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DS: Fachverband Dünne Schichten

DS 44: Postersession II

DS 44.50: Poster

Donnerstag, 23. März 2017, 17:00–19:00, P1C

Combinatorial Synthesis of Ni-based Nanoparticles by Sputtering into Ionic Liquids — •Christina Eberling, Gesa Zahn, Christoph Somsen, and Alfred Ludwig — Institute for Materials, Ruhr-Universität Bochum, 44780 Bochum, Germany

Nanomaterials are of great interest for different applications, especially for catalysis, for example in fuel cells. To realize low-cost hydrogen fuel cells, commonly used rare and expensive metals must be replaced by new potential catalysts. High-throughput and combinatorial approaches offer a good possibility to identify promising material combinations in a fast and efficient way. By using combinatorial co-sputter deposition techniques, unary, binary and multinary metal alloys nanoparticles (NPs) can be synthesized with different composition. As a substrate, we use a micromachined cavity array wafer. The cavities are filled with an ionic liquid (IL) that can be handled under vacuum conditions due to its very low vapour pressure. In first experiments, we focused on the fabrication of Ni-based alloy NPs with different compositions in the IL 1-Butyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide ([BMim][Tf2N]), especially Ni-Co and Ni-Mn. Transmission electron microscopy (TEM) measurements show that non-agglomerated, crystalline NPs with a diameter of 3 to 6 nm could be synthesized. In addition, thin films were deposited under the same sputtering conditions and analysed using energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) in order to compare elemental distribution and crystal structure of thin films with those of NPs.