UMD Theses and Dissertations

Permanent URI for this collectionhttp://hdl.handle.net/1903/3

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a given thesis/dissertation in DRUM.

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Author: search.filters.author.YOUNG, SHENG-YUSubject: search.filters.subject.growth mechanism

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    DLC Thin Film Assisted ZnO Nanowires Growth
    (2008-08-12) YOUNG, SHENG-YU; Salamanca-Riba, Lourdes; Material Science and Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    In this study, we successfully fabricated dense, uniform, vertically aligned ZnO NWs on top of DLC films. The NWs' length, diameter and separation distance were controllable by fine tuning the growth parameters and changing the DLC film deposition temperature. HRTEM examination confirms the NWs were single crystalline with c-axis preferred orientation (lattice parameter c = 0.519 nm). From our experiment results, a ZnO polycrystalline layer forms first and then ZnO NWs grow on top of it. The NW has two sections. The bottom section has wider diameter of 100nm ~ 1 , and the upper thinner section were about 20 ~ 80 nm and it extends for in length. EDS maps by SEM and TEM showed the elemental concentration of the Zn, O and C in NWs. From all the investigations, we established a model of growth mechanism for ZnO NWs growth on DLC film.