Integrated Imaging Facility

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  • Author(s):
    Trevor B. Demille, Robert A. Hughes, Nathaniel Dominique, Jacob E. Olson, Sergei Rouvimov, Jon P. Camden, Svetlana Neretina
    Abstract:

    A method for the nanofabrication of periodic arrays of gold nanostars yielding a unique morphology of relevance to SERS applications. With arms radiating from a central core, gold nanostars represent a unique and fascinating class of nanomaterials from which extraordinary plasmonic properties are derived. Despite their relevance to sensing applications, methods for fabricating homogeneous populations of nanostars on large-area planar surfaces in truly periodic arrays is lacking. Herein, the f…

    Date Published:
    2020-07
    Record Visibility:
    Public
  • Author(s):
    Robert Hughes, Sergei Rouvimov, Robert Neal, Trevor B. Demille, Svetlana Neretina
    Abstract:

    The seed-mediated growth of noble metal nanostructures with planar geometries requires the use of seeds lined with parallel stacking faults so as to provide a break in symmetry in an otherwise isotropic metal. Although such seeds are now routinely synthesized using colloidal pathways, equivalent pathways have not yet been reported for the fabrication of substrate-based seeds with the same internal defect structures. The challenge is not merely to form seeds with planar defects but to do so in…

    Date Published:
    2019-07
    Record Visibility:
    Public
  • Author(s):
    Svetlana Neretina, Arin S. Preston, Robert A. Hughes, Trevor B. Demille
    Abstract:

    Galvanic replacement reactions are widely used in the synthesis of bimetallic nanoshells. Essential to these syntheses is the design of template materials with electrochemical potentials that are low enough to facilitate the replacement of a wide variety of metals. While Cu is an attractive template from this standpoint, it has only rarely been used due to its propensity for oxidation and the associated difficulties in achieving chemically stable colloids. Here, a synthetic scheme is demonstr…

    Date Published:
    2018
    Record Visibility:
    Public