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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 56: Focus: Self-Assembly of Plasmonic Nanostructures (joint session CPP/HL)

CPP 56.2: Vortrag

Freitag, 31. März 2023, 10:00–10:15, GÖR 226

In Situ Monitoring of Self-Assembly and Plasmonic Shifts during the Growth of AgCu Alloy Nanostructures — •Matthias Schwartzkopf¹, André Rothkirch¹, Niko Carstens², Thomas Strunskus², Franziska C. Löhrer³, Senlin Xia³, Volker Körstgens³, Peter Müller-Buschbaum^3,4, Franz Faupel², and Stephan V. Roth^1,5 — ¹DESY, Notkestr. 85, D-22607 Hamburg — ²CAU zu Kiel, Kaiserstr.2, 24143 Kiel — ³TUM, James-Franck-Str. 1, D-85748 Garching — ⁴MLZ, Lichtenbergstr. 1, D-85748 Garching — ⁵KTH, Teknikringen 56-58,SE-100 44 Stockholm

While magnetron sputtering is a versatile routine method in industry for the deposition of large area metal and alloy coatings, it can be also used for the preparation of functional nanocomposites with e.g. adjustable optical properties [1]. We investigated in real-time the formation of supported silver, copper, and silver-copper-alloy nanoclusters during sputter deposition on poly(methyl methacrylate) by combining in situ surface-sensitive X-ray scattering with optical spectroscopy [2]. While following the transient growth morphologies, we quantify the early stages of phase separation at the nanoscale, track the shifts of surface plasmon resonances, and quantify the growth kinetics of the nanogranular layers at different thresholds. We are able to extract the influence of scaling effects on the nucleation and phase selection and demonstrate a route to tailor accurately the plasmon resonances of nanosized, polymer-supported clusters. [1] Faupel et al., Adv. Eng. Mater. 2010, 12, 12, 1177-1190. [2] Schwartzkopf et al., ACS Appl. Nano Mater. 2022, 5, 3, 3832-3842.