Low-temperature detection of acetone gas using ZnO-TiO2 nanorod on tapered multimode fiber decorated with Au-Pd thin films

Roslan, Farah Sakiinah and Saidin, Norazlina and M. Thirunavakkarasu, Punithavathi and Ali Khan, Abdul and Yaacob, Mohd Hanif and Hasbullah, Nurul Fadzlin (2023) Low-temperature detection of acetone gas using ZnO-TiO2 nanorod on tapered multimode fiber decorated with Au-Pd thin films. Optical Fiber Technology. ISSN 10685200

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Abstract

This paper presents the influence of titanium dioxide (TiO2) as a catalyst to the zinc oxide (ZnO) nanorods coated on the tapered MMF fiber utilized as a sensing layer for the detection of acetone gas at low temperatures. To enhance the sensitivity of the sensor ZnO-TiO2 nanorods were decorated with Au-Pd film. Hydrothermal method was used to synthesize the ZnO nanorods while TiO2 powder was incorporated by using a simple doping procedure during fabrication. The decoration of the Au-Pd thin films is integrated with the ZnO-TiO2 by using DC sputtering method. The ZnO doped with 15 mM TiO2 shows a strong and significant peak based on XRD analysis which can be indexed to the hexagonal phase of ZnO. A few globular structures of TiO2 were randomly distributed as observed by the SEM image. Four different fiber sensing layers were prepared with respect to 10mM ZnO precursor; ZnO nanorods (ZN), ZnO nanorods decorated with Au-Pd thin films (ZNAP), ZnO-15 mM TiO2 nanorods (ZTN) and ZnO-15 mM TiO2 nanorods decorated with Au-Pd thin films (ZTNAP). The spectrometry setup was used to measure the response of the sensor toward different concentrations of acetone gas interms of intensity with respect to its wavelength. Notable output intensity responses were observed for ZTNAP in terms of sensitivity and standard deviation towards various acetone concentrations while the repeatability curve showed a high response of acetone gas at 10,000 ppm. All experiments were performed at the low temperature of 87 ◦C.

Item Type:	Article (Journal)
Additional Information:	108751/5653
Uncontrolled Keywords:	Zinc oxide-titanium dioxide (ZnO-TiO2); Au-Pd; ZnO nanorod; TiO2 dopant; Acetone gas
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Lasers
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User:	Mr Mohamad Ridzuan Musa
Date Deposited:	08 Dec 2023 15:47
Last Modified:	08 Dec 2023 15:47
URI:	http://irep.iium.edu.my/id/eprint/108751

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