English  |  正體中文  |  简体中文  |  Items with full text/Total items : 75369/75369 (100%)
Visitors : 24772850      Online Users : 665
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/71372

    Title: 金屬氧化物奈米結構製備及其表面親疏水性質之研究
    Authors: 邱婕伶;Chiu,Chieh-Ling
    Contributors: 化學工程與材料工程學系
    Keywords: 奈米結構;金屬氧化物;親疏水性
    Date: 2016-08-26
    Issue Date: 2016-10-13 12:47:19 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 近年來,表面潤濕性的研究已經引起人們的關注,由於其廣泛的應用,如自潔,抗菌和抗霧等。因此了解和控制固體材料表面的潤濕性是非常重要的。雖然金屬氧化物材料表面的潤濕性目前已經被廣泛研究,然而,在不同實驗條件下所造成金屬氧化物表面擁有不同潤濕性之確切機制尚不明確。
    ;Recently, the research of surface wettability has attracted increasing interest due to its wide variety of applications, such as self-cleaning, antibacterial, and anti-fogging. Therefore, understanding and controlling the surface wettability of solid materials is absolutely essential. The surface wettability of metal oxide materials has been studied extensively. However, the exact mechanism of the wetting behaviors of metal oxide surfaces under different experimental conditions is not yet well defined.
    In this study, various metal oxide thin films and nanowires were fabricated by thermal oxidation of pure metal films. The evolutions of surface morphology, crystal structure, chemical composition, and surface wettability of metal oxide films after different experimental treatments have been investigated by SEM, TEM, ATR-FTIR, and water contact angle measurements. The obtained results showed that all the as-oxidized metal oxide thin films were hydrophilic in nature. However, their surface wettability would gradually transform from hydrophilic to hydrophobic with increasing the storage time under atmospheric ambient or vacuum environment at room temperature. The reversible switching of the surface wettability of metal oxide films can be accomplished by alternate annealing in oxygen ambient and storage in vacuum or in atmosphere.
    The surface wettability were also investigated in this study, and it was found that the silicon dioxide and gold films have the same wetting behaviors as those of metal oxides. The reversible wettability conversion is likely due to the surface state variety. The oxygen related defects and oxygen adatoms created by oxygen annealing make the surfaces have high surface free energy, in which results hydrophilic surfaces. However, these defects were not stable. When the storage time is long enough, the surface will return to its hydrophobic state.
    Appears in Collections:[化學工程與材料工程研究所] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明