|
Authors
|
Kuttner, C. ; Holler, R.P.M. ; Quintanilla, M. ; Schnepf, M. J. ; Dulle, M. ; Fery, A. ; Liz-Marzan, L. M.
|
|
Title
|
SERS and plasmonic heating efficiency from anisotropic core/satellite superstructures
|
|
Date
|
23.10.2019
|
|
Number
|
57247
|
|
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.
|
|
Publisher
|
Nanoscale
|
|
Wikidata
|
|
|
Citation
|
Nanoscale 11 (2019) 17655-17663
|
|
DOI
|
https://doi.org/10.1039/C9NR06102A
|
|
Tags
|
|
