Dresden 2009 – wissenschaftliches Programm
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SYSO: Symposium Self-organizing Surfaces and Interfaces
SYSO 3: Self-Organizing Surfaces and Interfaces - Posters
SYSO 3.20: Poster
Mittwoch, 25. März 2009, 17:30–19:30, P3
Molecular arrangement of self-assembled Metal-Phthalocyanine on GaAs(001) — •L. Riele1, R. Passmann1,2, V. Rackwitz1, T. Bruhn1,2, B.-O. Fimland3, M. Kneissl1, N. Esser1,2, and P. Vogt1 — 1TU Berlin, Institut für Festkörperphysik, Hardenbergstr.36, 10623 Berlin, Germany — 2ISAS Berlin, Albert-Einstein-Str.9, 12489 Berlin, Germany — 3NUST, NO-7491 Trondheim, Norway
Phthalocyanines have proved to be important materials for sensing applications such as chemical sensors. Therefore it is the major interest to profoundly understand the structural and electronical properties of such organic/inorganic hybrid systems.
Here we report on non-planar lead phthalocyanine (PbPc) deposited on the three main GaAs(001) reconstructions, i.e. c(4x4), (2x4) and (4x2). The samples were prepared under UHV conditions and investigated in terms of their interfacial atomic optical and chemical structure.
Our previous results showed an anisotropic molecular arrangement within 20nm thick PbPc films depending on the initial GaAs(001) substrate surface reconstruction. By using scanning tunneling microscopy (STM) the initial deposition steps and molecular arrangement are here investigated on self-assembled submonolayer coverages of PbPc on GaAs(001). These results help to elucidate how the arrangement of the adsorbed PbPc molecules within the first monolayer is influenced by the atomic configuration of the GaAs substrate.