Speaker
Prof.
Stefan Muellegger
(Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria.)
Description
Recent advances have turned the scanning tunnelling microscope (STM) into a single molecule identification tool. We apply a radio frequency STM to excite a single molecule junction based on a polar substituted helicene molecule by an electric field oscillating at 2 to 5 GHz. We detect the dielectric relaxation of the single molecule junction indirectly via its effect of power dissipation, which causes lateral displacement. From our data we determine a corresponding relaxation time of about 300 ps – consistent with literature values of similar helicene derivatives obtained by conventional methods of dielectric spectroscopy.
Author
Prof.
Stefan Muellegger
(Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria.)
Co-authors
Bareld Wit
(Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria.)
Prof.
Eva Rauls
(Institute for mathematics and physics, University of Stavanger, Stavanger, Norway.)
Prof.
Ivo Stary
(Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic.)
Jindrich Nejedly
(Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic.)
Michal Samal
(Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic.)
Mr
Radovan Vranik
(Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria.)
Dr
Simon Feigl
(Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria.)
Dr
Vitalii Stetsovych
(Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Linz, Austria.)
