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 re...

Full description

Saved in:

Bibliographic Details
Published in:	Applied physics. A, Materials science & processing Vol. 111; no. 3; pp. 711 - 717
Main Authors:	Magoulakis, Evaggelos, Kostopoulou, Athanasia, Arvanitakis, Georgios N., Kanaras, Antonios G., Andriotis, Antonis N., Lappas, Alexandros, Loukakos, Panagiotis A.
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Springer-Verlag 01-06-2013 Springer
Subjects:	Characterization and Evaluation of Materials Condensed Matter Physics Cross-disciplinary physics: materials science; rheology Dynamics Electron transport Exact sciences and technology Gold Machines Manufacturing Materials science Mathematical models Nanoscale materials and structures: fabrication and characterization Nanostructure Nanotechnology Nanowires Networks Optical and Electronic Materials Physics Physics and Astronomy Porous materials; granular materials Processes Quantum wires Rapid Communication Specific materials Surfaces and Interfaces Thin Films Three dimensional Probe Beam Plasmon Resonance Peak Electron Occupation Electronic Heat Capacity Ultrafast Dynamic Gold Porous materials Nanostructures Time resolved spectra Phenomenological model Relaxation Transition elements Dissipation Rate equation Electron mobility Nanowires Porosity Optical spectrum Ultrafast process
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	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.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0947-8396 1432-0630
DOI:	10.1007/s00339-013-7647-x