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dc.contributor.authorMoretti, Manola
dc.contributor.authorDas, Gobind
dc.contributor.authorTorre, Bruno
dc.contributor.authorAllione, Marco
dc.contributor.authorDi Fabrizio, Enzo M.
dc.date.accessioned2015-08-12T09:31:25Z
dc.date.available2015-08-12T09:31:25Z
dc.date.issued2015-05-23
dc.identifier.citationMoretti, M., Das, G., Torre, B., Allione, M., & Di Fabrizio, E. (2016). Tip Enhanced Raman Spectroscopy of Rhodamine 6G on nanostructured gold substrate. Optics and Lasers in Engineering, 76, 52–56. doi:10.1016/j.optlaseng.2015.04.018
dc.identifier.issn01438166
dc.identifier.doi10.1016/j.optlaseng.2015.04.018
dc.identifier.urihttp://hdl.handle.net/10754/566181
dc.description.abstractA new concept based setup for Tip Enhanced Raman Scattering measurement assisted by gold nanostructure is presented, that can provide a platform for gap-mode enhancement of the signal at the single molecule level conjugated with controlled spatial localization of the molecule under investigation and a method to determine the diffraction limit properties of the tip. In essence, this effect is obtained illuminating a gold coated AFM tip which is raster scanned over a nanostructured gold substrate, after chemisorption of a Raman active molecule. We expect that the near-field Raman enhancement would be given by the gap-mode effect of the two facing nano-features. Thanks to the nanostructured substrate, we verify that the resolution of the Raman mapping signal is well below the diffraction limit given by the combination of the optics geometry and the laser wavelength. We show that the gap-mode TERS can generate an estimated field- enhancement (g) of ~20 in localized areas of the sample and we demonstrate the ability to spatially define the molecule position (by Raman mapping) at the tens of nanometers scale. © 2015 Elsevier Ltd.
dc.publisherElsevier BV
dc.subjectField enhancement
dc.subjectGap-mode TERS
dc.subjectNanostructure
dc.subjectRaman spectroscopy
dc.subjectRhodamine 6G
dc.titleTip Enhanced Raman Spectroscopy of Rhodamine 6G on nanostructured gold substrate
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalOptics and Lasers in Engineering
kaust.personMoretti, Manola
kaust.personDas, Gobind
kaust.personTorre, Bruno
kaust.personAllione, Marco
kaust.personDi Fabrizio, Enzo M.
dc.date.published-online2015-05-23
dc.date.published-print2016-01


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