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Lordan, Frances
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Lordan, Frances
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Lordan, Frances
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Now showing 1 - 6 of 6
- PublicationSurface enhanced resonance Raman and luminescence on plasmon active nanostructured cavities(American Institute of Physics, 2010-10-11)
; ; ; ; Presented here are studies of the impact of excitation angle on surface enhanced Raman and luminescence spectroscopy of dye immobilized on a plasmon active nanocavity array support. Results show that both Raman and luminescence intensities depend on the angle of incidence consistent with the presence of cavity supported plasmon modes. Dependence of scattering or emission intensity with excitation angle occurs over the window of observation.303Scopus© Citations 29 - PublicationSite selective surface enhanced Raman on nanostructured cavities(American Institute of Physics, 2011-07-18)
; ; ; ; Presented here are angle dependence studies on the surface enhanced Raman (SER) signal obtained from dye placed on plasmon active nanocavity arrays. A comparative study was carried out between two modified array supports. One array had dye placed only on the interior walls of the cavities in the array. The other array had dye placed only on its top flat surface. Results show that Raman intensities as a function of angle depend on the location of the dye on the array; this was interpreted to arise from the presence of different plasmon polariton modes in these sites.344Scopus© Citations 30 - PublicationEffect of cavity architecture on the surface enhanced emission from site selective nanostructured cavity arrays(ACS Publications, 2012-03)
; ; ; ; Presented here are studies of the impact of incident angle on surface-enhanced emission from a dye that is located site selectively on a plasmon-active nanocavity array support. Studies were performed for a surface-active luminescent dye selectively assembled on the top surface or on the walls of the voids of nanocavity array substrates. Results show that emission intensities depend on where the dye is located with respect to the void or surface of the nanocavity array and on the dimensions of the cavity. This was interpreted to arise from the presence of void-localized plasmons and surface-localized and -delocalized plasmon modes.428Scopus© Citations 32 - PublicationThe Effect of Ag Nanoparticles on Surface-Enhanced Luminescence from Au Nanovoid Arrays(Springer, 2013-12)
; ; ; ; ; ; Studies comparing the effect of adding two different nanoparticle compositions on the plasmonic properties of Au nanovoid arrays were undertaken. Surface-enhanced resonance luminescence and surface-enhanced resonance Raman studies comparing dispersed Ag nanoparticles and Ag nanoparticle aggregates on gold nanovoid arrays were undertaken. These studies showed that using Ag nanoparticle aggregates increased both luminescence and Raman efficiency relative to when dispersed nanoparticles were used; in addition, these studies also showed that adding dispersed Ag nanoparticles supported a more reproducible enhancement in luminescence and Raman across the substrate compared to using Ag nanoparticle aggregates. Finite element analysis simulations indicated that surface plasmon polariton distribution in the sample was affected by the presence of the Ag nanoparticles on the Au nanovoid array.363Scopus© Citations 24 - PublicationApplication of AAO matrix in aligned gold nanorod array substrates for surface-Enhanced fluorescence and Raman scatteringIn this paper, we probed surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF) from probe molecule Rhodamine 6G (R6G) on self-standing Au nanorod array substrates made using a combination of anodization and potentiostatic electrodeposition. The initial substrates were embedded within a porous alumina template (AAO). By controlling the thickness of the AAO matrix, SEF and SERS were observed exhibiting an inverse relationship. SERS and SEF showed a non-linear response to the removal of AAO matrix due to an inhomogeneous plasmon activity across the nanorod which was supported by FDTD calculations. We showed that by optimizing the level of AAO thickness, we could obtain either maximized SERS, SEF or simultaneously observe both SERS and SEF together.
482Scopus© Citations 28 - PublicationTemperature dependence of a1 and b2 type modes in the surface enhanced Raman from 4-Aminobenzenethiol(Elsevier, 2013-01-29)
; ; ; ; ; ; ; We study here the effect of temperature upon the continuum emission and Stokes Raman peak ratios from a monolayer of 4-Aminobenzenethiol molecules prepared on a plamon active nanocavity array from an active spherical cap architecture nanomaterial substrate. Our results show that there is partial recover of SERS spectral profile following heating. Our results show that chemical enhanced b2-type modes are affected differently relative to electromagnetic enhanced a1-type modes and to the continuum emission background.385Scopus© Citations 8