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Résumé:

Using molecular dynamics computer simulations we investigate the structuraland dynamical properties of a simple model for a colloidal gel at low volumefraction. We find that at low T the system is forming an open percolatingcluster, without any sign of a phase separation. The nature of the relaxationdynamics depends strongly on the length scale/wave-vector considered and can bedirectly related to the geometrical properties of the spanning cluster.

Commentaires: 7 pages of EPL-tex; 4 figures, revised version