Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 33: Nanostructures at surfaces: arrays
O 33.4: Vortrag
Dienstag, 23. März 2010, 15:45–16:00, H31
Photochemical deposition of gold on ordered FePt nanoparticle arrays — •Thomas Härtling1, Tino Uhlig1, Axel Seidenstücker2, Ulf Wiedwald2, Alfred Plettl2, Paul Ziemann2, Lukas M. Eng1, and Phillip Olk1 — 1TU Dresden, Institut für Angewandte Photophysik, 01062 Dresden (Germany) — 2Universität Ulm, Institut für Festkörperphysik, 89069 Ulm (Germany)
Gold-coated magnetic nanoparticles are interesting candidates for biomedical, magneto-optical, or data storage applications. The gold coating of the particles improves their stability as well as biocompatability, and broadens the possibilities for surface functionalization.
Here we use a photochemical approach to deposit an ultrathin gold shell around FePt nanoparticles arranged in a two-dimensional, hexagonally ordered array. We investigate the deposition process, the qualitiy of the gold coating, and the magnetic properties of the core-shell particles obtained with our technique. First results indicate an improved long-term stability of the magnetization.