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Porosity-moderated ultrafast electron transport in Au nanowire networks

Porosity-moderated ultrafast electron transport in Au nanowire networks
Porosity-moderated ultrafast electron transport in Au nanowire networks
We demonstrate for first time the ultrafast properties of a newly formed porous Au nanostructure. The properties
of the porous nanostructure are compared with those of a solid gold film using time-resolved optical spectroscopy.
The experiments suggest that under the same excitation conditions the relaxation dynamics are slower in the former.
Our observations are evaluated by simulations based on a phenomenological rate equation model. The impeded dynamics
has been attributed to the porous nature of the structure in the networks, which results in reduced efficiency during
the dissipation of the laser-deposited energy. Importantly,the porosity of the complex three-dimensional nanostructure
is introduced as a geometrical control parameter of its ultrafast electron transport.
0947-8396
711-717
Magoulakis, Evaggelos
7a94984d-82c4-487a-a070-097fe732970f
Kostopoulou, Athanasia
c11bf962-efe9-45cf-955c-8b21d1d8d547
Arvanitakis, G.N.
50f5790b-8047-4968-8abc-76bec1c1a027
Andriotis, Antonis
ed3a30b0-d98d-415e-a082-6f0d43a8e703
Lappas, Alexandros
3e727545-5524-4bb7-a240-1c1aef2ce62d
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Loukakos, Panagiotis
9c77f344-2da3-4adb-9b73-cb8bac9a1f3c
Magoulakis, Evaggelos
7a94984d-82c4-487a-a070-097fe732970f
Kostopoulou, Athanasia
c11bf962-efe9-45cf-955c-8b21d1d8d547
Arvanitakis, G.N.
50f5790b-8047-4968-8abc-76bec1c1a027
Andriotis, Antonis
ed3a30b0-d98d-415e-a082-6f0d43a8e703
Lappas, Alexandros
3e727545-5524-4bb7-a240-1c1aef2ce62d
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Loukakos, Panagiotis
9c77f344-2da3-4adb-9b73-cb8bac9a1f3c

Magoulakis, Evaggelos, Kostopoulou, Athanasia, Arvanitakis, G.N., Andriotis, Antonis, Lappas, Alexandros, Kanaras, Antonios G. and Loukakos, Panagiotis (2013) Porosity-moderated ultrafast electron transport in Au nanowire networks. Applied Physics A: Materials Science & Processing, 111 (3), 711-717. (doi:10.1007/s00339-013-7647-x).

Record type: Article

Abstract

We demonstrate for first time the ultrafast properties of a newly formed porous Au nanostructure. The properties
of the porous nanostructure are compared with those of a solid gold film using time-resolved optical spectroscopy.
The experiments suggest that under the same excitation conditions the relaxation dynamics are slower in the former.
Our observations are evaluated by simulations based on a phenomenological rate equation model. The impeded dynamics
has been attributed to the porous nature of the structure in the networks, which results in reduced efficiency during
the dissipation of the laser-deposited energy. Importantly,the porosity of the complex three-dimensional nanostructure
is introduced as a geometrical control parameter of its ultrafast electron transport.

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Published date: June 2013
Organisations: Quantum, Light & Matter Group

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Local EPrints ID: 358651
URI: https://eprints.soton.ac.uk/id/eprint/358651
ISSN: 0947-8396
PURE UUID: afd928ac-4353-4fad-ba0c-61e9bc725bc9
ORCID for Antonios G. Kanaras: ORCID iD orcid.org/0000-0002-9847-6706

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Date deposited: 10 Oct 2013 16:26
Last modified: 07 Aug 2019 00:39

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Contributors

Author: Evaggelos Magoulakis
Author: Athanasia Kostopoulou
Author: G.N. Arvanitakis
Author: Antonis Andriotis
Author: Alexandros Lappas
Author: Panagiotis Loukakos

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