• Login
    View Item 
    •   SMARTech Home
    • Georgia Tech Theses and Dissertations
    • Georgia Tech Theses and Dissertations
    • View Item
    •   SMARTech Home
    • Georgia Tech Theses and Dissertations
    • Georgia Tech Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Toward a quantitative understanding of the shape-controlled synthesis of colloidal noble-metal nanocrystals

    Thumbnail
    View/Open
    PENG-DISSERTATION-2015.pdf (6.614Mb)
    Date
    2015-10-29
    Author
    Peng, Hsin-Chieh
    Metadata
    Show full item record
    Abstract
    This dissertation is focused on the development of a quantitative analysis of the thermodynamic and kinetic factors responsible for the mechanisms and pathways during the nucleation and growth of noble-metal nanocrystals. With the chemisorption of Br− ions on Pd{100} facets as an example, I demonstrate the capability of quantitatively analyzing the coverage density of this capping agent using a combination of inductively coupled plasma mass spectrometry and X-ray photoelectron spectroscopy. I further apply the collision model that has long been established in surface science to seed-mediated growth of cubic seeds with or without chemisorbed Br− ions on their side facets in an effort to account for the deposition probability of atoms on the surface of a seed and thus its growth pattern in the presence or absence of surface capping. In a third project, with the polyol synthesis of Pd nanocrystals as an example, I demonstrate that the kinetic parameters, including rate constant and activation energy of a reaction can be derived from spectroscopic measurement and then used to calculate the initial reduction rate and further confirm that this parameter can be a quantitative knob for controlling the internal structure of a nanocrystal. Finally, the symmetry breaking phenomenon involved in the seed-mediated growth of Pd nanocrystals was investigated by quantitatively correlating the growth modes (symmetric vs. asymmetric) with the reaction kinetics simulated based on experimental parameters. The quantitative understanding achieved in this dissertation lays the foundation for the rational design and deterministic synthesis of nanocrystals with desired and controlled structures, shapes, and related properties.
    URI
    http://hdl.handle.net/1853/56186
    Collections
    • Georgia Tech Theses and Dissertations [23877]
    • School of Chemistry and Biochemistry Theses and Dissertations [1525]

    Browse

    All of SMARTechCommunities & CollectionsDatesAuthorsTitlesSubjectsTypesThis CollectionDatesAuthorsTitlesSubjectsTypes

    My SMARTech

    Login

    Statistics

    View Usage StatisticsView Google Analytics Statistics
    facebook instagram twitter youtube
    • My Account
    • Contact us
    • Directory
    • Campus Map
    • Support/Give
    • Library Accessibility
      • About SMARTech
      • SMARTech Terms of Use
    Georgia Tech Library266 4th Street NW, Atlanta, GA 30332
    404.894.4500
    • Emergency Information
    • Legal and Privacy Information
    • Human Trafficking Notice
    • Accessibility
    • Accountability
    • Accreditation
    • Employment
    © 2020 Georgia Institute of Technology