Dresden 2011 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DY: Fachverband Dynamik und Statistische Physik

DY 43: Soft Matter

DY 43.3: Vortrag

Freitag, 18. März 2011, 10:45–11:00, ZEU 118

Friction controlled bending solitons as folding pathway toward colloidal clusters — •Nebojsa Casic¹, Steffen Schreiber², Pietro Tierno³, Walter Zimmermann², and Thomas M. Fischer¹ — ¹EP V, Uni Bayreuth, Germany — ²TP 1, Uni Bayreuth, Germany — ³Departament de Química Física, Universitat de Barcelona, Spain

We study the conformational transition of an ensemble of magnetic particles from a linear chain to a compact cluster when subjected to an external magnetic field modulation. We show that the transient dynamics induced by switching the field from static to rotating is governed by the relative friction of adjacent particles in the chain. Solid particles show bending solitons counter-propagating along the chain while buckling of the chain is the mechanism preferred by ferrofluid droplets. By combining real-space experiments with numerical simulations we unveil the underlying mechanism of folding pathways in driven colloidal systems. EPL, 90 (2010) 58001