Ageing and ultra-slow equilibration in concentrated colloidal hard spheres

by: El D Masri, M Pierno, L Berthier, L Cipelletti

Journal of Physics: Condensed Matter, Vol. 17, No. 45. (2005), pp. S3543-S3549.

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Abstract

We study the dynamic behaviour of concentrated colloidal hard spheres using time resolved correlation, a light scattering technique that can detect the slow evolution of the dynamics in out-of-equilibrium systems. Surprisingly, equilibrium is reached a very long time after sample initialization, the non-stationary regime lasting up to three orders of magnitude more than the relaxation time of the system. Before reaching equilibrium, the system displays unusual ageing behaviour. The intermediate scattering function decays faster than exponentially and its relaxation time evolves non-monotonically with sample age.

@article{cipelletti05, abstract = {We study the dynamic behaviour of concentrated colloidal hard spheres using time resolved correlation, a light scattering technique that can detect the slow evolution of the dynamics in out-of-equilibrium systems. Surprisingly, equilibrium is reached a very long time after sample initialization, the non-stationary regime lasting up to three orders of magnitude more than the relaxation time of the system. Before reaching equilibrium, the system displays unusual ageing behaviour. The intermediate scattering function decays faster than exponentially and its relaxation time evolves non-monotonically with sample age.}, author = {Masri, El D. and Pierno, M. and Berthier, L. and Cipelletti, L. }, citeulike-article-id = {2945540}, doi = {10.1088/0953-8984/17/45/046}, journal = {Journal of Physics: Condensed Matter}, keywords = {aging, colloids, trc}, number = {45}, pages = {S3543--S3549}, posted-at = {2008-06-30 18:17:37}, priority = {2}, title = {Ageing and ultra-slow equilibration in concentrated colloidal hard spheres}, url = {http://dx.doi.org/10.1088/0953-8984/17/45/046}, volume = {17}, year = {2005} }

RIS record

TY - JOUR ID - cipelletti05 L3 - citeulike-article-id:2945540 TI - Ageing and ultra-slow equilibration in concentrated colloidal hard spheres JF - Journal of Physics: Condensed Matter VL - 17 IS - 45 SP - S3543 EP - S3549 N2 - We study the dynamic behaviour of concentrated colloidal hard spheres using time resolved correlation, a light scattering technique that can detect the slow evolution of the dynamics in out-of-equilibrium systems. Surprisingly, equilibrium is reached a very long time after sample initialization, the non-stationary regime lasting up to three orders of magnitude more than the relaxation time of the system. Before reaching equilibrium, the system displays unusual ageing behaviour. The intermediate scattering function decays faster than exponentially and its relaxation time evolves non-monotonically with sample age. KW - aging KW - colloids KW - trc AU - Masri, El AU - Pierno, M AU - Berthier, L AU - Cipelletti, L PY - 2005/// UR - http://dx.doi.org/10.1088/0953-8984/17/45/046 ER -

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