Percolation in nanoporous gold and the principle of universality for two-dimensional to hyperdimensional networks

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dc.contributor.author Smith, GB
dc.contributor.author Maaroof, AI
dc.contributor.author Cortie, MB
dc.date.accessioned 2010-05-28T09:42:51Z
dc.date.issued 2008-10-22
dc.identifier.citation Physical Review B - Condensed Matter and Materials Physics, 2008, 78 (16)
dc.identifier.issn 1098-0121
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/8386
dc.description.abstract Percolation in nanoporous gold can be achieved with as little as 8% by volume of gold. Samples of nanoporous gold of various morphologies are analyzed with a combination of electrical and optical data. Growing thin films and complex multiply connected three-dimensional networks both display nonuniversal character. Growing films have two-dimensional morphology but a three-dimensional percolation threshold and nonuniversal critical coefficients, yet similar silver films percolate as expected with universal coefficients. Growing gold however regresses to two-dimensional resistive behavior between 65% to 100% gold, and this regime lies along a single power-law curve shared by the hyperdimensional networks of gold, suggesting underlying symmetry governed by diffusion-limited aggregation. Models of data imply either hyperdimensionality or major internal property changes as density shifts. The distinctive flat spectral signature found near the percolation threshold is common to all highly porous samples and is explained quantitatively in terms of effective plasmonic response. Parameters from fits of effective medium models to optical and resistivity data are in close agreement, especially at the highest porosities. They imply an effective dimension which increases continuously as porosity grows via the increased branching needed for structural integrity. © 2008 The American Physical Society.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1103/PhysRevB.78.165418
dc.title Percolation in nanoporous gold and the principle of universality for two-dimensional to hyperdimensional networks
dc.type Journal Article
dc.description.version Published
dc.parent Physical Review B - Condensed Matter and Materials Physics
dc.journal.volume 16
dc.journal.volume 78
dc.journal.number 16 en_US
dc.publocation College Pk en_US
dc.identifier.startpage 1 en_US
dc.identifier.endpage 1 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0204 Condensed Matter Physics
dc.personcode 730312
dc.personcode 020302
dc.personcode 010727
dc.percentage 100 en_US
dc.classification.name Condensed Matter Physics en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity ISI:000260574500107 en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Materials and Technology for Energy Efficiency
utslib.copyright.status Open Access
utslib.copyright.date 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history School of Physics and Advanced Materials (ID: 343)
utslib.collection.history School of Physics and Advanced Materials (ID: 343)
utslib.collection.history General (ID: 2)


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