title: Differences in single and aggregated nanoparticle plasmon spectroscopy.
abstract: Vibrational spectroscopy usually provides structural information averaged over many molecules. We report a larger peak position variation and reproducibly smaller FWHM of TERS spectra compared to SERS spectra indicating that the number of molecules excited in a TERS experiment is extremely low. Thus, orientational averaging effects are suppressed and micro ensembles are investigated. This is shown for a thiophenol molecule adsorbed on Au nanoplates and nanoparticles.
authors.affiliation: Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745 Jena, Germany.
authors.forename: Pushkar
authors.initials: P
authors.lastname: Singh
authors.forename: Tanja
authors.initials: T
authors.lastname: Deckert-Gaudig
authors.forename: Henrik
authors.initials: H
authors.lastname: Schneidewind
authors.forename: Konstantin
authors.initials: K
authors.lastname: Kirsch
authors.forename: Evelien M
authors.initials: EM
authors.lastname: van Schrojenstein Lantman
authors.forename: Bert M
authors.initials: BM
authors.lastname: Weckhuysen
authors.forename: Volker
authors.initials: V
authors.lastname: Deckert