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Author: search.filters.author.Mekla, Vatcharinkorn

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    Effect of UV-induce ozone treatment on physics and morphological properties of hydrothermally grown Ga-F-codoped ZnO nanostructure
    (2018-01-01)
    Mekla, Vatcharinkorn
    ;
    Boonyarattanakalin, Kanokthip
    The effects of ultraviolet ozone treatment (UVO treatment) on the physical and morphological structure of Ga/F co-doped Zn Onanorods. The ZnO seeding layers were prepared by sol-gel dip coating method based on zinc acetate dehydrate (CH<inf>3</inf>COO)<inf>2</inf>Zn•<inf>2</inf>H<inf>2</inf>O and diethanolamine ((HOCH<inf>2</inf>CH<inf>2</inf>)<inf>2</inf>NH, DEA) into absolute ethanol (C<inf>2</inf>H<inf>5</inf>OH) with concentration of 0.5 M. The seeding solution was dip-coated onto the cleaned glass substrates. The G/F co-doped ZnO nanorods were synthesized by hydrothermal process. The G/F co-doped ZnO nanorods were grown on seed layer with varied ultraviolet ozone treatment at 2, 4, 6, 8, 10, 12, 14, 16 and18 min. The influence of ultraviolet ozone treatment on physical, optical and morphological of G/F co-doped ZnO nanorods have been extensively scrutinized by X-ray diffraction (XRD) and optical spectroscopy, UV-Visible Spectrophotometer (UV-vis) and Field emission scanning electron microscope (FE-SEM). The effects of ultraviolet ozone treatment on different density of Ga/F co-doped ZnO nanorods were obtained as different ultraviolet ozone treatment were introduced.
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    Effect of annealing temperature on TiO2 structured films by the glancing angle deposition with incline spinning substrate on rotating holder method
    (2011-10-13)
    Mekla, Vatcharinkorn
    ;
    Pukird, Supakorn
    ;
    Porntheerapat, Supanit
    ;
    Nukeaw, Jiti
    This work reports the effects of annealing on the TiO<inf>2</inf> thin films prepared by the GLAD technique with incline spinning substrate on rotating holder (ISSRH) by using the electron beam evaporation. The prepared films were heated at 500 C , 600 C and 700 C for 2 hr in air. The microstructure of films was studied by UV- visible photometer, X-ray diffraction, XRD and field emission scanning electron microscope, FE-SEM. The results showed the sample films exhibited continuity distribution of the crystalline. The XRD peaks of anatase phase were increased slightly vary with annealing temperature. The porosity of films has been changed with increasing temperature. The film with annealing at 500 C showed the percentage of transferring range of 442-800 nm wavelengths and the maximum absorption of light at 418 nm wavelengths. The calculation evidenced the energy band gap of TiO<inf>2</inf> nanostructures was around 3.41 eV. © 2011 IEEE.
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    Effect of thickness on GLAD TiO2 thin films with incline spinning substrate on rotating holder (ISSRH) technique
    (2011-06-06)
    Mekla, Vatcharinkorn
    ;
    Pukird, Supakorn
    ;
    Porntheerapat, Supanit
    ;
    Nukeaw, Jiti
    The report presents the effects of the thickness on the TiO<inf>2</inf> thin films prepared by the GLAD technique with incline spinning substrate on rotating holder (ISSRH) by using the electron beam evaporation. The prepared films were heated at 500 °C for 2 hr in air. The microstructure of films was investigated by UV- visible photometer, X-ray diffraction, XRD and field emission scanning electron microscope, FE-SEM. The results showed the thickness of 10, 50, 100 and 300 nm films exhibited continuity distribution of the crystalline. The crystalline structure evidenced the dominant peak at the 300 nm thickness. GLAD TiO<inf>2</inf> films exhibited the columnar growth and porosity. The TiO<inf>2</inf> nanostructures showed rutile phase. © (2011) Trans Tech Publications.