Surface enhanced Raman spectroscopy of aromatic compounds on silver nanoclusters
| Autor: | Yafit Fleger, Michael Rosenbluh, David H. Dressler, Yitzhak Mastai |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
inorganic chemicals
Inorganic chemistry macromolecular substances Photochemistry Nanoclusters Condensed Matter::Materials Science chemistry.chemical_compound symbols.namesake Nuclear magnetic resonance X-ray photoelectron spectroscopy Monolayer Physics::Atomic and Molecular Clusters Materials Chemistry Molecule Spectroscopy Benzoic acid Chemical technology Nanostructured materials technology industry and agriculture Surfaces and Interfaces Surface-enhanced Raman spectroscopy Condensed Matter Physics Surfaces Coatings and Films chemistry Molecular vibration symbols Raman spectroscopy Raman scattering |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/j.susc.2009.01.020 |
| Popis: | Surface enhanced Raman spectroscopy (SERS) has been used to characterize multilayers of three different aromatic compounds in the proximity of silver nanoclusters. SERS of mercapto benzoic acid (MBA), which adsorbs onto the silver nanoclusters through the sulfur moiety, exhibits frequency shifts in comparison to the Raman spectrum of crystalline MBA. Conversely, benzoic acid and benzophenone that adsorb through the oxygen species lack these frequency shifts, and show only a typical SERS enhancement. We employed X-ray photoelectron spectroscopy (XPS), to probe the nature of the binding between the silver and the three different aromatic compounds. Thereafter, we assigned the major Raman peaks of all three molecules to specific molecular vibrations. Overall, this enables us to determine the origin of the observed shifts in the SERS spectrum of MBA and similar molecules. |
| Databáze: | OpenAIRE |
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