Berlin 2012 – wissenschaftliches Programm
DY 15.4: Vortrag
Mittwoch, 28. März 2012, 10:30–10:45, MA 004
(contribution withdrawn) Pressure fluctuations lead to assembly of smectic domains — •Marco Mazza1 and Martin Schoen1,2 — 1Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany — 2Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, NC 27695, U.S.A.
The interplay of geometry and directional interactions generates myriad different equilibrium phases in liquid crystal materials. However, comparatively little is known of their nonequilibrium behavior, especially in the case of nanoscopic confinement. Here, we perform nonequilibrium computer simulations of a system of prolate mesogens confined to a nanoscopic slit-pore. We apply a time-dependent surface anchoring at the walls. A steady state arises consisting of a smectic domain. We study the behavior of these smectic domains as temperature and frequency are varied.
We find that, although pressure and temperature are too low to form a smectic state, pressure fluctuations in the nonequilibrium steady state match the pressure fluctuations in equilibrium. Our calculations demonstrate in principle a novel method of manufacturing materials with a high degree of molecular order.