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Proceedings Paper

Hollow metal nanostructures for enhanced plasmonics (Conference Presentation)
Author(s): Aziz Genç; Javier Patarroyo; Jordi Sancho-Parramon; Martial Duchamp; Edgar Gonzalez; Neus G. Bastus; Lothar Houben; Rafal Dunin-Borkowski; Victor F. Puntes; Jordi Arbiol
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Paper Abstract

Complex metal nanoparticles offer a great playground for plasmonic nanoengineering, where it is possible to cover plasmon resonances from ultraviolet to near infrared by modifying the morphologies from solid nanocubes to nanoframes, multiwalled hollow nanoboxes or even nanotubes with hybrid (alternating solid and hollow) structures. We experimentally show that structural modifications, i.e. void size and final morphology, are the dominant determinants for the final plasmonic properties, while compositional variations allow us to get a fine tuning. EELS mappings of localized surface plasmon resonances (LSPRs) reveal an enhanced plasmon field inside the voids of hollow AuAg nanostructures along with a more homogeneous distributions of the plasmon fields around the nanostructures. With the present methodology and the appropriate samples we are able to compare the effects of hybridization at the nanoscale in hollow nanostructures. Boundary element method (BEM) simulations also reveal the effects of structural nanoengineering on plasmonic properties of hollow metal nanostructures. Possibility of tuning the LSPR properties of hollow metal nanostructures in a wide range of energy by modifying the void size/shell thickness is shown by BEM simulations, which reveals that void size is the dominant factor for tuning the LSPRs. As a proof of concept for enhanced plasmonic properties, we show effective label free sensing of bovine serum albumin (BSA) with some of our hollow nanostructures. In addition, the different plasmonic modes observed have also been studied and mapped in 3D.

Paper Details

Date Published: 27 April 2016
PDF: 1 pages
Proc. SPIE 9722, Colloidal Nanoparticles for Biomedical Applications XI, 972206 (27 April 2016); doi: 10.1117/12.2211598
Show Author Affiliations
Aziz Genç, Institut de Ciència de Materials de Barcelona (Spain)
Javier Patarroyo, Institut Català de Nanociència i Nanotecnologia (ICN2) (Spain)
Jordi Sancho-Parramon, Institut Ruder Boškovic (Croatia)
Martial Duchamp, Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Jülich GmbH (Germany)
Edgar Gonzalez, Instituto Geofísico, Pontificia Univ. Javeriana Bogotá (Colombia)
Neus G. Bastus, Institut Català de Nanociència i Nanotecnologia (ICN2) (Spain)
Lothar Houben, Forschungszentrum Jülich GmbH (Germany)
Rafal Dunin-Borkowski, Forschungszentrum Jülich GmbH (Germany)
Victor F. Puntes, Institut Català de Nanociència i Nanotecnologia (ICN2) (Spain)
ICREA (Spain)
Vall d’Hebron Institut de Recerca (Spain)
Jordi Arbiol, Institut de Ciència de Materials de Barcelona (Spain)
ICREA (Spain)

Published in SPIE Proceedings Vol. 9722:
Colloidal Nanoparticles for Biomedical Applications XI
Wolfgang J. Parak; Marek Osinski; Xing-Jie Liang, Editor(s)

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