Investigation of ring polymers in confined geometries

19th International School on Condensed Matter Physics: Advances in Nanostructured Condensed Matter: Research and Innovations

Usatenko, Zoryana^1 ; Kuterba, Piotr^2 ; Chamati, Hassan^3 ; Halun, Joanna^2

Institute of Physics, Faculty of Physics, Mathematics and Computer Science, Cracow University of Technology, Cracow

30-084, Poland^1

Institute of Physics, Jagiellonian University, Cracow

30-348, Poland^2

Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussée, Sofia

1784, Bulgaria^3

关键词: Colloidal particle;    Confined geometries;    Depletion force;    Derjaguin approximation;    Excluded-volume interactions;    Flexible polymers;    Physical effects;    Space dimensions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/794/1/012002/pdf
DOI  :  10.1088/1742-6596/794/1/012002

来源: IOP

【 摘 要 】

The investigation of a dilute solution of phantom ideal ring polymers and ring polymers with excluded volume interaction (EVI) in a good solvent confined in a slit geometry of two parallel repulsive walls and in a solution of colloidal particles of big size were performed. Taking into account the correspondence between the field theoretical φ4O(n)-vector model in the limit n → 0 and the behavior of long-flexible polymers, the depletion forces and the forces which exert phantom ideal ring and ring polymer with EVI on the walls were obtained in the framework of the massive field theory approach at fixed space dimensions d=3 up to one-loop order. Additionally, the investigation of a dilute solution of phantom ideal ring polymers in the slit geometry of two inert walls and mixed walls with one repulsive and one inert wall were performed. Taking into account the Derjaguin approximation the depletion forces between big colloidal particle and a wall as well as between two big colloidal particles were calculated. The obtained results give possibility to understand the complexity of physical effects arising from confinement and chain topology and can find practical application in new types of micro- and nano-electromechanical devices.