Equilibration and Aging of Liquids of Non-Spherically Interacting Particles
| Autor: | L. F. Elizondo-Aguilera, Magdaleno Medina-Noyola, Ernesto C. Cortés-Morales |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Physics
Isotropy Thermal fluctuations Thermodynamics Non-equilibrium thermodynamics Spherical harmonics 02 engineering and technology Covariance 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films symbols.namesake Fourier transform Correlation function 0103 physical sciences Materials Chemistry symbols Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Structure factor |
| Zdroj: | The Journal of Physical Chemistry B. 120:7975-7987 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/acs.jpcb.6b04635 |
| Popis: | The nonequilibrium self-consistent generalized Langevin equation theory of irreversible processes in liquids is extended to describe the positional and orientational thermal fluctuations of the instantaneous local concentration profile n(r,Ω,t) of a suddenly quenched colloidal liquid of particles interacting through nonspherically symmetric pairwise interactions, whose mean value n(r,Ω,t) is constrained to remain uniform and isotropic, n (r,Ω, t) = n (t). Such self-consistent theory is cast in terms of the time-evolution equation of the covariance [Formula: see text] of the fluctuations [Formula: see text] of the spherical harmonics projections nlm(k;t) of the Fourier transform of n(r,Ω,t). The resulting theory describes the nonequilibrium evolution after a sudden temperature quench of both, the static structure factor projections Slm(k,t) and the two-time correlation function [Formula: see text], where τ is the correlation delay time and t is the evolution or waiting time after the quench. As a concrete and illustrative application we use the resulting self-consistent equations to describe the irreversible processes of equilibration or aging of the orientational degrees of freedom of a system of strongly interacting classical dipoles with quenched positional disorder. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|