Regensburg 2013 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 13: Poster Session III: Layer properties: electrical, optical and mechanical properties; Thin film characterization: structure analysis and composition (XRD, TEM; XPS, SIMS, RBS..)

DS 13.8: Poster

Montag, 11. März 2013, 17:00–20:00, Poster B1

Stress induced wrinkling in laser deposited polymer/metal-nanocomposites — •Anja Westphal, Susanne Schlenkrich, Felix Schlenkrich, Stephanie Demuth, and Hans-Ulrich Krebs — Universität Göttingen, Institut für Materialphysik, Friedrich-Hund-Platz 1, D-37077 Göttingen

Wrinkling of metal surfaces with different periodicities on the nanometer scale can be obtained by pulsed laser deposition (PLD, 248 nm, pulse duration of 30 ns) of polymer/metal bilayers directly after preparation. Systematically, the thickness dependence of the morphology and topography of the wrinkled metal films was analyzed by electron microscopy (SEM) and atomic force microscope (AFM). The characteristic wave lengths were determined by fourier transformation of the AFM surface patterns. Using the beam theory these wavelengths can be related to the tensile moduli of both film components, and the thicknesses of the polymer and metal film, respectively. The early growth stages were also studied by resistance measurements in order to find the transition from isolated metal clusters to closed layers while increasing the amount of metal. The origin of the stress induced wrinkling induced in the metal layers during PLD, the changes in wavelength and a possible application for the measurement of the elastic moduli of thin films will be discussed.