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BY-NC-ND 3.0 license Open Access Published by De Gruyter Open Access June 8, 2016

Hybrid silica-gold core-shell nanoparticles for fluorescence enhancement

J. Grzelak , A. Krajewska , B. Krajnik , D. Jamiola , J. Choma , B. Jankiewicz , D. Piątkowski , P. Nyga and S. Mackowski
From the journal Nanospectroscopy

Abstract

We demonstrate that SiO2 nanoparticles coated with a gold island film (GIF) provide an efficient plasmonic platform for enhancing fluorescence intensity of chlorophyll-containing photosynthetic complexes. Fluorescence images obtained for single SiO2-Au coreshell nanoparticles mixed with photosynthetic complexes reveal very uniform emission patterns of a circular shape, similarly as observed for bare SiO2 nanoparticles. The fluorescence enhancement of chlorophyll emission for SiO2-Au nanostructures is up to four-fold compared to bare SiO2 nanoparticles and shortening of fluorescence decay indicates its plasmonic origin. For doublets or triplets of core-shell SiO2-Au nanoparticles, the intensity of emission is further increased as a result of hot-spot formation at the interfaces of such assemblies.

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Received: 2015-6-1
Accepted: 2016-4-5
Published Online: 2016-6-8

© 2016 J. Grzelak et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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