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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Poster: Interfaces and Thin Films

CPP 14.29: Poster

Montag, 22. März 2010, 16:30–18:00, Poster C

Mapping sub-surface features in heterogenous polymers — •Eike-Christian Spitzner, Christian Riesch, and Robert Magerle — Chemische Physik, TU Chemnitz, D-09107 Chemnitz

We study tip-sample interaction during scanning force microscopy (SFM) in intermittent contact mode on thin films of polystyrene and polystyrene-block-polybutadiene block copolymer swollen in chloroform vapor as well as semicrystalline polypropylene. We measure pointwise amplitude and phase as function of tip-sample distance (apd curves) and determine conservative and dissipative contributions to the interaction process. In addition we obtain the amount of tip indentation into the polymer film. As a result, maps of apd curves provide depth resolved information about structures at and beneath the surface. The accessible depth is limited by the maximal tip indentation that can reach values up to 30 nm for very soft materials.