Growth of an oligopyridine adlayer on Ag(100) - a scanning tunnelling microscopy study

Waldmann, Thomas and Nenon, Christina and Hoster, Harry E. and Behm, R. Juergen (2011) Growth of an oligopyridine adlayer on Ag(100) - a scanning tunnelling microscopy study. Physical Chemistry Chemical Physics, 13 (46). pp. 20724-20728. ISSN 1463-9076

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The growth behaviour of the oligopyridine derivative 2-phenyl-4,6-bis(6-(pyridine-2-yl)-4-(pyridine-4-yl) pyridine-2-yl) pyrimidine (2,4'-BTP) on Ag(100) in the sub-monolayer regime was investigated by variable temperature scanning tunneling microscopy under ultra-high vacuum conditions. Over the entire coverage range, the molecules are adsorbed in a flat lying configuration, with preferential orientations with respect to the <110 > direction of the surface. The azimuth angles are derived using a previously introduced algorithm that fits the positions of the intramolecular N atoms geometrically to the underlying surface lattice ("points-to-lattice fit") [H. E. Hoster et al., Langmuir 2007, 23, 11570], indicating that the orientation of the admolecules and thus of the adllayer structure with respect to the Ag(100) surface lattice is determined by the 2,40-BTP - Ag(100) interaction, while intermolecular interactions are decisive for the structure of the adlayer. The results will be compared to other adsorption systems.

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Physical Chemistry Chemical Physics
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13 Feb 2015 13:39
Last Modified:
22 Nov 2022 01:34