AuAl<inf>2</inf> and PtAl<inf>2</inf> as potential plasmonic materials

Keast, VJ; Zwan, B; Supansomboon, S; Cortie, MB; Persson, POA

AuAl<inf>2</inf> and PtAl<inf>2</inf> as potential plasmonic materials

Keast, VJ Zwan, B Supansomboon, S Cortie, MB

Persson, POA

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Publication Type:: Journal Article
Citation:: Journal of Alloys and Compounds, 2013, 577 pp. 581 - 586
Issue Date:: 2013-01-01

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Field	Value	Language
dc.contributor.author	Keast, VJ	en_US
dc.contributor.author	Zwan, B	en_US
dc.contributor.author	Supansomboon, S	en_US
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.contributor.author	Persson, POA	en_US
dc.date.issued	2013-01-01	en_US
dc.identifier.citation	Journal of Alloys and Compounds, 2013, 577 pp. 581 - 586	en_US
dc.identifier.issn	0925-8388	en_US
dc.identifier.uri	http://hdl.handle.net/10453/27237
dc.description.abstract	The dielectric functions of PtAl2, AuAl2 and hypothetical intermediate alloys of the two in the form of Aux- Pt1-xAl 2 were calculated from first principles using density functional theory (DFT) and the random phase approximation (RPA). From these, the reflectivity, electron energy-loss spectra (EELS) and small sphere extinction spectra are predicted. The experimental reflectivity and EELS were measured for PtAl2 and showed good agreement with the theoretical spectra. The yellow color of PtAl2 is associated with a bulk plasmon at 3 eV. We predict that the optical properties of hypothetical intermediate alloys would show a smooth evolution with composition. The details of this change can be understood by examination of the underlying density of states (DOS). The predicted small sphere extinction spectra and quality factors show a strong surface plasmon resonance for these materials, with PtAl2 having the optimum performance. The results indicate that these materials are good candidates for applications in plasmonics. © 2013 Elsevier B.V. All rights reserved.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP120102545
dc.relation.ispartof	Journal of Alloys and Compounds	en_US
dc.relation.isbasedon	10.1016/j.jallcom.2013.06.161	en_US
dc.subject.classification	Materials	en_US
dc.title	AuAl<inf>2</inf> and PtAl<inf>2</inf> as potential plasmonic materials	en_US
dc.type	Journal Article
utslib.citation.volume	577	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	0914 Resources Engineering and Extractive Metallurgy	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	577	en_US

Abstract:

The dielectric functions of PtAl2, AuAl2 and hypothetical intermediate alloys of the two in the form of Aux- Pt1-xAl 2 were calculated from first principles using density functional theory (DFT) and the random phase approximation (RPA). From these, the reflectivity, electron energy-loss spectra (EELS) and small sphere extinction spectra are predicted. The experimental reflectivity and EELS were measured for PtAl2 and showed good agreement with the theoretical spectra. The yellow color of PtAl2 is associated with a bulk plasmon at 3 eV. We predict that the optical properties of hypothetical intermediate alloys would show a smooth evolution with composition. The details of this change can be understood by examination of the underlying density of states (DOS). The predicted small sphere extinction spectra and quality factors show a strong surface plasmon resonance for these materials, with PtAl2 having the optimum performance. The results indicate that these materials are good candidates for applications in plasmonics. © 2013 Elsevier B.V. All rights reserved.

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http://hdl.handle.net/10453/27237