Regensburg 2016 – scientific programme

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O: Fachverband Oberflächenphysik

O 97: Nanostructured Surfaces and Thin Films

O 97.4: Talk

Friday, March 11, 2016, 11:15–11:30, S053

Comparative study of amorphous hydrogenated carbon (a-C:H) layers on Si (100) and high-density polyethylene (HDPE) — •Christian B. Fischer, Alberto Catena, and Stefan Wehner — Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany

Silicon and high-density polyethylene (HDPE) have been gradually covered by thin a-C:H films with acetylene-plasma to study the interlayer forming behavior between the base material and carbon coating. Two different carbon coatings, one with indirect (f-type) and one with direct (r-type) deposition, were realized. Surface characteristic studies by atomic force microscopy (AFM) showed an unexpected similar morphology for both types and materials. The analysis of average height and area for single evolving grains over uniformly textured protrusions at the bottom revealed a smaller amount of carbon deposition for the f-type than for the r-type to obtain similar morphologies independently of the chosen basic material. The average grain area increases for all f- and r-depositions. The average grain height increases in the beginning and approaches a level with nearly constant height. Furthermore, the values of the average grain heights are correlated to the values of the average grain areas and are localized in a limited area, indicating a given regularity throughout the different carbon depositions.