Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2227
Título: Phase diagrams of binary mixtures of patchy colloids with distinct numbers and types of patches: Theempty fluid regime
Autor: de las Heras, Daniel
Tavares, José Maria
da Gama, Margarida M. Telo
Palavras-chave: Directional Attractive Forces
Equilibria
Particles
Crystals
Spheres
Sites
Data: 14-Mar-2011
Editora: Amer Inst Physics
Citação: DE LAS HERAS, Daniel; TAVARES, José Maria; DA GAMA, Margarida M. Telo - Phase diagrams of binary mixtures of patchy colloids with distinct numbers and types of patches: Theempty fluid regime. Journal of Chemical Physics. ISSN 0021-9606. Vol. 134, n.º 10 (2011).
Relatório da Série N.º: ;104904
Resumo: We investigate the effect of distinct bonding energies on the onset of criticality of low functionality fluid mixtures. We focus on mixtures ofparticles with two and three patches as this includes the mixture where "empty" fluids were originally reported. In addition to the number of patches, thespecies differ in the type of patches or bonding sites. For simplicity, we consider that the patches on each species are identical: one species has threepatches of type A and the other has two patches of type B. We have found a rich phase behavior with closed miscibility gaps, liquid-liquid demixing, and negative azeotropes. Liquid-liquid demixing was found to pre-empt the "empty" fluid regime, of these mixtures, when the AB bonds are weaker than the AA or BB bonds. By contrast, mixtures in this class exhibit "empty" fluid behavior when the AB bonds are stronger than at least one of the other two. Mixtureswith bonding energies epsilon(BB) = epsilon(AB) and epsilon(AA) < epsilon(BB), were found to exhibit an unusual negative azeotrope. (C) 2011 American Institute of Physics. [doi:10.1063/1.3561396]
Peer review: yes
URI: http://hdl.handle.net/10400.21/2227
ISSN: 0021-9606
Aparece nas colecções:ISEL - Física - Artigos



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