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El IQF celebra el Día Internacional de la Mujer con el documental ¿Puedes darme tres nombres? De esta manera, queremos homenajear a todas las valientes mujeres que desde los años treinta del siglo XX trabajaron en el edificio Rockefeller, desafiando los estereotipos de género de su época e inspirando a las nuevas generaciones de científic@s. La Comisión de Igualdad del IQF tiene el compromiso de trabajar y colaborar con todo el personal del centro para eliminar cualquier forma de discriminación que pueda acaecer en el mismo. En fechas tan señaladas, nos gustaría recordar que la igualdad de género es esencial para el enriquecimiento de los grupos de trabajo, el progreso y el desarrollo, no sólo de la investigación, sino de toda la sociedad en su conjunto.

En sus 90 años de historia, la misión de nuestro instituto ha sido realizar una  investigación de excelencia en fisicoquímica fundamental y aplicada, contribuyendo a la formación de varias generaciones de  científicos del máximo nivel. La visión de nuestro instituto es ser una referencia internacional en investigación multidisciplinar enfocada a resolver los retos actuales de nuestra sociedad en ámbitos de salud, biotecnología, nuevos materiales y medioambiente.

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"Dynamics and phase transitions of complex fluids on porous glasses"

Miércoles 9 de abril

Salón de actos, 12:00

 

Dynamics and phase transitions of complex fluids adsorbed on porous glasses

C. Bores1, E.Lomba1, G. Kahl2
 
1 IQFR-CSIC
 2 Insitut für Theoretische Physik and Center for Material Science, TU Wien
 
Complex fluids considered in this work are simple models of colloids or protein solutions which are known to present a rich phase behaviour. These systems are modelled by the short-atractive long-repulsive potential described in [1] which typically gives rise to rich microphase formation.
The structural and dynamical properties of fluids with competing interactions, and the influence of confinement and randomness on their behaviour, have already been studied [2] [4]. These studies have confined the fluids in hard walls, ordered and disordered hard spheres matrices, ... but controlled-pore glasses have never been considered yet.
Porous glasses present important advantages, for instance the pores size can be tuned with the manufacturing parameters. They are produced by demixing a mixture into two phases by means of the spinodal decomposition process, and removing one of the phases that is soluble in acid [5]. In this way, we mimic the manufacturing process of porous glasses using a simple 2D binary mixture of non additive hard spheres, that also exhibits this spinodal separation. Semi-grand canonical Monte Carlo simulations of this NAHS system provide the pore configurations, and Delaunay decomposition and other geometrical analysis [3] allows us to characterize the porous systems previously generated.
Fluids with competing interactions have been simulated by means of grand canonical Monte Carlo programs. Both situations, bulk and adsorbed fluids in porous glasses have been studied by analysing the clustering and correlation functions, in order to know the effect of the confinement on the pattern formation. The dynamics of these systems will also be analysed in the framework of Krakoviack's extension of the mode Coupling Theory to porous fluids[3] [6] and integral equation theory.
The aim of this research is the study of both dynamic, thermodynamic and structural properties of fluids with competing interactions confined in model controlled-pore glasses.

[1] A. Imperio and L. Reatto, Journal of Phys.: Condens. Matter 16, S3769-S3789 (2004)
[2] A. Imperio and L. Reatto,  The Journal of Chem. physics 124, 164712 (2006)
[3] J. Kurzidim and G. Kahl,  Mol. Physics 109, 1331-1342 (2011)
[4] D.F.Schwanzer, G. Kahl,  Cond. Matter Phys. 14, 3, 33801 (2011)
[5] L.D.Gelv, K. E. Gubbins, Langmuir 14, 2097-2111 (1998)
[6]  V. Krakoviack, Phys. Rev. Letters 94, 065703 (2005)

 

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