title: Predicting crystals of Janus colloids.
abstract: We present a numerical study on the phase diagram for a simple model of Janus colloids, including ordered and disordered structures. Using a range of techniques, we generate a set of crystal structures and investigate their relative stability field in the pressure-temperature and temperature-density planes by means of free-energy calculations and thermodynamic integration schemes. We find that despite the Janus colloids' simple architecture, they form stable crystal structures with complicated bond-topologies on an underlying face-centered-cubic or hexagonal-close-packed lattice. In addition, we find a phase consisting of wrinkled bilayer sheets, competing with both the fluid and the crystal phases. We detect a metastable gas-liquid coexistence which displays a micellization-driven re-entrant behavior.
authors: Dipartimento di Fisica, Sapienza Università di Roma, Roma, Italy.
authors: Teun
authors: T
authors: Vissers
authors: Zdenek
authors: Z
authors: Preisler
authors: Frank
authors: F
authors: Smallenburg
authors: Marjolein
authors: M
authors: Dijkstra
authors: Francesco
authors: F
authors: Sciortino
mesh_terms: D003102:Colloids / Q000737:chemistry*; D003460:Crystallization; D011312:Pressure; D011789:Quantum Theory; D013696:Temperature
chemical_list: D003102:Colloids