Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MM: Fachverband Metall- und Materialphysik
MM 46: Nanomaterials I
MM 46.3: Vortrag
Donnerstag, 29. März 2012, 10:45–11:00, H 1029
Metallic nanowire growth from solution using dielectrophoresis — •Alexander Nerowski1, Markus Pötschke1, Manfred Bobeth1, Larysa Baraban1, Jörg Opitz1,2, and Gianaurelio Cuniberti1 — 1Institute for Materials Science and Max Bergmann Center of Biomaterials, TU Dresden, 01062 Dresden, Germany — 2Fraunhofer-Institute for Non-Destructive Testing, 01109 Dresden, Germany
Growth of metal nanowires from solution is a promising "bottom-up" method which can represent an efficient alternative to classical lithography. Here we present a dielectrophoretic growth of nanowires on an amorphous glass substrate in a solution containing Pt-complexes. Aiming at a controlled growth of straight and as thin as possible wires, the growth process is investigated both in theory and experiment. The metallic nanowire tip is modeled as a sphere electrode. The model includes the dielectrophoretic force on uncharged metal complexes as well as their diffusion in the solution. Experimental data suggest that the deposition process traverses from reaction-limited to diffusion-limited when going from low to high temperatures. Possible reasons for the rate limitation are discussed. Potassium ions in the solution are found to have a great influence on the deposition rate. Finally, we compare the experimentally measured growth velocities with those theoretically calculated.