Prof. Dr.
Michael Tiemann

Faculty of Science,
Department of Chemistry

Warburger Str. 100
D-33098 Paderborn

phone:+49 (0) 5251.60.2154
fax:+49 (0) 5251.60.3423

secr.Britta Fremerey
phone:+49 (0) 5251.60.2495


Inorganic Functional Materials

Functional materials play a vital role in modern technology and in everyday life. For example, materials of high mechanical strength are frequently utilized in automotive or aircraft construction; energy and resources management has become more efficient by utilization of fuel cells or light-emitting diodes; microelectronics and telecommunication benefit from modern semiconductor technology. These are just a few examples of the large number of applications which result from the development of new materials with defined properties and functions.

Particular focus lies on nanomaterials, i.e. materials with structures in the size region of a few nanometers (a nanometer is a billionth meter). Such materials often possess special properties different from those of substances in classical molecular or solid-state chemistry. This leads to new applications in such fields as energy conversion, catalysis, medicine, or sensing.

The 'Inorganic Functional Materials' group (Prof. Michael Tiemann) is primarily concerned with nanoporous materials, e.g. metal oxides, silica, or carbon. These materials contain uniform and regular voids or channels of a few nanometers in diameter as well as very large specific surface areas of several hundred square meters per gram. This results in potential applications in such fields as gas sensing, catalysis, or with respect to optical properties.

The picture shows an electron microscopic image of nanoporous indium oxide (In2O3). In the magnification of a single particle of ca. 300 nanometers in diameter (upper right corner) the regularly arranged nanopores are visible. This material exhibits interesting properties as a gas sensor.

Another field of activity of the group is focused on studying the mechanisms of origin and growth of nanostructures. Apart from interesting insights into fundamental scientific issues, this topic also provides direct utility, since better knowledge about such processes may open up new opportunities to create novel nanomaterials with specific function.

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