Séminaire de groupe
|Disorder effects on the shapes of linear and star branched polymers|
|jeudi 25 octobre 2012 , 10h25|
|Salle de séminaire du groupe de Physique Statistique|
Flexible polymer macromolecules in dilute solutions form crumpled coils with a global shape, which greatly differs from spherical symmetry and is surprisingly anisotropic, as it has been found experimentally and confirmed in many analytical and numerical investigations. In this talk, I will discuss, how the shape can be quantified within universal characteristics and how to calculate these characteristics analytically. Using the field theoretical renormalization group approach the effect of structural disorder in the environment on the universal properties of chain and star polymer macromolecules will be analyzed. The talk is based on recent work performed in collaboration with V. Blavatska and C. von Ferber: Phys. Lett. A 374 (2010) 2861; Condens. Matter Phys. 14 (2011) 33701; ibid. 15 (2012) to appear (arXiv:1207.2881).