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Hassel Lecture 2008

The Norwegian Chemical Society (NKS) and the Department of Chemistry, University of Oslo, invite you to attend two lectures to be given by this year’s Hassel Lecturer: Prof. Hans-Joachim Freund, Department of Chemical Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany.
Title of the Hassel Lecture:
“Metal atoms and clusters on thin oxide films: Systems with designable properties”
Where:
Auditorium 1, Department of Chemistry
When:
Tuesday, May 20 at 11:15 a.m.

Abstract:
Well ordered oxide films may be prepared with atomic precision on metal substrates. Such surfaces lend themselves to substrates for the growth of metal clusters and nanoparticles which may be studied at the atomic scale using spectroscopic and scanning probe techniques. It is possible to study the properties of atoms, clusters and nanoparticles on the oxide as a function of oxide larger thickness. It will be demonstrated how this may be used to prepare systems with designable properties. While these systems are of general interest there is particular interest in heterogeneous catalysis.

The Hassel Seminar:
Prof. Freund will also give an additional seminar the following morning.
Title of the seminar:
“Chemistry on Supported Nanoparticles: Model Studies”
Where:
Auditorium 3, Department of Chemistry
When:
Wednesday, May 21 at 10:15 a.m.

Abstract for the Hassel Seminar
Model catalyst systems have been prepared by growth of metal nano-aggregates on thin well-ordered oxide films of alumina and silica. These systems lend themselves to structural and morphological characterization via scanning probe microscopies and transmission electron microscopy and bridge to a certain extent the materials gap between metal single crystal studies and the investigation of real catalyst samples. It is possible to infer direct structure-reactivity relations when simple reactions of small molecules are studied. We have applied a variety of surface sensitive techniques, both under ultrahigh vacuum as well as under ambient conditions to relate observations from surface science to those in catalysis under realistic gas pressure conditions. Both thermal and photo-induced reactions have been studied.