Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 34: Poster Session
MM 34.20: Poster
Dienstag, 1. April 2014, 18:00–20:00, P4
Core-shell nanoparticles from the gas phase — •Jörg Pribbenow1,2, Alexander Surrey1,3, Darius Pohl1, Ludwig Schultz1,3, and Bernd Rellinghaus1 — 1IFW Dresden, D-01069 Dresden, Germany — 2TU Dresden, IfWW, D-01062 Dresden, Germany — 3TU Dresden, Institut für Festkörperphysik, D-01062 Dresden, Germany
Core-shell nanoparticles allow for the combination of different materials for the creation of systems with a wide range of functionalities. The gas-phase based preparation of such heterogeneous particles is reported here. The cores of the nanoparticles are generated by inert gas condensation in a high-pressure magnetron sputter source. While the latter is already well established, the subsequent in-flight coating of such particles with a second material by linear magnetron sputtering is a rather novel approach. Series of electrostatic lenses provide for collimation and deceleration of unipolarly charged nanoparticles in the coating chamber. The present work is focused on the preparation of particles with a molybdenum or silver core and a copper shell. Aberration-corrected high-resolution transmission electron microscopy (HRTEM) is used to investigate the local structure and chemical composition. The influence of the electrical field profile on the resulting core-shell particles will be discussed.