Shape Driven Solid--Solid Transitions in Colloids
  Despite the fundamental importance of solid--solid transitions for metallurgy, ceramics, earth science, reconfigurable materials, and colloidal matter, the details of how materials transform between two solid structures are poorly understood. We introduce a class of {simple} model systems in which the direct control of local order, via colloid shape change, induces solid--solid phase transitions, and characterize how the transitions happen thermodynamically. We find that within a single shape family there are solid--solid transitions that can occur with or without a thermal activation barrier. Our results provide new means for the study of solid--solid phase transitions, and have implications for designing reconfigurable materials. 
Chrisy Xiyu Du, Greg van Anders, Richmond S. Newman, Sharon C. Glotzer
cond-mat.soft cond-mat.mes-hall cond-mat.mtrl-sci