Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 24: Adsorption III
O 24.10: Vortrag
Dienstag, 28. März 2006, 18:00–18:15, TRE Phys
Organic Molecule Intercalation in TaS2 — •Sujit Kumar Dora and Olaf Magnussen — Institut für Experimentelle und Angewandte Physik, Christian-Albrecht-Universität, Germany, Leibnizstr. 19, 24118 Kiel
Transition metal dichalcogenides are ideal host materials for the intercalation of organic molecules, resulting in large change of structural and electronic properties. In this study the atomic-scale mechanisms of the electrochemical intercalation/deintercalation of pyridine and octylamine (both 0.01 M solution pH 3) in 1T−TaS2 was investigated by in-situ electrochemical STM and cyclic voltammetry. Intercalation starts at potentials negative of −0.45 V vs SCE. The STM observations show characteristic structural changes in the surface morphology during this process indicating an important role of surface defects, such as holes and steps. In particular, the formation of holes, step flow etching and the formation of small islands of submanolayer height were observed.