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Characterization of ZnO–TiO2-coated tapered fibres synthesized by a low-temperature hydrothermal method

Roslan, Farah Sakiinah and Saidin, Norazlina and Mat Harttar @ Mohd Hatta, Maziati Akmal and Hasbullah, Nurul Fadzlin and Thirunavakkarasu, Punithavathi M. (2022) Characterization of ZnO–TiO2-coated tapered fibres synthesized by a low-temperature hydrothermal method. Ukrainian Journal of Physical Optics, 23 (2). pp. 96-106. ISSN 1609-1833 E-ISSN 1816-2002

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We characterize ZnO-nanorod fibres doped with different concentrations of TiO2 powder which is introduced on the final stage of synthesis of ZnO nanorods, using a low-temperature hydrothermal method. Their surface morphology, size of particles, behaviour of crystallites and optical properties are investigated using techniques of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and an optical spectrometer. A presence of ZnO nanorods and a globular structure of TiO2 are confirmed by the SEM analysis. The EDS spectra and chemical-element mapping reveals a presence of Ti incorporated into a globular surface, along with Zn. The XRD analysis testifies that ZnO doped with TiO2 has a primary crystallite phase of ZnO. ZnO doped with 10 and 15 mM of TiO2 shows a stronger and more expressed peak corresponding to (002) and (011) planes, which implies improved crystallinity of ZnO–TiO2 system. Optical properties of ZnO–TiO2 are studied by measuring the intensity of halogen-source light transmitted through the fibres. The ZnO & 15 mM TiO2 fibre sample shows the lowest intensity of the transmitted light due to higher refractive index of a cladding layer coated under condition of high TiO2 concentration. The increased light leakage in such a fibre can improve sensitivity of a relevant sensor, especially a gas one.

Item Type: Article (Journal)
Uncontrolled Keywords: zinc oxide, titanium dioxide, doping, ZnO–TiO2, nanorods, hydrothermal method
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Lasers
T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Kulliyyah of Engineering > Department of Science
Depositing User: Norazlina Saidin
Date Deposited: 22 Nov 2022 09:36
Last Modified: 22 Nov 2022 09:36
URI: http://irep.iium.edu.my/id/eprint/101321

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