Tip Enhanced Raman Spectroscopy of Rhodamine 6G on nanostructured gold substrate

Handle URI:
http://hdl.handle.net/10754/566181
Title:
Tip Enhanced Raman Spectroscopy of Rhodamine 6G on nanostructured gold substrate
Authors:
Moretti, Manola; Das, Gobind ( 0000-0003-0942-681X ) ; Torre, Bruno; Allione, Marco ( 0000-0003-0757-9791 ) ; Di Fabrizio, Enzo M. ( 0000-0001-5886-4678 )
Abstract:
A 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.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier BV
Journal:
Optics and Lasers in Engineering
Issue Date:
May-2015
DOI:
10.1016/j.optlaseng.2015.04.018
Type:
Article
ISSN:
01438166
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMoretti, Manolaen
dc.contributor.authorDas, Gobinden
dc.contributor.authorTorre, Brunoen
dc.contributor.authorAllione, Marcoen
dc.contributor.authorDi Fabrizio, Enzo M.en
dc.date.accessioned2015-08-12T09:31:25Zen
dc.date.available2015-08-12T09:31:25Zen
dc.date.issued2015-05en
dc.identifier.issn01438166en
dc.identifier.doi10.1016/j.optlaseng.2015.04.018en
dc.identifier.urihttp://hdl.handle.net/10754/566181en
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.en
dc.publisherElsevier BVen
dc.subjectField enhancementen
dc.subjectGap-mode TERSen
dc.subjectNanostructureen
dc.subjectRaman spectroscopyen
dc.subjectRhodamine 6Gen
dc.titleTip Enhanced Raman Spectroscopy of Rhodamine 6G on nanostructured gold substrateen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalOptics and Lasers in Engineeringen
kaust.authorMoretti, Manolaen
kaust.authorDas, Gobinden
kaust.authorTorre, Brunoen
kaust.authorAllione, Marcoen
kaust.authorDi Fabrizio, Enzo M.en
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