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Author: search.filters.author.Onlaor, KorakotSubject: search.filters.subject.Thin film

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    Effect of Annealing Temperature on Properties of Tin Oxide Films Prepared by Electrostatic Deposition Technique
    (2018-01-01)
    Onlaor, Korakot
    ;
    Tunhoo, Benchapol
    ;
    Thiwawong, Thutiyaporn
    In this work, tin oxide films were prepared by electrostatic spray deposition technique. The effect of post annealing temperature on properties of prepare film was performed. The structural, surface morphology and optical properties of tin oxide films were characterized by X-ray diffraction, field-emission scanning electron microscope, and UV-Visible spectrophotometer. The crystalline size is found to increase with increase the annealing temperature. Moreover, the effect of annealing temperature on physical properties of tin oxide films has been performed.
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    A humidity sensor based on iron oxide films prepared by spin coating process
    (2017-01-01)
    Songkeaw, Potiyan
    ;
    Onlaor, Korakot
    ;
    Tunhoo, Benchapol
    In present work, iron oxide films were prepared by spin coating technique. The effect of annealing temperature on the properties of films was investigated. The structural and surface morphology properties of films have been performed by X-ray diffraction, Fourier transform infrared spectroscopy, and field-emission scanning electron microscope. To fabricate the humidity sensor device, the iron oxide film was spun on indium tin oxide transparent electrode. The sensor exhibited the humidity response in the range of 23-93% RH. The mechanisms and equivalent circuit models of sensor can be explained by complex impedance measurement.
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    Effect of anodizing voltage on anodic titanium dioxide (ATO) growth based on an ethylene glycol solution containing NH4F
    (2016-01-01)
    Mangkornkarn, Chayangkoon
    ;
    Samransuksamer, Benjarong
    ;
    Horprathum, Mati
    ;
    Eiamchai, Pitak
    ;
    Eiad-Ua, Apiluck
    We reported on the influence of applied voltage on the surface morphology of anodic titanium dioxide (ATO) thin films. At first, titanium (Ti) thin films were prepared by DC-magnetron sputtering for use as a base material in the anodization process. The titanium dioxide (TiO<inf>2</inf>) nanoporous ATO was fabricated by the anodization process from the Ti thin film, with different applied voltages from 20 V to 60 V in an electrolyte based on an ethylene glycol containing NH<inf>4</inf>F. Pore size distribution of ATO thin films can be varied from 20-50 nm by increasing the applied voltage, while the thickness of the film also increases. In addition, to observe the effect of time, the optimal condition of anodizing voltage was studied by increasing the anodizing time. The results clearly showed the nanoporous ATO over the films and the thickness of the nanoporous ATO is approximately 260 nm.