Shear melting of a colloidal glass Export

@article{Eisenmann09, abstract = {We explore the microscopic nature of shear melting of colloidal glasses using confocal microscopy.We find that shear melting, which occurs at strains of ∼ 8\%, coincides with a strongly non-Gaussian step size distribution, reflecting cooperative motions of ∼ 3 particles. For large strainsthe particle mean square displacement increases linearly with strain and the step size distribution isGaussian; the applied shear thus drives diffusive behavior. The effective diffusion coefficient variesapproximately linearly with shear rate, consistent with a modified Stokes-Einstein relationship inwhich thermal energy is replaced by shear energy and the length-scale is set by the size of thecooperative regions.}, author = {Eisenmann, Christoph and Kim, Chanjoong and Mattsson, Johan and Weitz, David A.}, citeulike-article-id = {5538714}, journal = {unpublished}, keywords = {colloids, glass, shear}, posted-at = {2009-08-21 17:18:06}, priority = {4}, title = {Shear melting of a colloidal glass}, year = {2009} }

TY - JOUR ID - Eisenmann09 L3 - citeulike-article-id:5538714 N2 - We explore the microscopic nature of shear melting of colloidal glasses using confocal microscopy.We find that shear melting, which occurs at strains of ∼ 8%, coincides with a strongly non-Gaussian step size distribution, reflecting cooperative motions of ∼ 3 particles. For large strainsthe particle mean square displacement increases linearly with strain and the step size distribution isGaussian; the applied shear thus drives diffusive behavior. The effective diffusion coefficient variesapproximately linearly with shear rate, consistent with a modified Stokes-Einstein relationship inwhich thermal energy is replaced by shear energy and the length-scale is set by the size of thecooperative regions. JF - unpublished TI - Shear melting of a colloidal glass KW - colloids KW - glass KW - shear AU - Eisenmann, Christoph AU - Kim, Chanjoong AU - Mattsson, Johan AU - Weitz, David PY - 2009/// ER -