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Volume 191, 2016
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Synthesis of Janus plasmonic–magnetic, star–sphere nanoparticles, and their application in SERS detection

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Abstract

Multicomponent nanoparticles are of particular interest due to a unique combination of properties at the nanoscale, which make them suitable for a wide variety of applications. Among them, Janus nanoparticles, presenting two distinct surface regions, can lead to specific interactions with interfaces, biomolecules, membranes etc. We report the synthesis of Janus nanoparticles comprising iron oxide nanospheres and gold nanostars, through two consecutive seed-mediated-growth steps. Electron tomography combining HAADF-STEM and EDX mapping has been performed to evaluate the spatial distribution of the two components of the nanoparticle, showing their clear separation in a Janus morphology. Additionally, SERS measurements assisted by magnetic separation were carried out to assess the application of combined plasmonic and magnetic properties for sensing.

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Article information


Submitted
06 Feb 2016
Accepted
02 Mar 2016
First published
02 Mar 2016

This article is Open Access

Faraday Discuss., 2016,191, 47-59
Article type
Paper

Synthesis of Janus plasmonic–magnetic, star–sphere nanoparticles, and their application in SERS detection

J. Reguera, D. Jiménez de Aberasturi, N. Winckelmans, J. Langer, S. Bals and L. M. Liz-Marzán, Faraday Discuss., 2016, 191, 47
DOI: 10.1039/C6FD00012F

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