English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/177351
Share/Impact:
Statistics
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
Exportar a otros formatos:
Title

Theory of SERS enhancement: general discussion

AuthorsGraham, Duncan; Goodacre, Roy; Arnolds, Heike; Masson, Jean-Francois; Schatz, George; Baumberg, Jeremy J.; Kim, Dong-Ho; Aizpurua, Javier ; Lum, William; Silvestri, Alessandro; Nijs, Bart de; Xu, Yikai; Di Martino, Giuliana; Natan, Michael; Schlücker, Sebastian; Wuytens, Pieter; Bruzas, Ian; Kuttner, Christian; Hardy, Mike; Chikkaraddy, Rohit; Martín Sabanés, Natalia; Delfino, Ines; Dawson, Paul; Gawinkowski, Sylwester; Bontempi, Nicolò; Mahajan, Sumeet; Reich, Stephanie; Hourahine, Ben; Bell, Steven; Krolikowska, Agata; Porter, Marc; Keeler, Alex; Kamp, Marlous; Fountain, Augustus; Fasolato, Claudia; Giorgis, Fabrizio; Otero, Juan C.; Matricardi, Cristiano; Van Duyne, Richard; Lombardi, John; Deckert, Volker; Velleman, Leonora
Issue Date2017
PublisherRoyal Society of Chemistry (UK)
CitationFaraday Discussions 205: 173-211 (2017)
AbstractRohit Chikkaraddy opened the discussion of the Introductory Lecture: Regarding quantifying the chemical enhancement, you showed a systematic change in the SERS enhancement for halide substituted molecules due to charge transfer from the metal. Is the extra enhancement due to an inherent increase in the Raman cross-section of the molecule? How do you go about referencing, as the charge transfer changes the vibrational frequency? Richard Van Duyne answered: The extra enhancement is not due to an increase in the Raman cross section, as that is ratioed out in the calculation of the enhancement factor. The charge transfer (CT) process does not transfer a complete electron, it is a fractional degree of CT. Thus the change in vibrational frequency is small. DFT calculations that provide eigenvectors allow one to reference the vibrational modes of the free molecule with those of the adsorbed molecule. Sylwester Gawinkowski asked: You have shown that the enhancement factor curve is redshifted relative to the plasmon resonance band and has a maximum at about 800 nm. This means that the SERS signal should be strongest for excitations in the near infrared spectral region. Why do most SERS reports, particularly related to single molecule SERS, have the excitation in the green or red spectral range and not in the near infrared?
DescriptionThe first page of this article is displayed as the abstract.
Publisher version (URL)https://doi.org/10.1039/C7FD90095C
URIhttp://hdl.handle.net/10261/177351
Identifiersdoi: 10.1039/C7FD90095C
issn: 1359-6640
e-issn: 1364-5498
Appears in Collections:(CFM) Artículos
Files in This Item:
File Description SizeFormat 
SERSDiscussionPost.pdf239,07 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


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