Navigation and service


Special ICS Seminar:
Cooling a liquid: first-principles statistical thermodynamic theory of amorphous solids (glasses, gels, sponge-like glasses, ...)

Prof. Dr. Magdaleno Medina Noyola

Instituto de Física "Manuel Sandoval Vallarta" Universidad Autónoma de San Luis Potosí and

División de Ciencias e Ingenierías, Universidad de Guanajuato, Campus León.

begin
22 Sep 2016 10:30
end
22 Sep 2016 11:30
venue
Seminarraum A1-3, Building 04.6, Entrance E1

Abstract:
The amorphous solidification of glass- and gel-forming liquids is an ubiquitous non-equilibrium process of enormous fundamental and practical relevance. In contrast with equilibrium crystalline solids, whose properties have no history dependence, non-equilibrium amorphous solids may exhibit aging and their properties do depend on their preparation protocol [1]. Predicting the main universal signatures of these phenomena, as well as their specific features reflecting the
particular molecular interactions, is a long-standing statistical physics challenge. The recently-proposed non-equilibrium self-consistent generalized Langevin equation (NE-SCGLE) theory of irreversible processes in liquids [2], however, was recently shown to provide a simple and intuitive first-principles description [3] of the non-stationary and non-equilibrium structural relaxation of model liquids with purely repulsive interparticle interactions near their high-density transition to repulsive, hard-sphere-like glasses. In this work we explain how the same non-equilibrium theory also predicts for model liquids with repulsive plus attractive interactions a far richer and more complex scenario, which includes the formation of sponge-like gels and porous glasses at low densities and temperatures by arrested spinodal decomposition [4]. We also discuss the possibility of formation of disordered non-equilibrium solids involving fibers and bundles when non-radially symmetric interactions are present [5].

[1] Angell C.A., Ngai K.L., McKenna G.B., McMillan P.F. and Martin S.F.,J. Appl. Phys. 88, 3113 (2000).
[2] P.E. Ramirez-Gonzalez and M. Medina-Noyola, Phys. Rev. E 82, 061503 (2010).
[3] L.E.Sanchez-Daz, P.E. Ramirez-Gonzalez, and M. Medina-Noyola, Phys. Rev. E 87, 052306 (2013).
[4] J.M. Olais-Govea, L. Lopez-Flores, and M. Medina-Noyola, J. Chem Phys. 143, 174505 (2015).
[5] E.C. Cortés-Morales, L.F. Elizondo-Aguilera, and M. Medina-Noyola, J. Phys. Chem B 120, 7975 (2016).

Contact

Prof. Dr. Gerhard Naegele
Phone: +49 2461 61-2504
Fax: +49 2461 61-2280
email: g.naegele@fz-juelich.de

Servicemeu

Homepage