Dresden 2011 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 31: Postersitzung II

MM 31.27: Poster

Mittwoch, 16. März 2011, 17:15–18:45, P5

Study of the silver ion release from antimicrobial nanosilver (nAg)/PTFE two dimensional (2D) model — •Nisreen Alissawi¹, Vladimir Zaporojtchenko¹, Thomas Strunskus¹, Dieter Garbe-Schönberg², and Franz Faupel¹ — ¹Institute for Materials Science-Multicomponents Materials, Christian-Albrechts-University, Kaiserstr.2, 24143, kiel — ²Dept. of Geology/ ICPMS Lab, CAU Kiel, Ludewig- Meyn-Strasse 10, 24118 Kiel

Despite the great interest in silver based antimicrobial nanocomposites, it is still not clear how the composite morphology (nanoparticle size, concentration, and distribution) affect the mechanism and kinetics of the interfacial ion transfer reactions of the Ag nanoparticles due to the fact that metal nanoparticles embedded in a polymeric matrix are not directly accessible concerning their interfacial structure and reactivity. This problem will be approached in our present work by the usage of well defined model systems consisting of 2D nanoparticle arrays which are either directly accessible or covered by polymer barrier. The Ag nanoparticles and the PTFE polymer layers were synthesized by physical vapor deposition (PVD) techniques. The samples' morphology, optical properties and composition were examined by Transmission Electron microscopy (TEM), UV-Visible Spectroscopy (UV-Vis) and X-Ray Photoelectron Spectroscopy (XPS), respectively, and the time-dependent release of silver ions after inserting in water was measured using Inductively coupled plasma mass spectrometry (ICP-MS). Time dependence of silver ions release on the particle size and barrier properties are discussed.