Research group Prof. Dr. Jürgen Janek
Physical chemistry of solids – solid state ionics and electrochemistry
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The research of our group is directed towards the physicochemical basis of solid state processes, that are important for modern energy and interface technologies.
The research group is located in the Institute of Physical Chemistry on the Science Campus at the Heinrich-Buff-Ring 58 (Chemistry Building). The secretariat is located in the 9th floor of the building (room 931). If you plan to visit us, you will find a short description of the way to the institute under .
"How to find us".
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Here you can find alternating insights into our research group. Enlarged versions of all published pictures can be found here.
Using vapour deposition methods small deviations of process parameters (substrate temperature, process pressure, etc.) can alter the resulting morphology of the sample significantly. Furthermore, targets used for pulsed laser deposition are exposed to high energy densities and thus can undergo structural changes. The images shown above shall illustrate these aspects.
PbTe crystallizes in a rock salt structure. Therefore, trigonal patterns are characteristic of (111)- and quadratic patterns of (200)-crystallite orientation. By modifying the process pressure, different preferred orientations could be realized (independently from the substrate). The scanning electron micrographs (a) and (b) reveal preference of (111)-orientation and (c) of (200)-orientation respectively.
Variations of target constitution due to impinging laser beams are exemplarily shown in (d) by a resulting columnar structure of Na0.7CoO2.
(Picture submitted by Patrick Schichtel and Christian Schneider)
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Nanonetwork Hessen (Germany)
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DFG-priority program 1136
"Substitutional effects in ionic solids (e.g. oxynitrides)"
(Coordinators: Prof. J. Janek/U Gießen, Prof. M. Binnewies/U Hannover)
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DFG-priority program 1191
"Ionic Liquids"
(Coordinator: Prof P. Wasserscheid/U Erlangen)
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DFG-priority program 1415
"Kristalline Nichtgleichgewichtsphasen"
(Coordinators: Prof W. Bensch/U Kiel, Prof J. Breu/U Bayreuth)
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HE-Lion (LiB 2015 Konsortium - bmbf) |
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Arbeitsgemeinschaft industrieller Forschungsvereinigungen
"Otto von Guericke" e.V.
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gefördert durch das
Bundesministerium für Bildung und Forschung
(BMBF)
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DFG-Projektverbund
"Lithium-Hochleistungsbatterien"
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08.08.2012 13:34
