Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 51: Metal Substrates: Adsorption of Organic/Bio Molecules III
O 51.7: Vortrag
Mittwoch, 27. Februar 2008, 16:45–17:00, MA 041
Scanning Tunneling Microscopy Study of Iron(II) Phthalocyanine Growth on Metal and Insulating Surfaces — •Alessandro Scarfato1,2, Shih-Hsin Chang1, Germar Hoffmann1, and Roland Wiesendanger1 — 1Institute of Applied Physics and Microstructure Research Center Hamburg, University of Hamburg, Jungiusstrasse 11, D-20355, Hamburg, Germany — 2Dipartimento di Fisica “E. R. Caianiello”, Università degli Studi di Salerno e CNR-INFM Laboratorio Regionale SUPERMAT, via Salvador Allende, I-84081 Baronissi (SA), Italy
The growth behavior of iron(II) phthalocyanine (FePc) molecules on Cu(111) and on NaCl/Cu(111) surfaces up to a coverage ∼ 1.5 ML has been studied by a variable-temperature scanning tunneling microscope. Molecules have been deposited at room temperature to allow for surface diffusion. At low coverage (∼ 0.5 ML) no tendency of self assembling was observed, while at high coverages (> 1 ML) the second layer molecules self-organize to form long-range domains in the alpha phase. In order to tune molecule-substrate interaction insulating NaCl layers are introduced. Adsorption of FePc molecules on NaCl shows site specificity, i.e. the Fe atom adsorbs on top of a Cl− anion. We will discuss our results on the growth morphology in terms of molecule-molecule and molecule-substrate interactions in comparison with previous findings for FePc on Au(111).