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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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