English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/101661
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Plasmonics and single-molecule detection in evaporated silver-island films

AuthorsRodríguez-Oliveros, Rogelio; Albella, Pablo ; Sánchez-Gil, José A. ; Aroca, Ricardo F.
Near field
Surface-enhanced Raman scattering
Issue Date2012
CitationAnnalen der Physik 524(11): 697-704 (2012)
AbstractThe plasmonic origin of surface-enhanced Raman scattering (SERS) leads to the concept of hotspots and plasmon coupling that can be realized in the interstitial regions, or on specially engineered, silver and gold nanostructures. It is also possible to achieve spatial locations of high local field or hotspots on silver-island films (SIF) allowing single-molecule detection (SMD). When a single monomolecular layer coating the SIFs contains dye molecules dispersed in it, single-molecule impurities, (with an average of one hundred dye molecules in 1 µm2, which is the field of view of the micro-Raman system), SMD is observed as a rare statistical event. Here, the SMD results for silver-island films are presented, with the same nominal mass thickness, but differing in the localized surface plasmon resonance that is a function of the temperature of substrate during deposition. A blue-shifted plasmon can be seen as a decrease in plasmon coupling for deposition at higher temperature. A simple two-particle model for localized plasmon resonance coupling calculations, including the shape and substrate effects seems to explain the trend of observations.
Identifiersdoi: 10.1002/andp.201200149
issn: 0003-3804
e-issn: 1521-3889
Appears in Collections:(CFMAC-IEM) Artículos
(CFM) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.