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Author: search.filters.author.Chongsri, KrisanaSubject: search.filters.subject.Nanostructure

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    Investigation on influence of seeding layer on morphological properties of ZnO-based nanostructure prepared by hydrothermal process
    (2018-01-01)
    Chongsri, Krisana
    ;
    Boonyarattanakalin, Kanokthip
    ;
    Pecharapa, Wisanu
    In this present work, bare ZnO low-dimensional structures were synthesized by hydrothermal process with crystal growth assistance using seed layers. Different seeding layer species including ZnO and Ga-doped ZnO films prepared by sol-gel dip coating were introduced onto the substrate before the hydrothermal growth of ZnO-based nanostructures. Zn(NO<inf>3</inf>)<inf>2</inf> and GaN<inf>3</inf>O<inf>9</inf> were utilized as Zn and Ga source during hydrothermal process. The influence of seeding layer types on morphological and shapes of the hydrothermally grown nanostructures have been extensively scrutinized by Field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) and optical spectroscopy. It was revealed that different morphologies and exceptional shapes in form of nanorods of ZnO-based nanostructures were obtained as different seeding layers were introduced. More detailed studies for clarification of seed layer effect on the growth of ZnO-based nanostructures are mentioned and discussed.
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    Hydrothermal synthesis and characterization of ZnO:F nanorod structure
    (2016-01-01)
    Sinornate, Wuttichai
    ;
    Chongsri, Krisana
    ;
    Pecharapa, Wisanu
    F-doped ZnO nanorod structures were synthesized via hydrothermal process with variation of doping content starting from zinc nitrate solution and zinc oxide thin film used as seeding layer. The zinc oxide seeding film was fabricated by spin coating on glass substrate using zinc acetate precursor and annealed at 500 °C for 2 h. Relevant properties of ZnO:F nanorod structures were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and UV-VIS spectrophotometer. Corresponding results indicated that ZnO:F nanorod array, grown in (002) plane, has the characteristics of good crystallinity. In addition, this study showed that ZnO:F nanorod with exceptional structure can be obtained by hydrothermal process, operated at proper treatment time, temperature and F-doping content.