Regensburg 2010 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 29: Poster: Molecular Spintronics, Biomolecular and Functional Organic Layers, Organic Electronics and Photovoltaics, Plasmonics and Nanophotonics, Organic Thin Films, Nanoengineered Thin Films, Thin Film Characterisation,
DS 29.50: Poster
Mittwoch, 24. März 2010, 15:00–17:30, Poster A
Characterization of Plasma Polymerized Ethylenediamine Thin Films for Biomedical Applications — •Frank Wienholtz, Holger Testrich, and Jürgen Meichsner — Institute of Physics, University of Greifswald, Felix-Hausdorff-Str. 6, 17487 Greifswald
Plasma polymerized ethylenediamine (PPEDA) thin films (15 - 80 nm) were deposited on different substrate materials (TiOx, Si, Al) in capacitively coupled radio frequency plasma. Beside the optimization of the plasma processing parameters, the plasma chemical conversion of the precursor ethylenediamine (EDA) was studied by means of the plasma induced optical emission spectroscopy, analysing the CN emission at 384 nm as well as the emission of Hα (656 nm) and Ar (750 nm). The FTIR (IRRAS) absorption spectra of deposited thin films reveal characteristic absorption of NH (3000 and 3500 cm−1), CH (2900 cm−1), CN/CC (2150 cm−1), and NH2 (1600 cm−1). Comparing the thin film spectra with that of the liquid precursor EDA, the films are strongly cross linked. The refractive index shows normal dispersion in the visible spectral region, and in dependence on the deposition parameters anomal dispersion in the UV. The XPS analysis combined with derivatisation technique provides information about the NH2 functional groups. Biomedical test substrates covered with PPEDA thin films show significant increase in cell adhesion. The investigations were realized within the BMBF collaborative research project "Campus PlasmaMed", grant no 13N9774.