| Autors: Dineff, P. D., T. Vladkova., Gospodinova, D. N., I. Keranov. Title: Plasma immersed ion beam etching and fictionalization of polydimethylsiloxane surfaces Keywords: argon plasma etching, atomic force microscopy, contact angle Abstract: Modification of polymer surfaces by changing the chemical structure, surface energy, and bonding characteristics is of considerable technological importance for the area of biocompatibility. In recent years, the interest was increasingly directed to plasma oxidized polydimethylsiloxane surfaces as a bioactive substrate having the capacity of interacting with a live tissue or system. New plasma immersed argon ion beam technology for controlled oxidization and mineralization of PDMS-surfaces was studied both for academic purposes and in view of its practical application. These modification techniques affected only a shallow surface region of approximate thickness 5 10 nm, while the bulk properties of the polymer were unaffected. The photoelectron spectroscopy for chemical analysis (ESCA) technique was used to characterize the surface chemistry modified by argon ion beam bombardment and atmospheric pressure air oxidation. Contact angle measurements were used to determine the polar and References Issue
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