Dresden 2017 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 57: Thin Films, Nanostructures and Nanoparticles I

CPP 57.8: Talk

Thursday, March 23, 2017, 12:15–12:30, ZEU 114

Nanostructure tuning of sputter deposited Al layers on polystyrene using bias voltage — •Stephan V. Roth^1,2, Matthias Schwartzkopf², Björn Beyersdorff², Calvin Brett², Marc Gensch², Wiebke Ohm², Andre Rothkirch², Alexander Hinz³, Oleksandr Polonskyi³, Thomas Strunskus³, Franz Faupel³, Franziska C. Löhrer⁴, Volker Körstgens⁴, Adrian Haussmann⁴, Lorenz Biessmann⁴, and Peter Müller-Buschbaum⁴ — ¹KTH, Teknikringen 56-58,SE-100 44 Stockholm — ²DESY, Notkestr. 85, D-22607 Hamburg — ³CAU, Kaiserstr.2, D-24143 Kiel — ⁴TUM, James-Franck-Str. 1, D-85748 Garching

Nanostructuring the polymer-metal interface in thin films is crucial for organic photovoltaics, flexible electronics and sensors. Hence, we investigated in real-time the different growth kinetics of nanostructured Aluminum layers on polystyrene thin film substrates during DC sputter deposition at applied bias voltages from 0V to -400V and at industrial coating rates. Using grazing incidence X-ray scattering and UV-Vis spectroscopy, we were able to directly correlate the crystallinity, the nanogranular structure and the optical properties at all growth stages during in situ sputter deposition at the applied bias voltages. Electron microscopy confirmed a transition in the nanogranular structure at a bias voltage around -300 V from a densely packed via a worm-like transient stage to a large cluster layer. Our results offer a versatile route for fabricating tailored metal arrays, ranging from nanoparticulate layers to full scale electrical contacts.