Seminars of the Focus Area Complex Systems

Prof. Dr. C. Beta, Prof. Dr. K. Dethloff, Prof. Dr. R. Engbert, Prof. Dr. M. Holschneider, Prof. Dr. W. Huisinga, Prof. Dr. Ralf Metzler, Prof. Dr. A. Pikovsky, Prof. Dr. S. Reich, Prof. Dr. M. Rosenblum, Prof. Dr. G. Rüdiger, Prof. Dr. T. Scheffer, Prof. Dr. F. Scherbaum, Prof. Dr. J. Selbig, Prof. Dr. F. Spahn


Speaker: Sergey Shklyaev, Department of Chemical Engineering, California Institute of Technology, Pasadena, USA, and Department of Chemical Engineering, University of Puerto Rico-Mayaguez

Title: Osmotic motor: concept and new results

Time: Mon, June 20, 2011, 16:15

Place: bldg 28, room 0.108

An idea to transfer energy of a chemical reaction to a translational motion of the micro or nano particle is very attracting. Drug delivery, construction of microsensors and design of modern materials can be referred as potential applications. Osmotic motor is an example of such a system. This is a catalytic particle moving in a chemically reacting medium. The chemical reaction, which takes place at the motor surface, creates the difference in concentrations of reactant along the motor surface, which in turn results in the difference in the osmotic pressure, pushing the particle.

The simplest model of the osmotic motor is the Janus particle with a chemical reaction taking place at a half of its surface. Near the reactive patch there appears an excess of product of a chemical reaction, whereas near the passive patch the concentration of reactant is higher. This technique was successfully used by several experimental and theoretical groups; a good agreement of the results is found. Another concept is to use nonspherical catalytic particles, when the asymmetry of the concentration of the species emerges due to geometrical properties only.

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Past NLD Seminars (1994-2007) & (2008 ...)

Students' seminar: Theoretical Physics, PIK, Modeling & TSA Berlin-Potsdam-Colloquia: PhysGesellschaft Berlin, TU Berlin, Pro Physik, AIP, AEI, MPI-KGF, GFZ, HMI, PIK, AWI, Max Planck Institute for the History of Science, Mathematik, DPG Disputationen, & Vorschau UP

Udo Schwarz, Zentrum für Dynamik komplexer Systeme,
Universität Potsdam, Campus Golm Karl-Liebknecht-Str. 24, 14476 Potsdam, building 28, room 2.107
Phone: (+49-331) 977-1658, Fax : (+49-331) 977-1045

Email: Udo.Schwarz AT

DFG SFB 1294

DFG Sonderforschungsbereich 1294 Data assimilation

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