through 19 October 2012

ER -

Fiber optic pH sensor with self-assembled multilayer nanocoatings on tilted FBG

Abstract

Conference

Keywords

ASJC Scopus subject areas

More information

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