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O: Oberflächenphysik

O 36: Postersitzung (Elektronische Struktur, Grenzfl
äche fest-flüssig, Halbleiteroberfl
ächen und -grenzfl
ächen, Nanostrukturen, Oberfl
ächenreaktionen, Teilchen und Cluster, Struktur und Dynamik reiner Oberfl
ächen)

O 36.17: Poster

Montag, 7. März 2005, 15:00–18:00, Poster TU F

In-situ Investigation of Adsorption of Functionalized Base-free Porphyrins at the Solid-liquid Interface using STM technique — •Maxim Smetanin¹, Zakariyya Ishtaiwi², Heinrich Lang², and Michael Hietschold¹ — ¹Chemnitz University of Technology, Institute of Physics, Solid Surfaces Analysis Group, D-09107 Chemnitz, Germany — ²Chemnitz University of Technology, Institute of Chemistry, Inorganic Chemistry, D-09111 Chemnitz, Germany

Molecular assemblies on surfaces are one of the key technologies for nanoscale electronic devices. Formation and characterization of ordered adlayers of porphyrin at surfaces is of great importance from the fundamental and technological point of view, since these molecules are closely related to the fields of molecular biology, photosynthesis, electrocatalysis and molecular devices. In this work, we present the adsorption studies of functionalized base-free porphyrins at the solid-liquid interface using Scanning Tunneling Microscopy (STM). We studied functionalized tetraphenyl-21H,23H-porphin (TPP) with (a) SiMe(CH2CH=CH2)2 creating a first generation dendrimer; (b) Si(C6H4SiMeCH2CH=CH2)3 creating a second generation dendrimers. We have observed one and two-domensional self-organization of these molecules from 1-phenyl-octane liquid phase on the basal plane of Highly Oriented Pyrolytic Graphite (HOPG).