Aalto physics colloquium
See the list of previous colloquia
On Friday 15th February 2012 at 15:00 in K building hall 213 (Otakaari 4, Espoo)
Jascha Repp, University of Regensburg
Individual Molecules on Thin Insulating Films
Scanning probe microscopy is an ideal tool to study the properties of individual molecules on the atomic length-scale in a well-defined environment. However, if a molecule is adsorbed onto a metal surface, its molecular identity is partially lost because of the hybridization of its electronic states with the ones of the support. The use of ultra-thin insulating films on metal substrates allows for the almost unperturbed electronic properties of molecules to be studied by means of the scanning probe microscopy techniques as it facilitates an electronic decoupling from the substrate. We investigated different kind of π–conjugated molecules in a combined scanning tunneling (STM) and atomic force microscope (AFM). Whereas both measurement channels show features with sub-molecular resolution, the information they can provide is truly complementary. For example, STM allows the direct imaging of the unperturbed molecular orbitals, whereas the AFM channel directly reveals the bonding geometry in artificial molecular structures and configurational changes in molecular switches.
The event starts with coffee in the lobby of the hall 213 at 15:00, the talk starts at 15:15.
Aalto physics colloquium is a high-level colloquium series covering all branches of physics in the Aalto university. Its aim is to invite high-level physicists from all around the world to tell about their research. The lectures are targeted to all physicists and those interested in physics. Entrance to the events is free of charge. Colloquia are organized approximatively once a month during the term time and the invitation responsibility circulates between all physics professors on the Aalto campus. The colloquium is funded by the Aalto department of Applied Physics, Academy of Finland center of excellence COMP (Computational Nanoscience) and Low Temperature Laboratory.
Aalto University is created through a merger between the Helsinki School of Economics, the University of Art and Design Helsinki and the Helsinki University of Technology. Aalto contains the top Finnish condensed matter physics research units, with specialization especially in materials research, optics, low temperature physics, nanophysics, medical physics and energy technology.
See the general description of the colloquium.
Participating institutes
- O.V. Lounasmaa Laboratory
- Department of Applied Physics
- Department of Biomedical Engineering and Computational Sciences
- Department of Micro and Nanosciences
The coordinator of the event is Tero Heikkilä.