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Lecture Alexei R. Khokhlov

Roster

WhenWhere
09 February 2006 FWN-Building 5111.0080, Nijenborgh 4, 9747 AG, Groningen
Speaker:Prof. Dr. Alexei R. Khokhlov
Affiliation:Physics Department, Moscow State University, Russia
Title:Self-organisation and catalysis in solution of amphiphilic polymers. Surface nanoreactors.
Date:Thu Feb 9, 2006
Start:14.00
Location:FWN-Building 5111.0080
Host:G. ten Brinke
Telephone:+31 50 363 4509

Abstract

The chemical structure of the majority of monomer units of water-soluble polymers involves both polar and non-polar atomic groups, i. these monomer units are amphiphilic. This fully applies also to monomer units of biopolymers (DNA, RNA, proteins, polysaccharides). amphiphilic nature means surface activity with respect to the oil-water boundaries, as well as to the boundaries of polymer globules with hydrophobic core. This fact leads to significant changes in the properties of polymeric globules containing amphiphilic monomer units. In particular, non-spherical globular shapes are favored, and globular solution becomes highly stable with respect to the aggregation. Other aspect of this problem is connected with relatively small fraction of volume occupied in the system by surface layers of nanometer width (in oil/water emulsions or in globular solution). In this case, when the surface activity of components (monomer units or low-molecular ligands) is high, the surface layers can play the role of surface catalytic nanoreactors, where reaction-active groups are concentrated and specifically oriented with respect to each other.
Last modified:22 October 2012 2.30 p.m.