Nanograin VO2 in the metal phase: A plasmonic system with falling dc resistivity as temperature rises

DSpace/Manakin Repository

Search OPUS

Advanced Search


My Account

Show simple item record Gentle, A Maaroof, AI Smith, GB 2009-12-21T02:33:06Z 2007-01-17
dc.identifier.citation Nanotechnology, 2007, 18 (2)
dc.identifier.issn 0957-4484
dc.identifier.other C1 en_US
dc.description.abstract Thin films of vanadium dioxide with grain sizes smaller than 60nm have a metallic phase with excellent plasmonic response, but their dc resistivity falls as temperature rises to values well above the metal-insulator transition. At the transition optical switching is complete, but the switch in dc resistance is incomplete. In the metallic phase, nanograin and large grain samples have similar values of both plasma frequency and relaxation rate. However, plasmonic response in nanograins is stronger due to the absence of a low energy interband transition found in large grain films. Conductivity rises with thermal activation energy of 108meV, which is well below that in the semiconductor phase. Possible mechanisms for 'non-metal-like' dc behaviour in this plasmonic system are briefly discussed. They include fluctuations, which are coherent in nanograins but incoherent for larger grains. Nanoscale systems seem preferable for optical switching applications and large grain structures for dc switching work. © IOP Publishing Ltd.
dc.language eng
dc.relation.hasversion Accepted manuscript version
dc.relation.isbasedon 10.1088/0957-4484/18/2/025202
dc.title Nanograin VO2 in the metal phase: A plasmonic system with falling dc resistivity as temperature rises
dc.type Journal Article
dc.description.version Published
dc.parent Nanotechnology
dc.journal.volume 2
dc.journal.volume 18
dc.journal.number 2 en_US
dc.publocation Bristol, UK en_US
dc.identifier.startpage 025202 en_US
dc.identifier.endpage 025209 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0904 Chemical Engineering
dc.personcode 730312
dc.personcode 000307
dc.personcode 010727
dc.percentage 100 en_US Chemical Engineering en_US
dc.classification.type FOR-08 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 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history General (ID: 2)
utslib.collection.history School of Physics and Advanced Materials (ID: 343)

Files in this item

This item appears in the following Collection(s)

Show simple item record