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apl. Prof. Dr. Heinz Hövel

Department of Physics
Otto-Hahn-Str. 4a
44227 Dortmund

Room: CP-E1-137
E-Mail: heinz.hoeveltu-dortmundde
Tel.: +49 (0)231 755-3521

Portrait of Heinz Hövel © Jürgen Huhn​/​TU Dortmund

Secretariat

"We study nanostructures in the sense of an intermediate region between atom and solid. In order to be able to study the size-dependent changes precisely, mass-selected "clusters" in particular are used, i.e. nanoparticles with a few up to a few thousand atoms. These are generated in ultra-high vacuum and selected according to their mass using ion optics. For clusters of up to about 50 atoms, this succeeds down to the single atom. If one wants to exploit the enormous potential of the often novel and strongly size-dependent properties of the clusters for applications such as catalysis or nanoelectronics, they generally have to be deposited on a surface. This creates new challenges. In sample preparation, we succeed in depositing the clusters gently and stably on surfaces specially prepared for this purpose. For the physical interpretation, the coupling to the surface creates an additional complexity, but also new and interesting effects. The main measurement methods used are scanning tunneling microscopy and spectroscopy as well as photoelectron spectroscopy, but other investigation methods such as electron diffraction or optical spectroscopy are also used. Ultra-high vacuum and low temperatures down to 5 K allow the preparation and investigation of even very sensitive sample systems. Furthermore, the low temperatures allow measurements with highest spatial and energy resolution. Thus, in the direction of future applications, we are looking for novel "cluster materials" that take advantage of the properties of cluster surface systems and, if possible, remain stable at temperatures up to room temperature or higher."

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Location & approach

The campus of the Technical University of Dortmund is located near the freeway junction Dortmund West, where the Sauerland line A45 crosses the Ruhr expressway B1/A40. The Dortmund-Eichlinghofen exit on the A45 leads to the South Campus, the Dortmund-Dorstfeld exit on the A40 leads to the North Campus. The university is signposted at both exits.

The "Dortmund Universität" S-Bahn station is located directly on the North Campus. From there, the S-Bahn line S1 runs every 20 or 30 minutes to Dortmund main station and in the opposite direction to Düsseldorf main station via Bochum, Essen and Duisburg. In addition, the university can be reached by bus lines 445, 447 and 462. Timetable information can be found on the homepage of the Rhine-Ruhr transport association, and DSW21 also offer an interactive route network map.

 

 

One of the landmarks of the TU Dortmund is the H-Bahn. Line 1 runs every 10 minutes between Dortmund Eichlinghofen and the Technology Center via Campus South and Dortmund University S, while Line 2 commutes every 5 minutes between Campus North and Campus South. It covers this distance in two minutes.

 

 

From Dortmund Airport, it takes just over 20 minutes to get to Dortmund Central Station by AirportExpress and from there to the university by S-Bahn. A wider range of international flight connections is offered by Düsseldorf Airport, about 60 kilometers away, which can be reached directly by S-Bahn from the university's train station.

Interactive map

The facilities of TU Dortmund University are spread over two campuses, the larger Campus North and the smaller Campus South. Additionally, some areas of the university are located in the adjacent "Technologiepark".

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