Colloidal Crystals (1 of 2) (IMAGE) Georgia Institute of Technology Caption Vials containing microgel particles await analysis in the laboratory of Alberto Fernandez-Nieves at Georgia Tech. Researchers now believe they understand why oversized microgel particles spontaneously shrink to allow formation of colloidal crystals in assemblies of smaller microparticles. Credit Credit: John Toon, Georgia Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.