Differences in single and aggregated nanoparticle plasmon spectroscopy
Literature Information
Pushkar Singh, Tanja Deckert-Gaudig, Henrik Schneidewind, Konstantin Kirsch, Evelien M. van Schrojenstein Lantman, Bert M. Weckhuysen
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.
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