Differences in single and aggregated nanoparticle plasmon spectroscopy. Issue 5 (17th December 2014)

• Record Type: Journal Article
• Authors: Singh, Pushkar; Deckert-Gaudig, Tanja; Schneidewind, Henrik; Kirsch, Konstantin; van Schrojenstein Lantman, Evelien M.; Weckhuysen, Bert M.; Deckert, Volker
• Is Part Of: Physical chemistry chemical physics. Volume 17:Issue 5(2015)
• Page Start: 2991
• Page End: 2995
• Publication Date: 2014-12-17
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c4cp04850d
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A comparison of SERS and TERS experiments reveals that in TERS the number of molecules investigated is so low that averaging effects are concealed. 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.