Demixing and field-induced population inversion in a mixture of neutral and dipolar-hard spheres confined in a slit pore

作者：Brunet C; Malherbe J G; Amokrane S^*

来源：Molecular Physics, 2012, 110(11-12): 1161-1169.

DOI：10.1080/00268976.2012.660205

• confined fluids
• colloids
• field effects
• simulation
• phase diagram

We study the influence of an external field on demixing and its interplay with the field-induced population inversion for a binary mixture of neutral and dipolar non-additive hard-spheres confined in a slit pore. Demixing lines are determined by Gibbs Ensemble Monte Carlo simulations and population inversion paths by grandcanonical/canonical simulations of the pore/bulk equilibrium. Besides the demixing line in the bulk, results are given for two different pore widths and in parallel and normal fields. Similar to the effect of geometrical confinement, a normal field is found to favour the mixed state so that the population inversion does not interfere with demixing. A parallel field leads to more complex scenarios.

• 出版日期2012