Launching low-energy surface plasmons in purple gold (AuAl2)

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dc.contributor.authorSamaimongkol, Panuponen
dc.contributor.authorRobinson, Hans D.en
dc.contributor.departmentPhysicsen
dc.date.accessioned2019-06-06T14:42:01Zen
dc.date.available2019-06-06T14:42:01Zen
dc.date.issued2019-03-01en
dc.date.updated2019-06-06T14:26:52Zen
dc.description.abstractWe confirm that the unusual purple color of the intermetallic compound AuAl 2 is of a plasmonic origin by launching surface plasmons (SPs) in thin AuAl 2 films. We measure the SP dispersion relation and also use the films to measure the index of refraction of sucrose solutions using standard SP resonance sensing. We find that the SP energy in planar AuAl 2 is approximately 2.1 eV, about 0.4 eV lower than in gold, and the material is highly resistant to oxidation. This is close to what is expected from previously reported measurements of the dielectric function of AuAl 2 . On this basis, we predict that AuAl 2 nanoparticles will a have very strong, spectrally nearly uniform light absorbance about an order of magnitude greater than standard carbon black. Such particles may therefore find applications as obscurants or as an alternative to more complex light-absorbing gold structures in areas such as photothermal therapy or solar steam generation, or in plasmonic catalysis.en
dc.description.versionPublished versionen
dc.format.extentPages 27-33en
dc.format.extent7 page(s)en
dc.identifier.doihttps://doi.org/10.1007/s13404-018-0250-3en
dc.identifier.eissn2190-7579en
dc.identifier.issn0017-1557en
dc.identifier.issue1en
dc.identifier.orcidRobinson, Hans [0000-0003-3928-105X]en
dc.identifier.urihttp://hdl.handle.net/10919/89891en
dc.identifier.volume52en
dc.languageEnglishen
dc.publisherSpringeren
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000458762300004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectScience & Technologyen
dc.subjectPhysical Sciencesen
dc.subjectTechnologyen
dc.subjectChemistry, Inorganic & Nuclearen
dc.subjectChemistry, Physicalen
dc.subjectMaterials Science, Multidisciplinaryen
dc.subjectChemistryen
dc.subjectMaterials Scienceen
dc.subjectPurple golden
dc.subjectSurface plasmonsen
dc.subjectThin filmsen
dc.subjectNanoparticlesen
dc.subjectLight absorberen
dc.subjectELECTRONIC-STRUCTUREen
dc.subjectADHESION LAYERen
dc.subjectTRANSFORMATIONSen
dc.subjectABSORPTIONen
dc.subjectPTAL2en
dc.subjectPhysical Chemistryen
dc.titleLaunching low-energy surface plasmons in purple gold (AuAl2)en
dc.title.serialGold Bulletinen
dc.typeArticle - Refereeden
dc.type.otherArticleen
dc.type.otherJournalen
dcterms.dateAccepted2018-11-10en
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/Physicsen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen

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