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- W3023357917 abstract "The behavior of a fluorophore near a gold nanoparticle is rationalized by a theoretical description of the parameters that modify the fluorescence emission: nanoparticle–fluorophore distance, fluorescence quantum yield (ϕ⁰), and fluorophore absorption and emission spectra, to find optimum conditions for designing fluorophore–nanoparticle probes. The theoretical maximum gain in brightness of the nanoparticle–fluorophore system with respect to the isolated molecule increases almost inversely proportional to ϕ⁰. The brightness enhancement in imaging experiments in vitro was assessed by using Au-SiO₂ core–shell nanoparticles deposited on glass. A ∼13-fold emission brightness enhancement for weakly fluorescent molecules was observed. A significant increase in fluorophore photostability, rendering longer imaging times, was obtained for fluorophores interacting with gold nanoparticles incorporated by endocytosis in cells. Our results illustrate a way to increase imaging times and to study molecules in the vicinity of a metallic nanoparticle after photobleaching of background fluorescence." @default.
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- W3023357917 date "2012-01-01" @default.
- W3023357917 modified "2023-09-26" @default.
- W3023357917 title "Detection of Low Quantum Yield Fluorophores and Improved Imaging Times Using Metallic Nanoparticles B" @default.
- W3023357917 hasPublicationYear "2012" @default.
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