Aging of the Nonlinear Optical Susceptibility of colloidal solutions

Abstract

Using Z-scan and dynamic light scattering measurements we investigate the nonlinear optics response of a colloidal solution undergoing dynamics slowing down with age. We study the high optical nonlinearity of an organic dye (Rhodamine B) dispersed in a water-clay (Laponite) solution, at different clay concentrations (2.0 wt% - 2.6 wt%), experiencing the gelation process. We determine the clay platelets self diffusion coefficient and, by its comparison with the structural relaxation time, we conclude that the gelation process proceeds through the structuring of interconnecting clay platelets network rather than through clusters growth and aggregation.

arXiv comment4 figures, 4 pages

References in corpus (6)

• Analytical Solution of the Off-Equilibrium Dynamics of a Long Range Spin-Glass Model
• On the Out of Equilibrium Relaxation of the Sherrington - Kirkpatrick model
• Routes to gelation in a clay suspension
• Optical spatial solitons in soft-matter: mode coupling theory approach
• Off-Equilibrium Effective Temperature in Monatomic Lennard-Jones Glass
• Aging after shear rejuvenation in a soft glassy colloidal suspension: evidence for two different regimes