Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 109: Tribology and Structure of Surfaces: Misc.
O 109.6: Vortrag
Freitag, 24. März 2017, 12:00–12:15, WIL A317
Dipole-mediated single-molecule manipulation — •Grant Simpson1, Víctor García-López2, James Tour2, and Leonhard Grill1 — 1University of Graz, Graz, Austria — 2Rice University, Houston, Texas, USA
It has been long known that the scanning tunneling microscope (STM) is the perfect tool not only for imaging single molecules on surfaces, but also can be used to manipulate such molecules in a variety of ways. The classical method of lateral manipulation is either pushing or pulling via van der Waals interaction with the STM tip. In the current work it is shown that the electric field of the tip plays an important role when a dipole moment exists within a molecule. The dipolar nanocar, investigated here on the Ag(111) surface, displays rotational and translational motion under the influence of the electric field of the tip. Furthermore, the spatial dependence of the tip position with respect to the molecule reveals that the dipole moment of the molecule is the deciding factor for the direction of motion. The rotation and translation of the nanocar can therefore be carefully controlled.