Dresden 2009 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 36: Magnetic Particles and Clusters II

MA 36.1: Vortrag

Donnerstag, 26. März 2009, 15:15–15:30, HSZ 401

Ligand-dependence of longterm stability of cobalt nanoparticles — •Britta Vogel, Axel Dreyer, Nadine Mill, Anna Regtmeier, Inga Ennen, Daniel Ebke, Simone Herth, and Andreas Hütten — Department of Physics, University of Bielefeld, D-33615 Bielefeld, Germany

Cobalt nanoparticles with a diameter of 12nm have initially been prepared with TOPO. Subsequently a ligand exchange was carried out so as to employ the ligand of choice to the nanoparticles. The effect of different ligands on the change of the magnetic moment of the particles was investigated systematically by using ligands with two different head groups, several different chain lengths with and without double bond, several numbers of chains and two ligands with benzene rings. The samples were stored at different temperatures to gain insight into the temperature dependence of the oxidation.