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Issue 38, 2019
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SERS and plasmonic heating efficiency from anisotropic core/satellite superstructures

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Abstract

The optical properties of nanoparticle assemblies can be tailored via hybridization of plasmon modes. Isotropic core/satellite superstructures made of spherical nanoparticles are known to exhibit coupled modes with a strongly scattering (radiative) character, and provide hot spots yielding high activity in surface-enhanced Raman scattering (SERS). However, to complement this functionality with plasmonic heating, additional absorbing (non-radiative) modes are required. We introduce herein anisotropic superstructures formed by decorating a central nanorod with spherical satellite nanoparticles, which feature two coupled modes that allow application for both SERS and heating. On the basis of diffuse reflectance spectroscopy, small-angle X-ray scattering (SAXS), and electromagnetic simulations, the origin of the coupled modes is disclosed and thus serves as a basis toward alternative designs of functional superstructures. This work represents a proof-of-principle for the combination of high SERS efficiency with efficient plasmonic heating by near-infrared irradiation.

Graphical abstract: SERS and plasmonic heating efficiency from anisotropic core/satellite superstructures

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Publication details

The article was received on 18 Jul 2019, accepted on 11 Sep 2019 and first published on 18 Sep 2019


Article type: Paper
DOI: 10.1039/C9NR06102A
Nanoscale, 2019,11, 17655-17663
  • Open access: Creative Commons BY-NC license
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    SERS and plasmonic heating efficiency from anisotropic core/satellite superstructures

    C. Kuttner, R. P. M. Höller, M. Quintanilla, M. J. Schnepf, M. Dulle, A. Fery and L. M. Liz-Marzán, Nanoscale, 2019, 11, 17655
    DOI: 10.1039/C9NR06102A

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