|
Title
|
|
|
|
Nanoscale mapping of plasmon and exciton in ZnO tetrapods coupled with Au nanoparticles
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Metallic nanoparticles can be used to enhance optical absorption or emission in semiconductors, thanks to a strong interaction of collective excitations of free charges (plasmons) with electromagnetic fields. Herein we present direct imaging at the nanoscale of plasmon-exciton coupling in Au/ZnO nanostructures by combining scanning transmission electron energy loss and cathodoluminescence spectroscopy and mapping. The Au nanoparticles (~30 nm in diameter) are grown in-situ on ZnO nanotetrapods by means of a photochemical process without the need of binding agents or capping molecules, resulting in clean interfaces. Interestingly, the Au plasmon resonance is localized at the Au/vacuum interface, rather than presenting an isotropic distribution around the nanoparticle. On the contrary, a localization of the ZnO signal has been observed inside the Au nanoparticle, as also confirmed by numerical simulations. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Scientific reports. - London, 2011, currens
| |
|
Publication
|
|
|
|
London
:
Nature Publishing Group
,
2016
| |
|
ISSN
|
|
|
|
2045-2322
| |
|
DOI
|
|
|
|
10.1038/SREP19168
| |
|
Volume/pages
|
|
|
|
6
(2016)
, 8 p.
| |
|
Article Reference
|
|
|
|
19168
| |
|
ISI
|
|
|
|
000368111900001
| |
|
Pubmed ID
|
|
|
|
26754789
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|