video: Particles swap positions but the crystalline lattice is preserved before the liquid nucleus form. The coalescence of two subcritical nuclei results a post-critical nucleus (speed is 9x real time). This video relates to a paper that appeared in the Oct. 5, 2012, issue of Science, published by AAAS. The paper, by Ziren Wang at Hong Kong University of Science and Technology in Hong Kong, China, and colleagues was titled, "Imaging the Homogeneous Nucleation During the Melting of Superheated Colloidal Crystals." view more
Credit: Video courtesy of Ziren Wang