Journal ArticleDOI
Vibrational properties of ultrathin PTCDA films on Ag(110)
Frank Stefan Tautz,S. Sloboshanin,Juergen A. Schaefer,Reinhard Scholz,V. Shklover,Moritz Sokolowski,Eberhard Umbach +6 more
Reads0
Chats0
TLDR
In this article, a 3,4,9,10-perylene-tetracarboxylic acid-dianhydride (PTCDA) films on the Ag(110) surface by high-resolution electron energy loss (HREEL) and Fourier transform infrared (FTIR) spectroscopy were investigated.Abstract:
We have investigated 3,4,9,10-perylene-tetracarboxylic acid-dianhydride (PTCDA) films on the Ag(110) surface by High-resolution electron energy loss (HREEL) and Fourier transform infrared (FTIR) spectroscopy. X-ray photoemission spectroscopy, low-energy electron diffraction (LEED), and quadrupole mass spectroscopy were used to control thickness, composition, and order of the vacuum-sublimated PTCDA films. Taking advantage of the high surface sensitivity of HREELS, it is possible to clearly distinguish molecules in direct binding contact to the surface from those being in a PTCDA environment, because the spectra show differential peak shifts of the vibrational lines for the former molecules. To aid the interpretation of the spectra, discrete Fourier transform calculations of the vibrational frequencies of the free molecule were carried out. The results are in good agreement with the experimental values for the molecules in the multilayer and allow the identification of most of the experimental modes, if experimental information from off-specular HREELS measurements is taken into account. By the comparison of the calculated frequency spectrum with FTIR data it is possible to extract the effects of the intermolecular interaction on the vibrational spectra.read more
Citations
More filters
Journal ArticleDOI
Complex organic molecules at metal surfaces: bonding, organisation and chirality
S.M. Barlow,Rasmita Raval +1 more
TL;DR: In this article, the authors present a review of the available literature for complex carboxylic acids, amino acids, anhydrides and ring systems, all deposited under controlled conditions onto defined metal surfaces.
Journal ArticleDOI
Structure and bonding of large aromatic molecules on noble metal surfaces: The example of PTCDA
TL;DR: In this paper, the model molecule 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) and the noble metal surfaces of Cu, Ag, and Au were studied.
Journal ArticleDOI
Electronic spectroscopy in He droplets
TL;DR: In this article, a review of recent experiments on the electronic spectroscopy of atoms, clusters, and organic molecules embedded in helium nanodroplets is reviewed, including the appearance of side bands in the spectra due to the excitation of helium collective vibrations.
Journal ArticleDOI
Electronic and vibrational spectroscopies applied to organic/inorganic interfaces.
Journal ArticleDOI
Optical differential reflectance spectroscopy of ultrathin epitaxial organic films
Roman Forker,Torsten Fritz +1 more
TL;DR: This Perspective will give an overview on optical reflectance spectroscopy of highly ordered organic thin films in the thickness range from submonolayers to several monolayers, as a tool to study the absorption behavior of such films and emphasize the relations between the physical layer structure and the resulting optical properties.