Blue-Shifted Narrow Localized Surface Plasmon Resonance from Dipole Coupling in Gold Nanoparticle Random Arrays

    Authors

    J. A. Jenkins; Y. D. Zhou; S. Thota; X. D. Tian; X. W. Zhao; S. L. Zau;J. Zhao

    Comments

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    Abbreviated Journal Title

    J. Phys. Chem. C

    Keywords

    SELF-ASSEMBLED MONOLAYER; ENHANCED RAMAN-SPECTROSCOPY; ELECTRON-BEAM; LITHOGRAPHY; SINGLE SILVER NANOCUBES; NANOSPHERE LITHOGRAPHY; WAVE-GUIDE; SENSING CAPABILITIES; COLLOID MONOLAYERS; ULTRATHIN FILMS; SOLAR-CELLS; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary

    Abstract

    In this work, we develop a simple method to produce highly uniform localized surface plasmon resonance (LSPR) substrates based on self-assembly of colloidal gold nanoparticles onto pretreated glass substrates. The LSPR wavelength of the gold nanoparticle arrays is blue-shifted from that of the gold nanoparticles in solution and the single gold nanoparticles on glass substrate. The LSPR width is narrower than that of the single gold nanoparticles. The blue-shifted LSPR is due to the long-range dipole coupling in the gold nanoparticle random arrays indicated from simulations using the T-matrix method. In addition to the popularly used LSPR wavelength dependence on the dielectric environment, we have found that the LSPR width of the gold nanoparticle random arrays is also sensitive to the change in the dielectric environment. The LSPR substrates are reproducible, uniform, and robust with potential applications in LSPR sensing and imaging.

    Journal Title

    Journal of Physical Chemistry C

    Volume

    118

    Issue/Number

    45

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    26276

    Last Page

    26283

    WOS Identifier

    WOS:000344978000050

    ISSN

    1932-7447

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