Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 49: Poster: Nanostructures on Surfaces I
O 49.23: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster A
Charge distribution within nanostructures of molecular dipoles on Au(111) — •Sergey Trishin1, Daniela Rolf1, Philipp Rietsch2, Christian Lotze1, Siegfried Eigler2, and Katharina J. Franke1 — 1Freie Universität Berlin, Fachbereich Physik — 2Freie Universität Berlin, Institut für Chemie und Biochemie
Donor-acceptor molecules have been investigated widely, because they offer suitable electronic characteristics for a possible use in electronic devices, such as single-molecule diodes or transistors. When deposited on a surface, the charge distribution within the molecule may change significantly due to screening and hybridization effects. Here, we investigate the N2-ethane-tetracyano-quino-dimethane molecule on a Au(111) surface, which exhibits a large dipole moment in gas phase. On the Au(111) substrate, the molecules form ordered self-assembled chains of varying width. Employing non-contact AFM at low temperature, we measure the local contact potential difference (LCPD). We show that the molecules still exhibit a distinct dipole character on the substrate. The dipole moment depends on the width of the molecular chains.