• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Preparation of Electro- and Magneto-Active Hybrid Nanocomposite Materials

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_etd_11431_sip1_m.pdf
    Size:
    9.885Mb
    Format:
    PDF
    Download
    Author
    Kim, Bo Yun
    Issue Date
    2011
    Advisor
    Pyun, Jeffrey
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    This dissertation describes the preparation and characterization of magneto and electro-active hybrid nanocomposite materials. In this research, two hybrid nanocomposite materials, gold-cobalt oxide nanowires and ferrocene functional polymer brushes on electrode surface, were investigated. Polymerizations of magnetic colloidal monomers to form electro-active nanowires and ferrocene functional monomers on electrode to form electro-active polymer brushes were demonstrated. The central focus of this research is utilizing colloidal polymerization and surface-initiated polymerization to prepare electro-active hybrid nanocomposite materials for potential applications in energy storage and conversion.Colloidal polymerization has been developed as a novel synthetic methodology to prepare 1-D mesostructures via dipolar assembly and chemical reaction. This method was exploited to synthesize multicomponent 1-D nanowires by using polymer-coated ferromagnetic gold-cobalt core-shell nanoparticles as colloidal monomers. Prepared semiconductor cobalt oxide nanowires with gold inclusions exhibited enhanced optical and electrochemical properties compared to cobalt oxide nanowires. This research provided a platform in fabricating a wide range multicomponent semiconductor nanowires as new nanostructured electrodes for potential applications in energy storage and conversion. Further, self-assembled gold-cobalt core-shell nanoparticles were utilized to align novel gold nanoparticles on a substrate. This facile and template free approach enabled the linear and ring assembly of noble gold metal on a substrate.Indium tin oxide (ITO) thin films are key components as transparent electrodes in a number of optoelectronic devices. The modification of ITO surfaces with polymers via electropolymerization has been widely investigated to improve surface compatibility and charge injection from the interface. However, there remain challenges to prepare polymers possessing, well-defined interfacial chemistry, molecular weight, composition, and functionality. This dissertation provides a modular synthetic methodology to prepare ferrocene functional polymer brushes on ITO via surface-initiated atom transfer radical polymerization (SI-ATRP). This work provided a simple model study to enable direct electrochemical and topographic characterization of well-defined polymer brushes on ITO with controlled molar mass and composition. These ITO grafted polymer brushes are also a novel model system for optoelectronic materials, where the effect of chain alignment and morphology can be correlated with electrical and electrochemical properties.
    Type
    Electronic Dissertation
    text
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Chemistry
    Degree Grantor
    University of Arizona
    Collections
    Dissertations

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.