Dresden 2011 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 38: Poster: Colloids and Complex Liquids

CPP 38.8: Poster

Wednesday, March 16, 2011, 17:00–19:00, P2

Micro-rheology on colloids using Optical Tweezers — •Christof Gutsche, Tim Stangner, Mahdy M. Elmahdy, Olaf Ueberschär, Carolin Wagner, and Friedrich Kremer — Institute of Experimental Physics I, Leipzig University, Linnéstrasse 5, 04103, Leipzig, Germany

Optical tweezers are experimental tools with extraordinary resolution in positioning (+/- 2 nm) a micron-sized colloid and in the measurement of forces (approx. 50 fN) acting on it - without any mechanical contact. This enables one to carry out a multifold of novel experiments. In the following forces within single pairs of colloids in media of varying concentration and valency of the surrounding ionic solution will be presented.