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dc.contributor.author Chen, SY
dc.contributor.author Mock, JJ
dc.contributor.author Hill, RT
dc.contributor.author Chilkoti, A
dc.contributor.author Smith, DR
dc.contributor.author Lazarides, AA
dc.coverage.spatial United States
dc.date.accessioned 2011-06-21T17:27:02Z
dc.date.issued 2010-11-23
dc.identifier http://www.ncbi.nlm.nih.gov/pubmed/21038892
dc.identifier.citation ACS Nano, 2010, 4 (11), pp. 6535 - 6546
dc.identifier.uri http://hdl.handle.net/10161/4100
dc.description.abstract Surface plasmons supported by metal nanoparticles are perturbed by coupling to a surface that is polarizable. Coupling results in enhancement of near fields and may increase the scattering efficiency of radiative modes. In this study, we investigate the Rayleigh and Raman scattering properties of gold nanoparticles functionalized with cyanine deposited on silicon and quartz wafers and on gold thin films. Dark-field scattering images display red shifting of the gold nanoparticle plasmon resonance and doughnut-shaped scattering patterns when particles are deposited on silicon or on a gold film. The imaged radiation patterns and individual particle spectra reveal that the polarizable substrates control both the orientation and brightness of the radiative modes. Comparison with simulation indicates that, in a particle-surface system with a fixed junction width, plasmon band shifts are controlled quantitatively by the permittivity of the wafer or the film. Surface-enhanced resonance Raman scattering (SERRS) spectra and images are collected from cyanine on particles on gold films. SERRS images of the particles on gold films are doughnut-shaped as are their Rayleigh images, indicating that the SERRS is controlled by the polarization of plasmons in the antenna nanostructures. Near-field enhancement and radiative efficiency of the antenna are sufficient to enable Raman scattering cyanines to function as gap field probes. Through collective interpretation of individual particle Rayleigh spectra and spectral simulations, the geometric basis for small observed variations in the wavelength and intensity of plasmon resonant scattering from individual antenna on the three surfaces is explained.
dc.format.extent 6535 - 6546
dc.language eng
dc.language.iso en_US en_US
dc.relation.ispartof ACS Nano
dc.relation.isversionof 10.1021/nn101644s
dc.subject Carbocyanines
dc.subject Electric Impedance
dc.subject Gold
dc.subject Metal Nanoparticles
dc.subject Semiconductors
dc.subject Silicon
dc.subject Spectrum Analysis, Raman
dc.subject Surface Properties
dc.title Gold nanoparticles on polarizable surfaces as Raman scattering antennas.
dc.title.alternative en_US
dc.type Journal Article
dc.description.version Version of Record en_US
duke.date.pubdate 2010-11-0 en_US
duke.description.endpage 6546 en_US
duke.description.issue 11 en_US
duke.description.startpage 6535 en_US
duke.description.volume 4 en_US
dc.relation.journal Acs Nano en_US
pubs.author-url http://www.ncbi.nlm.nih.gov/pubmed/21038892
pubs.issue 11
pubs.organisational-group /Duke
pubs.organisational-group /Duke/Institutes and Provost's Academic Units
pubs.organisational-group /Duke/Institutes and Provost's Academic Units/Initiatives
pubs.organisational-group /Duke/Institutes and Provost's Academic Units/Initiatives/Energy Initiative
pubs.organisational-group /Duke/Pratt School of Engineering
pubs.organisational-group /Duke/Pratt School of Engineering/Biomedical Engineering
pubs.organisational-group /Duke/Pratt School of Engineering/Electrical and Computer Engineering
pubs.organisational-group /Duke/School of Medicine
pubs.organisational-group /Duke/School of Medicine/Institutes and Centers
pubs.organisational-group /Duke/School of Medicine/Institutes and Centers/Duke Cancer Institute
pubs.organisational-group /Duke/Trinity College of Arts & Sciences
pubs.organisational-group /Duke/Trinity College of Arts & Sciences/Chemistry
pubs.publication-status Published
pubs.volume 4
dc.identifier.eissn 1936-086X

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