Metal Enhanced Fluorescence Solution-based Sensing Platform 2: Fluorescent Core-Shell Ag@SiO2 Nanoballs |
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| Authors: | Kadir Aslan Meng Wu Joseph R. Lakowicz Chris D. Geddes |
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| Affiliation: | (1) Institute of Fluorescence, Laboratory for Advanced Medical Plasmonics, Medical Biotechnology Center, University of Maryland Biotechnology Institute, 725 W. Lombard St., Baltimore, MD 21201, USA;(2) Center for Fluorescence Spectroscopy, University of Maryland School of Medicine, 725 W. Lombard St., Baltimore, MD 21021, USA |
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| Abstract: | ![]()
In this Rapid Communication, we present the development of monodisperse core-shell (silver core-silica shell) nanoparticles with various shell thicknesses featuring a fluorophore, subsequently named Metal-Enhanced Fluorescence (MEF) nanoballs. MEF nanoballs consist of a ≈130 nm silver nanoparticle core, a silica shell with up to 35 nm thickness and fluorophores doped within the silica shell. Fluorescent nanobubbles where the silver core is removed by chemical etching are used as control samples to show the benefits of using silver nanoparticles, i.e, Metal-Enhanced Fluorescence. Finally, we demonstrate the broad potential biological applications of MEF nanoballs by employing near-infra red emitting probes (Rhodamine 800) within the silica shell, for potential applications in cellular imaging and solution-based sensing. Kadir Aslan, Meng Wu, Contributed equally |
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| Keywords: | Metal-enhanced fluorescence Radiative decay engineering Plasmon enhanced luminescence Plasmon enhanced fluorescence Surface enhanced fluorescence Fluorescence Plasmon Plasmonics Nanoparticles Silver nanoparticles Silver colloids Solution sensing platform |
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