The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas

There is great interest in gas sensing especially for toxic gases such as carbon monoxide. This paper reports the use of Langmuir-Blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas in nitrogen at room temperature. The detection was studied based on changes in the optic...

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Main Authors:	Muhamad Mat Salleh, A. S. Belal, Muhamad Yahaya
Format:	Article
Published:	Universiti Kebangsaan Malaysia 1997
Online Access:	http://journalarticle.ukm.my/3758/ http://journalarticle.ukm.my/3758/

id	ukm-3758
recordtype	eprints
spelling	ukm-37582012-03-19T03:18:35Z http://journalarticle.ukm.my/3758/ The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas Muhamad Mat Salleh, A. S. Belal , Muhamad Yahaya, There is great interest in gas sensing especially for toxic gases such as carbon monoxide. This paper reports the use of Langmuir-Blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas in nitrogen at room temperature. The detection was studied based on changes in the optical absorption and reflection of the film using a spectrophotometer and an optical fiber system, respectively. The absorption spectra of a 20 layers LB film decreased when exposed to 10, 100, 1000 ppm CO gas, and had fast recovery time when the gas flow was stopped. An optical fiber system consists of a laser diode as light source, a fiber reflectance probe, thin film sample on a reflecting mirror and a light detector was setup. Using this system it was found that the intensity of the reflected light increased when the film was exposed to the gas. The sensing sensitivity of the films increased after the films were annealed for one hour at 100°C. The result is explained using the atomic force microscope (AFM) images of the LB films taken before and after annealing. Universiti Kebangsaan Malaysia 1997-09 Article PeerReviewed Muhamad Mat Salleh, and A. S. Belal , and Muhamad Yahaya, (1997) The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas. Sains Malaysiana, 26 (3&4). pp. 99-107. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol26num3and4_1997/vol26num3and4_97page99-107.html
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Kebangasaan Malaysia
building	UKM Institutional Repository
collection	Online Access
description	There is great interest in gas sensing especially for toxic gases such as carbon monoxide. This paper reports the use of Langmuir-Blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas in nitrogen at room temperature. The detection was studied based on changes in the optical absorption and reflection of the film using a spectrophotometer and an optical fiber system, respectively. The absorption spectra of a 20 layers LB film decreased when exposed to 10, 100, 1000 ppm CO gas, and had fast recovery time when the gas flow was stopped. An optical fiber system consists of a laser diode as light source, a fiber reflectance probe, thin film sample on a reflecting mirror and a light detector was setup. Using this system it was found that the intensity of the reflected light increased when the film was exposed to the gas. The sensing sensitivity of the films increased after the films were annealed for one hour at 100°C. The result is explained using the atomic force microscope (AFM) images of the LB films taken before and after annealing.
format	Article
author	Muhamad Mat Salleh, A. S. Belal , Muhamad Yahaya,
spellingShingle	Muhamad Mat Salleh, A. S. Belal , Muhamad Yahaya, The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
author_facet	Muhamad Mat Salleh, A. S. Belal , Muhamad Yahaya,
author_sort	Muhamad Mat Salleh,
title	The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
title_short	The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
title_full	The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
title_fullStr	The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
title_full_unstemmed	The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
title_sort	use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas
publisher	Universiti Kebangsaan Malaysia
publishDate	1997
url	http://journalarticle.ukm.my/3758/ http://journalarticle.ukm.my/3758/
first_indexed	2023-09-18T19:39:40Z
last_indexed	2023-09-18T19:39:40Z
_version_	1777405505838252032

The use oflangmuir-blodgett films of hematin mixed with arachidic acid to detect carbon monoxide gas

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