Re-entrant ordering of solute in a colloidal suspension during solvent   evaporation
  We study the phenomenon of self-assembly of silica micro-spheres on a glass plate during evaporation of the solvent from a colloidal suspension. Our experiments unveil an interesting competition between ordering and compaction in a strongly driven, out of equilibrium system arising from a slowing down of dynamics due to an impending glass transition. A suitable choice of experimental conditions minimizing the influence of many other competing phenomena that usually complicate probing of this underlying physics is crucial for our study. A re-entrant behavior in the order-disorder phase diagram as a function of particle density and drying time is established and the results are explained with the help of simulations and phenomenological theory. 
Sumanta Mukherjee, Arnab Saha, Pralay K. Santra, Surajit Sengupta, D.   D. Sarma
cond-mat.soft