Morphology control and characteristics of ZnO/ZnS nanorod arrays synthesised by microwave-assisted heating

Ming Kwen Tsai, Wei Huang, Sheng Yao Hu, Jyh Wei Lee, Yueh Chien Lee, Min-Hung Lee, Ji Lin Shen

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The morphology control investigations on ZnO/ZnS core/shell nanorod fabricated by microwave-assisted in-situ surface sulphidation of ZnO nanorod arrays is presented. First, the ZnO nanorod arrays are grown on ZnO/Si substrate by microwave heating of a mixed zinc nitrate hexahydrate and hexamethylenetetramine precursors in deionised water. Then, the grown ZnO nanorod arrays on ZnO/Si substrate are immersed in thioacetamide (TAA) aqueous solution to undergo sulphidation process to form ZnS shell on ZnO core. The morphological, structural, and optical characteristics of the as-prepared ZnO nanorods and ZnO/ZnS core/shell nanorods are investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL) measurements, respectively. The SEM images and XRD patterns show that the ZnS shell becomes thicker due to more and more ZnS nanoparticles formed with increasing the concentration of TAA solution. The PL spectra demonstrate that the thicker ZnS shell results in more oxygen vacancies occupied by S atom, and would decrease the intensity ratio of the deep-level emission to the ultra-violet emission for the ZnO/ZnS core/shell nanorods synthesised with the higher concentration of TAA solution.

    Original languageEnglish
    Pages (from-to)192-195
    Number of pages4
    JournalMicro and Nano Letters
    Volume11
    Issue number4
    DOIs
    Publication statusPublished - 2016 Apr 1

    Fingerprint

    Nanorods
    nanorods
    Microwaves
    Heating
    microwaves
    heating
    Thioacetamide
    Photoluminescence
    Methenamine
    hexamethylenetetramine
    photoluminescence
    X ray diffraction
    Scanning electron microscopy
    scanning electron microscopy
    Microwave heating
    Deionized water
    ultraviolet emission
    Substrates
    Oxygen vacancies
    Diffraction patterns

    ASJC Scopus subject areas

    • Bioengineering
    • Biomedical Engineering
    • Materials Science(all)
    • Condensed Matter Physics

    Cite this

    Morphology control and characteristics of ZnO/ZnS nanorod arrays synthesised by microwave-assisted heating. / Tsai, Ming Kwen; Huang, Wei; Hu, Sheng Yao; Lee, Jyh Wei; Lee, Yueh Chien; Lee, Min-Hung; Shen, Ji Lin.

    In: Micro and Nano Letters, Vol. 11, No. 4, 01.04.2016, p. 192-195.

    Research output: Contribution to journalArticle

    Tsai, Ming Kwen ; Huang, Wei ; Hu, Sheng Yao ; Lee, Jyh Wei ; Lee, Yueh Chien ; Lee, Min-Hung ; Shen, Ji Lin. / Morphology control and characteristics of ZnO/ZnS nanorod arrays synthesised by microwave-assisted heating. In: Micro and Nano Letters. 2016 ; Vol. 11, No. 4. pp. 192-195.
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    abstract = "The morphology control investigations on ZnO/ZnS core/shell nanorod fabricated by microwave-assisted in-situ surface sulphidation of ZnO nanorod arrays is presented. First, the ZnO nanorod arrays are grown on ZnO/Si substrate by microwave heating of a mixed zinc nitrate hexahydrate and hexamethylenetetramine precursors in deionised water. Then, the grown ZnO nanorod arrays on ZnO/Si substrate are immersed in thioacetamide (TAA) aqueous solution to undergo sulphidation process to form ZnS shell on ZnO core. The morphological, structural, and optical characteristics of the as-prepared ZnO nanorods and ZnO/ZnS core/shell nanorods are investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL) measurements, respectively. The SEM images and XRD patterns show that the ZnS shell becomes thicker due to more and more ZnS nanoparticles formed with increasing the concentration of TAA solution. The PL spectra demonstrate that the thicker ZnS shell results in more oxygen vacancies occupied by S atom, and would decrease the intensity ratio of the deep-level emission to the ultra-violet emission for the ZnO/ZnS core/shell nanorods synthesised with the higher concentration of TAA solution.",
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