Dresden 2017 – wissenschaftliches Programm
MM 63.3: Vortrag
Donnerstag, 23. März 2017, 12:30–12:45, IFW D
Single target sputter deposition of alloy nanoparticles with adjustable composition via gas aggregation cluster source — •Alexander Vahl1, Julian Strobel2, Wiebke Reichstein1, Oleksandr Polonskyi1, Thomas Strunskus1, Lorenz Kienle2, and Franz Faupel1 — 1Christian-Albrechts University at Kiel, Institute for Materials Science, Chair for Multicomponent Materials, Kaiserstr. 2, 24143, Kiel, Germany — 2Christian-Albrechts University at Kiel, Institute for Materials Science, Chair for Synthesis and Real Structure, Kaiserstr. 2, 24143, Kiel, Germany
Over the past decades, noble metal nanoparticles were well studied regarding their catalytic and optical properties. Recently, alloy (noble) metal nanoparticles gained increased interest for their additional degree of freedom to tailor properties like particle plasmon polaritons. In this work we present a simple approach to prepare noble metal alloy nanoparticles with good control over size and size distribution as well as composition. Employing a Haberland type single DC magnetron gas aggregation cluster source with a multicomponent target, AgAu alloy nanoparticles with tunable composition were embedded into a SiO2 matrix (pulsed reactive DC sputtering). Nanocomposite analysis (TEM, UV-vis, XPS) revealed the possibility of concentration variation of about 15% and a corresponding shift of the plasmonic absorption band by about 20nm.