Electron Energy Loss Spectroscopy Investigation into Symmetry in Gold Trimer and Tetramer Plasmonic Nanoparticle Structures
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Authors
Barrow, Steven
Rossouw, David
Funston, Alison M
Botton, Gianluigi A
Mulvaney, Paul
Publication Date
2016-08-02Journal Title
ACS Nano
ISSN
1936-0851
Publisher
American Chemical Society
Volume
10
Pages
8552-8563
Language
English
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Barrow, S., Collins, S., Rossouw, D., Funston, A. M., Botton, G. A., Midgley, P., & Mulvaney, P. (2016). Electron Energy Loss Spectroscopy Investigation into Symmetry in Gold Trimer and Tetramer Plasmonic Nanoparticle Structures. ACS Nano, 10 8552-8563. https://doi.org/10.1021/acsnano.6b03796
Abstract
We present a combined scanning transmission electron microscopy−electron energy loss spectroscopy (STEM−EELS) investigation into the mode symmetries of plasmonic nanoparticle trimer and tetramer structures. We obtain nanometer-resolved energy loss spectra for both trimer and tetramer structures and compare these to boundary element method simulations. We show that EELS, in conjunction with eigenmode simulations, offers a complete characterization of the individual superstructures, and we trace the evolution of both optically dark and bright modes and identify multipolar mode contributions. We then apply this technique to tetramer structures that exhibit an expanded range of mode symmetries for two-dimensional and three-dimensional selfassembled geometries. These findings provide a comprehensive experimental account of the available photonic states in self-assembled nanoparticle clusters.
Keywords
STEM−EELS, surface plasmon, nanoparticle assemblies, non-negative matrix factorization, electron energy loss spectroscopy
Sponsorship
University of Melbourne (MATS Scholarship), Ernst and Grace Matthaei (Research Scholarship), Gates Cambridge (Scholarship), Royal Society (Newton International Fellowship scheme), European Research Council under the European Union’s Seventh Framework Program (Grant IDs: FP7/2007-2013)/ERC Grant Agreement No. 291522-3DIMAGE, Integrated Infrastructure Initiative (Reference No. 312483-ESTEEM2), Australian Research Council (ARC) (Grant IDs: LF 100100117, FT110100545, DP120101573), Natural Sciences and Engineering Research Council (NSERC), Canada (Discovery grant)
Funder references
European Research Council (291522)
EC FP7 CP WITH CSA (312483)
Identifiers
External DOI: https://doi.org/10.1021/acsnano.6b03796
This record's URL: https://www.repository.cam.ac.uk/handle/1810/260393
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