Nanorattles with tailored electric field enhancement
Schnepf MJ, Mayer M, Kuttner C, Tebbe M, Wolf D, Dulle M, Altantzis T, Formanek P, Foerster S, Bals S, Koenig TAF, Fery A (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 9
Pages Range: 9376-9385
Journal Issue: 27
DOI: 10.1039/c7nr02952g
Abstract
Nanorattles are metallic core-shell particles with core and shell separated by a dielectric spacer. These nanorattles have been identified as a promising class of nanoparticles, due to their extraordinary high electric-field enhancement inside the cavity. Limiting factors are reproducibility and loss of axial symmetry owing to the movable metal core; movement of the core results in fluctuation of the nanocavity dimensions and commensurate variations in enhancement factor. We present a novel synthetic approach for the robust fixation of the central gold rod within a well-defined box, which results in an axisymmetric nanorattle. We determine the structure of the resulting axisymmetric nanorattles by advanced transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS). Optical absorption and scattering cross-sections obtained from UV-vis-NIR spectroscopy quantitatively agree with finite-difference time-domain (FDTD) simulations based on the structural model derived from SAXS. The predictions of high and homogenous field enhancement are evidenced by scanning TEM electron energy loss spectroscopy (STEM-EELS) measurement on single-particle level. Thus, comprehensive understanding of structural and optical properties is achieved for this class of nanoparticles, paving the way for photonic applications where a defined and robust unit cell is crucial.
Involved external institutions
Universität Bayreuth
Germany (DE)
University of Antwerp / Universiteit Antwerpen
Belgium (BE)
Leibniz-Institut für Polymerforschung Dresden e. V.
Germany (DE)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Germany (DE)
University of Antwerp / Universiteit Antwerpen
Belgium (BE)
Leibniz-Institut für Polymerforschung Dresden e. V.
Germany (DE)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
How to cite
APA:
Schnepf, M.J., Mayer, M., Kuttner, C., Tebbe, M., Wolf, D., Dulle, M.,... Fery, A. (2017). Nanorattles with tailored electric field enhancement. Nanoscale, 9(27), 9376-9385. https://doi.org/10.1039/c7nr02952g
MLA:
Schnepf, Max J., et al. "Nanorattles with tailored electric field enhancement." Nanoscale 9.27 (2017): 9376-9385.
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