The Smallest Particle of Ice (IMAGE) University College London Caption The "smallest particle of ice" -- a water hexamer as seen by STM (about 1 nanometer wide, left) and quantum mechanics (right). Credit London Centre for Nanotechnology, 2007 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.