Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Complex Fluids and Colloids, Micelles and Vesicles (joint session CPP/DY)

CPP 30.9: Vortrag

Mittwoch, 3. April 2019, 12:00–12:15, H14

Ring polymers in confined geometries with mixed boundary conditions — •Zoryana Usatenko1, Piotr Kuterba2, and Joanna Halun31Institute of Physics, Cracow University of Technology, Cracow 30-084, Poland — 2Jagiellonian University, Cracow 30-348, Poland — 3Institute of Nuclear Physics PAN, Cracow 31-342, Poland

Investigation of a dilute solution of phantom ideal ring polymers and ring polymers with excluded volume interactions in a good solvent confined in a slit geometry of two parallel walls with mixed boundary conditions which corresponds to the case of one repulsive and the other one inert wall is performed. Besides, taking into account the Derjaguin approximation the investigation of a dilute solution of ring polymers confined in a solution of mesoscopic colloidal particles of big size with different radii and different adsorbing or repelling properties in respect for polymers is performed. The calculation of the dimensionless depletion interaction potentials, the depletion forces and the monomer density profiles were performed in the framework of the massive field theory approach at fixed space dimension d<4 up to one loop order. The density-force relation in the case of phantom ideal ring polymer chains is analyzed and the respective universal amplitude ratio is calculated. The obtained results indicate the interesting and nontrivial behaviour of ring polymers in confined geometries and give possibility better to understand the complexity of physical effects arising from confinement and chain topology, especially in the case of interaction of λ bacteriophages with E.coli bacteria cells.

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