Structure and relaxation dynamics of a colloidal gelE. Del Gado1 and W. Kob2
1 Dipartimento di Scienze Fisiche, Università di Napoli "Federico II" 80125 Napoli, Italy
2 Laboratoire des Colloïdes, Verres et Nanomatériaux, Université Montpellier 2 34095 Montpellier, France
received 6 July 2005; accepted in final form 21 October 2005
published online 25 November 2005
Using molecular dynamics computer simulations, we investigate the structural and dynamical properties of a simple model for a colloidal gel at low volume fraction. We find that at low T the system forms an open percolating cluster, without any sign of phase separation. The nature of the relaxation dynamics strongly depends on the length scale/wave vector considered and can be directly related to the geometrical properties of the spanning cluster.
82.70.Gg - Gels and sols.
82.70.Dd - Colloids.
64.70.Pf - Glass transitions.
© EDP Sciences 2005