dc.creator | Cuetos, Alejandro | es |
dc.creator | Martínez-Haya, Bruno | es |
dc.creator | Lago, S. | es |
dc.creator | Rull Fernández, Luis Felipe | es |
dc.date.accessioned | 2018-02-01T15:47:57Z | |
dc.date.available | 2018-02-01T15:47:57Z | |
dc.date.issued | 2007 | |
dc.identifier.citation | Cuetos, A., Martínez-Haya, B., Lago, S. y Rull Fernández, L.F. (2007). Use of Parsons-Lee and Onsager theories to predict nematic and demixing behavior in binary mixtures of hard rods and hard spheres. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 75 (6), 061701. | |
dc.identifier.issn | 1539-3755 (impreso) | es |
dc.identifier.issn | 1550-2376 (electrónico) | es |
dc.identifier.uri | https://hdl.handle.net/11441/69891 | |
dc.description.abstract | Parsons-Lee and Onsager theories are formulated for the isotropic-nematic transition in a binary mixture of
hard rods and hard spheres. Results for the phase coexistence and for the equation of state in both phases for
mixtures with different relative sizes and composition are presented. The two theories explain correctly the
general behavior observed in experiments and computer simulations for these fluids. In particular, the theory
accounts for the destabilization of the nematic phase when spherical or globular macromolecules are added to
a system of rodlike colloids, and the entrance of the system into a demixed regime at high volume fractions of
the spherical particles. Upon demixing a nematic state rich in rods coexists in equilibrium with an isotropic
state much more diluted in the rodlike component. Onsager theory fails on quantitative grounds for aspect
ratios of the rodlike molecules smaller than 100, and in the cases where the molar fractions of spheres becomes
close to unity. On the contrary, the Parsons-Lee approximation remains accurate down to aspect ratios as small
as 5. The spinodal analysis indicates that the isotropic-isotropic and nematic-nematic coexistences become
feasible for sufficiently large spheres and long rods, respectively. The latter type of coexistence interferes
partially with the isotropic-nematic coexistence regime of interest to the present work. Overall, the study serves
to rationalize and control key aspects of the behavior of these binary nematogenic colloidal systems, which can
be tuned with an appropriate choice of the relative size and molar fractions of the particles. | es |
dc.description.sponsorship | Ministerio de Educación y Ciencia CTQ2004- 07730-C02 VEM2003-20574-C03 | es |
dc.description.sponsorship | Junta de Andalucía PAI FQM-205 FQM-319 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | American Physical Society | es |
dc.relation.ispartof | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 75 (6), 061701. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | Use of Parsons-Lee and Onsager theories to predict nematic and demixing behavior in binary mixtures of hard rods and hard spheres | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.relation.projectID | CTQ2004- 07730-C02 | es |
dc.relation.projectID | VEM2003-20574-C03 | es |
dc.relation.projectID | PAI FQM-205 | es |
dc.relation.projectID | FQM-319 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1103/PhysRevE.75.061701 | es |
dc.identifier.doi | 10.1103/PhysRevE.75.061701 | es |
idus.format.extent | 12 p. | es |
dc.journaltitle | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | es |
dc.publication.volumen | 75 | es |
dc.publication.issue | 6 | es |
dc.publication.initialPage | 061701 | es |
dc.identifier.sisius | 6607445 | es |
dc.contributor.funder | Ministerio de Educación y Ciencia (MEC). España | |
dc.contributor.funder | Junta de Andalucía | |