Work

A sensitive fibre optic pH sensor using multiple sol-gel coatings

Year: 2001

Type: article

Abstract: The fabrication and characterization of a fibre optic pH sensor based on evanescent wave absorption is presented. The unclad portion of a multi-mode optical fibre is coated with a pH sensitive dye, which is immobilized by the sol-gel route. The sensitivity of the device has been found to increase when multiple sol-gel coatings are used as the sensing region. The dynamic range and the temporal response of the sensor are investigated for two different dyes, namely bromocresol purple and bromocresol green. The performance of the device is evaluated in terms of the results obtained during actual measurements.

Source: Journal of Optics A Pure and Applied Optics

DOI: 10.1088/1464-4258/3/5/307

Authors: S Thomas Lee, Jose Gin, V P N Nampoori, C P G Vallabhan, N V Unnikrishnan, P Radhakrishnan

Institutions: Cochin University of Science and Technology, Mahatma Gandhi University, Mahatma Gandhi University

Language: English

Topic: Analytical Chemistry and Sensors

Subfield: Bioengineering

Field: Chemical Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: Nanyang Technological University, Mahatma Gandhi University

OpenAlex ID: W2130180717

FWCI: 2.447

Cites: 15

Cited by: 76

Related to: 10