Dresden 2011 – scientific programme
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DS: Fachverband Dünne Schichten
DS 63: Organic Thin Films II
DS 63.4: Talk
Friday, March 18, 2011, 12:45–13:00, GER 38
Locally Resolved Core-hole Screening, Molecular Orientation, and Morphology in Thin Films of Diindenoperylene Deposited on Au(111) Single Crystals — •Maria Benedetta Casu1, Britt-Elfriede Schuster1, Indro Biswas1, Christoph Raisch1, Helder Marchetto2, Thomas Schmidt2, and Thomas Chssé1 — 1IPTC, University of Tübingen, Tübingen, Germany — 2Fritz-Haber-Institut, Berlin, Germany
By using a combination of microscopic imaging and diffraction techniques with structural and chemical sensitivity, we studied the growth of diindenoperylene (DIP) on Au(111) single crystals. Growth and structure of DIP films of different thickness were monitored in situ including real time PEEM and LEEM performed at the beamline UE49-PGM-b-SMART at BESSY. A layer-by-layer mechanism characterizes the initial growth followed by island nucleation, i.e., the growth follows the Stranki-Krastanov mode. Highly resolved spectromicroscopy reveals that electronic structure, core-hole screening, and molecular orientation depend on the local morphology of thin films. These phenomena, like different screening of the core hole, or different FWHM of the XPS lines, have been previously shown comparing different samples consisting of monolayers and multilayers. In our work we show their occurrence comparing islands versus monolayers in the same film.