Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 68: Nanostructures at Surfaces: 1D, 2D Structures and Networks
O 68.14: Poster
Wednesday, March 9, 2016, 18:15–20:30, Poster A
"Nunchakus"molecules at metallic surfaces investigated by scanning tunneling microscopy — •lacheng liu1,2, hongying gao1,2, philipp held3, armido studer3, and harald fuchs1,2 — 1Center for Nanotechnology, Heisenbergstr. 11, 48149 Muenster, Germany — 2Physikalisches Institut, Westfalische Wilhelms-Universitat, Wilhelm-Klemm-Str. 10, 48149 Muenster, Germany — 3Organisch-Chemisches Institut and Center for Mutiscale Theory and Simulation, Westfalische Wilhelms-Universitat, Corrensstr. 40, 48149 Muenster, Germany
Scanning tunneling microscopy(STM) is demonstrated to be a useful tool to investigate the molecular conformation on metallic surfaces with atomic-scale resolution. In this work we study the adsorption conformations and self-assembly structures of four different "Nunchakus" shaped molecules: Bis(2-naphthyl) peroxide, 2-Naphthoic anhydride, Bis(2-naphthyl)ethanedione and trans-1,2-Bis-(2-naphthyl)ethene. Different metal substrates Au(111), Ag(111) and Cu(111) were tested, to reveal the interaction between organic molecules and metal surfaces. For these nuchakus shaped molecules, different adsorption conformations even on the same metallic surface were identified. The center to center distances of 2-Naphthyl groups of one molecule were measured, which are shorter than the ones in gas phase due to the specific interaction between O atoms and metallic surface atoms which leads to the tortuosity of the molecules.