Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

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Title: Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers
Authors: Damm, Signe
Fedele, Stefano
Murphy, Antony
Barry, James N.
Dowling, Denis P.
Rice, James H.
et al.
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Date: May-2015
Abstract: Here we demonstrate that quasi self-standing Au nanorod arrays prepared with plasma polymerisation deposited SiO2 dielectric spacers support surface enhanced fluorescence (SEF) while maintaining high signal reproducibility. We show that it is possible to find a balance between enhanced radiative and non-radiative decay rates at which the fluorescent intensity is maximized. The SEF signal optimised with a 30 nm spacer layer thickness, showed a 3.5-fold enhancement with a signal variance of <15% thereby keeping the integrity of the nanorod array. We also demonstrate the decreased importance of obtaining resonance conditions when LSPR is positioned within the spectral region of Au interband transitions. Procedures for further increasing the SEF enhancement factor are also discussed.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: AIP Publishing
Copyright (published version): 2015 AIP Publishing LLC
Keywords: Gold;Nanorods;Fluorescence;Fluorescence spectra;Nanostructures
DOI: 10.1063/1.4919968
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection
Physics Research Collection

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