Dresden 2009 – scientific programme
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O: Fachverband Oberflächenphysik
O 4: Metal substrates: Adsorption of organic / bio molecules I
O 4.2: Talk
Monday, March 23, 2009, 11:30–11:45, SCH A118
Perpendicular Interaction between Donor and Accepter Molecules — Gayani Perera1, Ryota Mishima1,2, and •Saw-Wai Hla1 — 1Ohio University, Physics and Astronomy Department, Athens, Ohio 45701, USA. — 2Division of Material Physics, Graduate School of Engineering Science, Osaka University, Japan.
The capability to modify the electronic properties of materials by the interaction between donor and acceptor molecules plays a significant role in molecular electronics. Formation of molecular charge transfer complexes have been observed for different donor acceptor system in a lateral configuration [1]. Here, we present the structural and electronic properties of decamethylmanganocene (Mn(C5Me5)2) and 7,7,8,8-tetracyanoquinodimethane (TCNQ ) molecules on a Au(111) surface at 4.6K using low temperature scanning tunneling microscopy to investigate the perpendicular interaction between the molecules. The molecular complexes are formed by depositing Mn(C5Me5)2 on predeposited TCNQ on Au(111) surface. TCNQ formed well ordered self assembled domains of molecules. Perpendicular interaction between the Mn(C5Me5)2 and TCNQ were determined by means of conductance tunneling spectroscopy. This work is supported by the Ohio University BNNT, National Science Foundation NSF-DMR 0304314, NSF-PIRE: OISE 0730257, and the United States Department of Energy, DE-FG02-02ER46012 grants. [1] F. Jackel, U.G.E. Perera, V. Iancu, K.-F. Braun, N. Koch, J.P. Rabe and S.-W. Hla, Phys. Rev. Lett. 100 (2008) 126102.