Dresden 2006 – scientific programme
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O: Oberflächenphysik
O 29: Poster session II (Nanostructures, Magnetism, Particles and clusters, Scanning probe techniques, Time-resolved spectroscopy, Structure and dynamics, Semiconductor surfaces and interfaces, Oxides and insulators, Solid-liquid interfaces)
O 29.6: Poster
Wednesday, March 29, 2006, 14:30–17:30, P2
Double layers from polycyclic aromatic hydrocarbons as studied by STM and STS — •Min Ai1, Frank Jäckel1, Ji shan Wu2, Klaus Müllen2, and Jürgen P. Rabe1 — 1Humboldt University Berlin, Department of Physics, Newtonstr. 15, 12489 Berlin — 2Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz
We present the investigation of functionalized hexa-peri-hexabenzocoronenes (HBC) by scanning tunneling microscopy (STM) and spectroscopy (STS) at the liquid-solid interface. For star-shaped HBC derivatives different mono- and double layer structures were observed depending on the solvent that can be incorporated [1]. For composites of electron rich HBC derivatives (donors) with electron acceptors different architectures were observed, some of which can be solved with atomic precision using as additional information the spectroscopic data obtained from STS [2]. The potential for prototypical single-molecule electronic devices is discussed.
[1] Jäckel, F.; Ai, M.; Wu, J.; Müllen, K.; Rabe, J.P. J. Am. Chem. Soc. 2005, 127, 14580. [2] Jäckel, F.; Watson, M.D.; Müllen, K.; Rabe, J.P. submitted.