Regensburg 2013 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 33: Poster II

DY 33.7: Poster

Donnerstag, 14. März 2013, 17:00–19:00, Poster C

Orientational order in confined Janus fluid — •Vinothkumar Mohanakrishnan¹ and Martin Schoen^1,2 — ¹Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Straβe des 17. Juni 135, D-10623 Berlin, Germany — ²Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27695, USA

In this study we report, Monte Carlo simulation of Janus fluid confined to a nanoscopic slit pore with an anchoring function planar to the slit pore, where the walls of the slit pore are structureless and non-conducting. The confined system is simulated in the specialized (N,L_z,P_||,T) isostress-isostrain ensemble. We analyzed the special case of wall separation L_z=8σ in detail where the confined system exhibit spontaneous phase transition from isotropic to polar phase in the pressure range of 1.2 ∼ 1.4. We have computed the density profiles, local dipolar order parameter, in-plane correlation functions at different pressures corresponding to isotropic and polar phases respectively. From the analysis of density profiles, the polar phase is characterized by an additional layer formation (8 layers) as compared to that of the isotropic phase(7 layers). The in-plane correlation function reveals fluid-like behaviour for all the pressure/densities considered. Comparison with the bulk system has been made to study the effect of confinement.