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Lecture Audrius Alkauskas


25 November 2005 FWN-Building 5113.0201, Nijenborgh 4, 9747 AG, Groningen
Speaker:Dr. Audrius Alkauskas
Affiliation:Institute of Physics, University of Basel
Title:Site-specific adsorption and energy level alignment of organic molecules on noble metal surfaces
Date:Fri Nov 25, 2005
Location:FWN-Building 5113.0201
Host:Audrius Pugzlys
Telephone:+31 50 363 4922


We discuss two important aspects of the interaction of large organic molecules with noble metal surfaces: site specific adsorption and alignment of molecular levels with respect to the Fermi level of the underlying metallic substrate. In the first part of the talk, density functional theory (DFT) calculations of adsorption of a representative organic molecule, naphthalene-tetracarboxylic-dianhydride (NTCDA), on the Ag(110) surface are presented. The site-specificity of the adsorption process is rationalized in terms of charge transfer between the sub-systems and the resulting local electrostatic attraction. In the second part, ultraviolet photo-emission spectroscopy (UPS) measurements for copper-octaethylporphyrin (CuOEP) on different metal surfaces are presented and critically analyzed. The dipole formed at the metal-organic interface is discussed and different contributions to it are evaluated.
Last modified:22 October 2012 2.30 p.m.