Topological lifetimes of polydisperse colloidal hard spheres at a wall Export

@article{citeulike:5693149, abstract = {Confocal scanning laser microscopy was used to study the behavior of dense suspensions of model colloidal hard spheres at a single wall. Due to the slight polydispersity; our system shows a reentrant melting transition at high densities involving a hexatic structure [R. P. A. Dullens and W. K. Kegel; Phys. Rev. Lett 92 ; 195702 (2004)]. The reentrant melting transition is accompanied by an increase in the mean-squared displacement. The correlation between structure and dynamics was quantitatively analyzed on a single-particle level. In particular; the topological lifetime; being the average time that a particle spends having the same coordination number; is determined for all coordination numbers and as a function of volume fraction. The defective (non-sixfold-coordinated) particles exhibit shorter lifetimes than sixfold-coordinated particles; indicating that the mobility of the system is larger at or close to defective particles. The lifetime itself is a strong function of volume fraction. In particular; the global behavior of the mean-squared displacement is proportional to the hopping frequency (the inverse of the lifetime); showing that particles changing their coordination number contribute most to the local mobility.}, author = {Dullens, Roel P. A. and Kegel, Willem K.}, citeulike-article-id = {5693149}, citeulike-linkout-0 = {http://dx.doi.org/10.1103/PhysRevE.71.011405}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRE/v71/i1/e011405}, citeulike-linkout-2 = {http://link.aps.org/pdf/PRE/v71/i1/e011405}, doi = {10.1103/PhysRevE.71.011405}, journal = {Physical Review E}, keywords = {boundary, colloids, confocal, dyn-het, polydisperse}, month = {Jan}, number = {1}, pages = {011405}, posted-at = {2009-08-31 20:17:35}, priority = {2}, publisher = {American Physical Society}, title = {Topological lifetimes of polydisperse colloidal hard spheres at a wall}, url = {http://dx.doi.org/10.1103/PhysRevE.71.011405}, volume = {71}, year = {2005} }

TY - JOUR ID - citeulike:5693149 L3 - citeulike-article-id:5693149 N2 - Confocal scanning laser microscopy was used to study the behavior of dense suspensions of model colloidal hard spheres at a single wall. Due to the slight polydispersity; our system shows a reentrant melting transition at high densities involving a hexatic structure [R. P. A. Dullens and W. K. Kegel; Phys. Rev. Lett 92 ; 195702 (2004)]. The reentrant melting transition is accompanied by an increase in the mean-squared displacement. The correlation between structure and dynamics was quantitatively analyzed on a single-particle level. In particular; the topological lifetime; being the average time that a particle spends having the same coordination number; is determined for all coordination numbers and as a function of volume fraction. The defective (non-sixfold-coordinated) particles exhibit shorter lifetimes than sixfold-coordinated particles; indicating that the mobility of the system is larger at or close to defective particles. The lifetime itself is a strong function of volume fraction. In particular; the global behavior of the mean-squared displacement is proportional to the hopping frequency (the inverse of the lifetime); showing that particles changing their coordination number contribute most to the local mobility. IS - 1 JF - Physical Review E EP - 011405 TI - Topological lifetimes of polydisperse colloidal hard spheres at a wall PB - American Physical Society VL - 71 SP - 011405 KW - boundary KW - colloids KW - confocal KW - dyn-het KW - polydisperse AU - Dullens, Roel AU - Kegel, Willem PY - 2005/Jan// UR - http://dx.doi.org/10.1103/PhysRevE.71.011405 ER -