Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory

O 36.18: Poster

Tuesday, April 1, 2014, 18:30–22:00, P1

Ion beam-induced nanoscale surface modulations and their effect on protein-surface adsorption — •Alexander von Müller, Jana Sommerfeld, and Carsten Ronning — Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Helmholtzweg 3, 07743 Jena

Under specific experimental conditions, the irradiation of solid surfaces with ions can result in periodic surface modulations at the nanoscale. This effect of ripple formation is widely discussed in the literature and has been observed on many different types of materials - e.g. semiconductors, amorphous materials, graphite, and metals [1,2]. We will present results of experiments in which we have tested the biocompatibility of such ion beam-induced surface morphologies by studying their effects on the surface adsorption behaviour of human plasma fibrinogen (HPF) proteins. The nanopatterned surfaces have been created by irradiation of different substrates with low-energy ions (< 20 keV). Both the effects of the irradiations and the adsorption of the proteins have been studied by means of atomic force microscopy (AFM).

[1] Nanostructuring surfaces by ion sputtering, U. Valbusa, C. Boragno, F. Buatier de Mongeot, J. Phys: Condens. Matter, 2002, 14, 8153-8175

[2] Ion-Induced Nanoscale Ripple Patterns on Si Surfaces: Theory and Experiment, A. Keller, S. Facsko, Materials, 2010, 3, 4811-4841