Agarose gel coated glass substrate for formaldehyde sensing application

Jali, Mohd Hafiz and Abdul Rahim, Hazli Rafis and Md Johari, Md Ashadi and Ahmad, Aminah and Baharom, Mohamad Faizal and MALEK FAISAL, NUR NADIRA and Adnan Zain, Huda and Wadi Harun, Sulaiman (2022) Agarose gel coated glass substrate for formaldehyde sensing application. Przeglad Elektrotechniczny, 98 (8). pp. 95-99. ISSN 0033-2097

Text AGAROSE GEL COATED GLASS SUBSTRATE FOR FORMALDEHYDE SENSING.PDF - Published Version Restricted to Repository staff only Download (741kB)

Abstract

This paper demonstrated an intensity modulation detection system employing agarose gel coated on the glass substrate for formaldehyde sensing application. The objectives of this work is to develop a simple and low cost formaldehyde sensor using commercially available microscope glass substrate, coating material and data acquisition unit. The glass substrate was coated with agarose gel using low temperature synthesis method which has superiority in term of high porosity and capable to absorb molecule around it. The formaldehyde detection is based on the change in refractive index (RI) of the agarose gel as a coating material. The RI change of the coating materials will modulate the output light intensity when the concentration level of the formaldehyde varies. This is due to the intensity of the light weakening by absorption and scattering when light propagated through the sensing material. A significant response to formaldehyde concentrations was observed with the output voltage reduced linearly from 1.1V to 0.4V. The sensitivity and the linearity of the proposed sensor improve by a factor of 1.02 and 1.03 respectively as compared to uncoated glass substrate. Moreover, it performs better in term of stability, hysteresis and time response. The proposed formaldehyde sensor avoid utilization of costly optical sensor setup based on laser source which are not feasible for large scale production. Based on the experiment results, the proposed sensor has a good potential as a formaldehyde sensor which is essential for food, health and environmental sector.

Item Type:	Article
Uncontrolled Keywords:	Formaldehyde, Agarose gel, Glass substrate
Divisions:	Faculty of Electrical Engineering
Depositing User:	WIZANA ABD JALIL
Date Deposited:	15 Dec 2023 16:20
Last Modified:	20 Dec 2023 08:28
URI:	http://eprints.utem.edu.my/id/eprint/27067
Statistic Details:	View Download Statistic

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