Silica superballs with m = 3.9 are dispersed with pNIPAM depletants and equilibrated at room temperature, where they form square crystallites. As the temperature is increased to 28.5 °C, the crystallites melt. Upon decreasing the temperature back to room temperature, the particles begin to reassemble.
Laura Rossi, Vishal Soni, Douglas J. Ashton, David J. Pine, Albert P. Philipse, Paul M. Chaikin, Marjolein Dijkstra, Stefano Sacanna, and William T. M. Irvine
PNAS. 2015. 112:5286-5290 DOI: 10.1073/pnas.1415467112