Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 14: Polymer physics at the surface

CPP 14.1: Vortrag

Montag, 7. März 2005, 16:30–16:45, TU C130

Experiments with single molecules of polyelectrolytes at surfaces. — •Anton Kiriy, Ganna Gorodyska, Vera Bocharova, and Manfred Stamm — Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden

Single molecules of linear polyelectrolytes (such as poly(2-vinylpyridine or polystyrene sulfonic acid) and star-shaped block copolymers (polystyrene-poly(2-vinylpyridine) were imaged being deposited onto an atomically flat mica with the aid of atomic force microscopy. Their diverse conformational transitions were investigated (Kiriy, A. et al., JACS 2002, 13454). We also have developed the simple contrasting procedure to improve the AFM visualization of positively charged polyelectrolytes deposited on the substrates of relatively high roughness via counter ion exchange between Cl- anions and bulky hexacyanoferrate anions or negatively charged nanoclusters of Prussian Blue virtually without altering of the initial polymer conformation (Kiriy, A. et al., JACS 2003, 11202).