image: Experimental measurements of spatial distribution of particle fluctuations of a disordered crystal: Particles colored in red identify those particles that show large fluctuations, whereas particles colored in blue or black are those that show smaller fluctuations. The heterogeneity in particle fluctuations is a characteristic of disordered crystals. This image relates to an article that appeared in the Aug. 6, 2010, issue of Science, published by AAAS. The study, by Dr. Deniz Kaya of Carnegie Mellon University in Pittsburgh, Pa, and colleagues is titled, "Normal Modes and Density of States of Disordered Colloidal Solids." view more
Credit: [Image courtesy of Mohammad Islam]