pH sensing by single and multi-layer hydrogel coated Fiber Bragg Grating

In this paper we show a novel chemo-mechanical-optical sensing mechanism in single and multi-layer hydrogel coated Fiber Bragg Grating (FBG) and demonstrate specific application in pH activated processes. The sensing device is based on the ionizable monomers inside the hydrogel which reversibly diss...

Full description

Saved in:
Bibliographic Details
Main Authors: Shivananju, B.N., Priydarshi, Manish Kr, Roy Mahapatra, D., Hegde, G.M., Asokan, S.
Format: Conference Proceeding
Language:English
Subjects:
Abstracts
Degradation
Fiber Bragg Grating
hydrogel coated
Lead
Mechanical variables measurement
Monitoring
Optical fiber sensors
pH sensing
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper we show a novel chemo-mechanical-optical sensing mechanism in single and multi-layer hydrogel coated Fiber Bragg Grating (FBG) and demonstrate specific application in pH activated processes. The sensing device is based on the ionizable monomers inside the hydrogel which reversibly dissociates as a function of the pH and consequently resulting in osmotic pressure difference between the gel and the solution. This pressure gradient causes the hydrogel to deform which in turn induces secondary strain on the FBG sensor resulting in shift in the Bragg wavelength. We also report on the sensitivity factor of single and multilayer hydrogel coated FBG at various different pH.
DOI:10.1109/ISPTS.2012.6260883