| Issue |
Eur. Phys. J. Appl. Phys.
Volume 54, Number 3, June 2011
Focus on Recent advances in (S)TEM and related spectroscopies: a tribute to C. Colliex
|
|
|---|---|---|
| Article Number | 33512 | |
| Number of page(s) | 9 | |
| DOI | https://doi.org/10.1051/epjap/2011100443 | |
| Published online | 14 June 2011 | |
https://doi.org/10.1051/epjap/2011100443
Spatially resolved measurements of plasmonic eigenstates in complex-shaped, asymmetric nanoparticles: gold nanostars
1
Laboratoire de Physique des Solides, Bâtiment 510, CNRS/UMR 8502, Univ Paris Sud 11, 91405 Orsay, France
2
Departamento de Química Física, and Unidad Asociada CSIC-Universidade de Vigo, 36310 Vigo, Spain
3
Instituto de Optica, CSIC, Serrano 121, 28006 Madrid, Spain
Received:
2
November
2010
Revised:
28
February
2011
Accepted:
17
March
2011
Published online:
13
June
2011
We report on spatially resolved electron energy-loss spectroscopy studies of optical modes in individual star-shaped gold nanoparticles. We studied different morphologies, ranging from a spheroid to well-developed nanostars. For each shape, essentially two groups of modes are appearing: the first one is localized around the core of the nanostars and has an energy slightly less than the quasi-static dipolar mode of a gold sphere (about 2.2 eV); in the second group, the modes are localized at the end of the nanostar tips, with varying energies depending on the geometry of each tip and with energy down to 1.2 eV. The localization of the tip modes is interpreted with the help of boundary element methods simulations.
© EDP Sciences, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.