Colloidal Gel PercolationDepletion Attraction · Network Formation · Cluster Statistics

Colloidal gels form when short-range depletion attraction (from polymer coils) overcomes Brownian motion. At sufficient φ and attraction strength, a system-spanning network (gel) forms — percolation transition.

Bonds form with prob ∝ exp(u/kT) when particles are within δ. Colors show cluster membership.