Berlin 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 73: Surface dynamics: Reactions, elementary processes and phase transitions II
O 73.3: Vortrag
Mittwoch, 14. März 2018, 17:15–17:30, MA 043
Rotation and Translation of a Single Molecular Dipole — •Grant J. Simpson1, Víctor García-López2, James M. Tour2, and Leonhard Grill1 — 1University of Graz, Graz, Austria — 2Rice University, Texas, USA
Controlling matter on the atomic scale using the tip of a scanning tunneling microscope (STM) is now a well-established field. The *pushing* and *pulling* STM manipulations employ rather close-range interactions and can be used to position single atoms and molecules on a surface with exquisite precision. Furthermore, a number of molecular processes such as rotation and conformational switching can be induced through inelastic electron tunneling or through interaction with the electric field in the STM junction. Gaining control over the direction of rotation and translation of single molecules is more challenging though. In the current work it is shown that an in-built permanent molecular dipole can be used to achieve a high degree of control over the motion of a single molecule. Through interaction of this dipole with the electric field of the tip, unidirectional rotation and translation is demonstrated [1]. Additionally, by mapping the behavior of this motion, it is possible to visualize the internal electric dipole in a single molecule.
[1] G. J. Simpson, V. García-López, P. Petermeier, L. Grill, and J. M. Tour, Nat. Nanotechnol. 12 (2017) 604.