Dynamics of Active Colloids (IMAGE) Brown University Caption Computer models show how small, spinning particles suspended in a fluid can form a variety of macro-scale structures at different concentrations. (Concentrations increase left to right.) The vertical axis charts kinetic energy, which declines sharply at high concentrations. Credit Brown University 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.