Berlin 2005 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 28: Nano structures
CPP 28.4: Vortrag
Dienstag, 8. März 2005, 16:00–16:15, TU C243
Synthesis of nanostructured transition metal chalcogenides (MQ2, M = Mo, V, Ti, W) — •N. Zink1, H. A. Therese1, F. Rocker1, W. Schermann2, J. Etzkorn1, M. Fleischhammer1, T. Gutjahr1, J. R. Gomm3, L. Löffler3, R. Seshadri3, U. Kolb4, J. Li4, and W. Tremel1 — 1Institut f. Anorg. u. Anal. Chemie — 2Institut f. Org. Chemie, Johannes Gutenberg - Universität, 55099 Mainz — 3Materials Department and Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, CA 93106-5050 — 4Institut f. Phys. Chemie
Nanostructured transition metal chalcogenides of the MQ2-formula have been prepared with different morphologies and properties. The preparation methods used vary from solvo- and hydrothermal and thermal decomposition, over a coating technique and H2S-reduction to MOCVD (metal organic chemical vapour deposition). These materials exhibit tubular, onion- and sheet-like structure respectively in the nano range as shown by high resolution HRTEM studies. The samples were further characterised by XRD, small area electron diffraction (SAED), EDX, and EELS. The materials prepared via the solvothermal route exhibit extremely large surface areas as shown by specific surface area studies (SSA) which make them interesting as catalyst. Reversible Cu-intercalation is possible electrochemically up to the stoichiomtry of Cu0.4MoS2 for MoS2 prepared by MOCVD and by decomposition technique. Rheological studies of the MoS2 prepared by MOCVD show that it can be used as a good lubricant. (Funded by DFG in SFB 625 TP9.)