Skip to content.

TUD

search  |  internal  |  deutsch
Personal tools
TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2012.04.25-27




STM controlled manipulation of single molecules and molecular structures

F. Moresco

3rd European Nanomanipulation Workshop

2012.04.25-27; Barcelona, Spain

Low temperature scanning tunneling microscopy (LT-STM) experiments on molecules permit a deeper insight into the quantum electronics of molecular systems and provide important information on the conformational and mechanical properties of single complex molecules.

Several methods have been developed in the last years to manipulate molecules using STM, including lateral, vertical, and electrical induced manipulation. In this talk, experiments will be reviewed, where the manipulation process can be controlled by varying one of three main parameters: the electric field, the tunneling current and the forces between tip and surface. In this way, molecules can be exactly positioned on a metal surface and conformational changes can be induced.

Moreover, the electrically controlled manipulation of supramolecular structures will be presented, showing that a structure can be moved collectively in a controlled way. Depending on the applied voltage, several types of movements (translation, rotation, reorganization) of a structure comprised of four 4-Acetylbiphenyl molecules on Au(111) are achieved. By applying consecutive pulses, the structure can be manipulated over larger distances in defined directions. The experiments show a novel possibility to softly and purely electrically manipulate nanostructures on metal surfaces in view of assembly nanoscale devices.



abstract (pdf)

conference announcement (html)



people| research | teaching | links | internal | home

last modified: 2017.03.20 Mo
author: webadmin

contact
Prof. Dr. Gianaurelio Cuniberti
secretariat:
Ms Sylvi Katzarow
phone: +49 (0)351 463-31420
fax: +49 (0)351 463-31422
office@nano.tu-dresden.de
postal address:
Institute for Materials Science
TU Dresden
01062 Dresden, Germany
visitors and courier address:
HAL building
TU Dresden
Hallwachsstr. 3
01069 Dresden, Germany
Max Bergmann Center
TU Dresden
Budapester Str. 27
01069 Dresden, Germany