Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 39: POSTERS Colloids and Liquids
CPP 39.8: Poster
Donnerstag, 26. März 2009, 17:00–19:30, P3
Pt- and FePt- nanoparticles on the basis of emulsion techniques — •Achim Manzke1, Stefan Wiedemann1, Fabian Enderle1, Alfred Plettl1, Paul Ziemann1, Eyk Schreiber2, Ulrich Ziener2, Katharina Landfester2, Johannes Biskupek3, and Ute Kaiser3 — 1Institut für Festkörperphysik, Universität Ulm, D-89069 Ulm — 2Institut für Organische Chemie III, Universität Ulm, D-89069 Ulm — 3Materialwissenschaftliche Elektronenmikroskopie, Universität Ulm, D-89069 Ulm
Metal-precursor loaded colloidal polystyrene (PS) particles in aqueous solution are produced by an emulsion and miniemulsion technique, respectively [1]. We will report on colloids loaded with Pt- as well as with Fe- and Pt- complexes. After deposition of a hexagonally ordered monolayer of PS spheres on top of a silicon substrate, optimized plasma and temper sequences are applied to obtain metallic nanoparticles which still exhibit the original lateral order. The metal content within a colloid defines the size of the final particle, which could be varied between 6 and 14 nm, so far. The interparticle distance is determined by the diameter of the starting PS- particles and was varied between 80 and 250 nm. EDX- and ICP-OES- measurements were carried out to investigate the chemical composition of the colloids. For example, a ratio of Fe : Pt = 1 could be achieved with the miniemulsion technique. HRTEM- images demonstrate the crystalline structure of the Pt- and FePt- nanoparticles.
[1] A. Manzke et al. Adv. Mater. 19, 1337 (2007)