Dresden 2011 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 62: Organic Thin Films I

DS 62.2: Vortrag

Freitag, 18. März 2011, 10:30–10:45, GER 38

Structure formation during deposition of organic films on inorganic substrates - experiments vs. modeling — •Florian Szillat and S. G. Mayr — Leibniz-Institut fuer Oberflaechenmodifizierung, Translationszentrum fuer regenerative Medizin und Fakultaet fuer Physik und Geowissenschaften der Universitaet Leipzig, 04318 Leipzig

Organic-inorganic interfaces are of strongly increasing scientific interest, as they occur in a broad range of areas, including biomaterials and organic semiconductors. Detailed experimental and theoretical understanding - in particular of the inorganic/organic interaction and the resulting implications with respect to mechanical properties and structure - is still lacking. In the present study we investigate organic thin films which are grown from vapor on metal surfaces and focus on structure evolution during growth. Whereas poly(bisphenol A) carbonate - as a model system - is deposited via thermal evaporation. Characterization of structure formation is based primarily on atomic force microscopy measurements. Complementary, stochastic rate equations with surface free energy and interface potential driven surface diffusion as a central process are employed to model structure evolution. From an excellent agreement of experiments and simulations conclusions on the interface potential as well as underlying physics of structure formation can be drawn. This project is funded by the German BMBF, PTJ-BIO, Grant Number: 0313909
C. Vree and S.G. Mayr, Applied Physics Letters 94 (2009) 093110