8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

P5.60Wed 711:10-14:00Simple models for simulation of patchy colloidsNoe G. Almarza 11 CSIC, Instituto de Quimica-Fisica Rocasolano, C/Serrano 119 E-28019, Madrid,SpainIn this contribution, we will analyze the ability of very simple models to capture the essentialfeatures of the phase diagrams of patchy colloids. In order to do this we have carried out MonteCarlo simulations on several lattice gas models that mimic a number of interesting problems ofself-assembling patchy colloids: We will show how a relatively simple model defined on a three dimensionallattice reproduces the topology of the phase diagram of anisotropic particles with tetrahedralsymmetry [1]. We will present results for the order-disorder transition of self-assemblingrigid rods on two-dimensional lattices [2, 3] In addition, we will show preliminary results [4] fora self-assembling model on a lattice whose liquid branch of the liquid-vapor equilibrium exhibits”empty” liquid behavior: At low temperature, the density of the liquid phase reduces with the temperatureas in the results recently reported by Russo et al. [5] on a patchy model on the continuum.newline[1] Almarza, and E. G. Noya, Mol. Phys. 109, 65 (2011).[2] N. G. Almarza, J. M. Tavares, and M. M. Telo da Gama, Phys. Rev. E 82, 061117 (2010).[3] N. G. Almarza, J. M. Tavares, and M. M. Telo da Gama, J. Chem. Phys. 134, 071101 (2011).[4] N. G. Almarza et. al, (To be published).[5] J. Russo, J. M. Tavares, P. I. C. Teixeira, M. M. Telo da Gama, and F. Sciortino, Phys. Rev.Lett. 106, 085703 (2011).60