Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 33: Nanostructures at Surfaces III

O 33.4: Vortrag

Dienstag, 12. März 2013, 11:15–11:30, H45

Interlayer formation of Diamond-Like Carbon Coatings on Polyethylene Plastic Material — •Christian B. Fischer1, Magdalena Rohrbeck1, Stefan Wehner1, Matthias Richter2, Matthias Städter2, and Dieter Schmeißer21Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany — 2Department of Applied Physics and Sensors, Brandenburg University of Technology, 03046 Cottbus, Germany

The coating of materials with diamond-like carbon (DLC) is a very common way to further improve and modify surface specific properties. Although DLC is frequently used as a protective coating on several substrates, the chemical and physical properties throughout the coating process on plastics are yet sparsely investigated. Different layer thicknesses of two types of protective coatings one sp3-enriched (robust, r-type) and one with more sp2-centers (flexible, f-type) have been realized on polyethylene by PECVD. Microscopic analysis showed diverse surface topographies for the two DLC-types. NEXAFS spectroscopy revealed significant details of carbon centers in chemically different neighborhood displaying a characteristic fingerprint behavior. The appropriate explanation for the current carbon deposition process is obviously the formation of an interlayer between these unequal materials. An improved understanding of hard DLC and soft polyethylene assembly is part of the present work.

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