Sat, 19 Jul 2008 11:15:58 BST CiteULike: weeks's library [348 articles] http://www.citeulike.org/user/weeks/article/1676527 CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/weeks/article/1676527 <i>Physical Review Letters, Vol. 99, No. 2. (2007), pp. 028301-028301.</i><br /><br />Using fast confocal microscopy we image the three-dimensional dynamics of particles in a yielded hard-sphere colloidal glass under steady shear. The structural relaxation, observed in regions with uniform shear, is nearly isotropic but is distinctly different from that of quiescent metastable colloidal fluids. The inverse relaxation time alpha-1" align="middle"> and diffusion constant D, as functions of the local shear rate , show marked shear thinning with alpha-1" align="middle">D0.8 over more than two decades in . In contrast, the global rheology of the system displays Herschel-Bulkley behavior. We discuss the possible role of large scale shear localization and other mechanisms in generating this difference. Three-Dimensional Imaging of Colloidal Glasses under Steady Shear R Besseling Eric Weeks AB Schofield WCK Poon doi:10.1103/PhysRevLett.99.028301 Physical Review Letters, Vol. 99, No. 2. (2007), pp. 028301-028301. 2007-09-19T16:31:56-00:00 2007 Physical Review Letters 99 2 028301 028301 APS dyn-het