• Login
    View Item 
    •   Oxy Scholar Home
    • Chemistry
    • Chemistry URC Student Scholarship
    • View Item
    •   Oxy Scholar Home
    • Chemistry
    • Chemistry URC Student Scholarship
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Macroscopic Materials Built from Ag Nanocrystals

    Thumbnail
    Author
    Johnson, Donald
    Issue
    urc_student; urc_student
    Date
    2005-01-01 0:00
    Metadata
    Show full item record
    URI
    https://scholar.oxy.edu/handle/20.500.12711/610
    Abstract
    Ag nanoparticles are faceted bits of silver metal with diameters on the nanometer length scale. As such, they are another set of building blocks, or ?artificial atoms,? that can be utilized by chemists to create new materials. In our laboratory, we have developed methods to form two materials from Ag nanocrystal precursors. The first material is a thin film, formed at the organic-aqueous liquid interface. Transmission Electron Microscopy (TEM) and Optical Spectroscopy have shown that the film is composed of individual Ag nanocrystals packed as multi-layers. An aqueous phase compound critical to film formation is mercaptoundecanoic acid (MUA), which produces a blue or silvery opalescent film at the organic-aqueous interface. Data and results are presented that explore how the film properties change with varying the identity of the aqueous phase ligand. The second material is created by the controlled evaporation of solvents associated with the film after displacement from the liquid-liquid interfacial region. Amber, micron-sized crystals can be formed by removing the film from the interface and depositing the film on a glass surface, like a Petri dish. We observe these crystals under an optical microscope, and preliminary results from Scanning Tunneling Microscopy (STM) will be presented. Our hypothesis is that these amber crystals are composed of individual Ag nanocrystals, self-assembled into the larger micron-sized structures during solvent evaporation. Our study in the near term is to determine a method for making these amber crystals in a controllable manner and learn about their structural properties.
    Collections
    • Chemistry URC Student Scholarship

    Browse

    All of Oxy ScholarCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsJournal TitleJournal IssueThis CollectionBy Issue DateAuthorsTitlesSubjectsJournal TitleJournal Issue

    My Account

    LoginRegister

    DSpace software copyright © 2002-2021  DuraSpace
    Contact Us | Send Feedback
    DSpace Express is a service operated by 
    Atmire NV