Sedimentation of a suspension of rods: Monte Carlo simulation of a continuous two-dimensional problem

Abstract

The sedimentation of a two dimensional suspension containing rods was studied by means of Monte Carlo (MC) simulations. An off-lattice model with continuous positional and orientational degrees of freedom was considered. The initial state before sedimentation was produced using a model of random sequential adsorption. During such sedimentation, the rods undergo translational and rotational Brownian motions. The MC simulations were run at different initial number densities (the numbers of rods per unit area), ρi, and sedimentation rates, u. For sediment films, the spatial distributions of the rods, the order parameters and the electrical conductivities were examined. Different types of sedimentation-driven self-assembly and anisotropy of the electrical conductivity were revealed inside the sediment films. This anisotropy can be finely regulated by changes in the values of ρi and u.

Dynamic Monte Carlo simulations of inhomogeneous colloidal suspensions

“…Despite the increasing use of the DMC method to investigate the dynamics of complex fluids, including liquid crystals [18][19][20][21], most of the attention has been devoted to develop and test the DMC technique in homogeneous, single-phase colloids. However, due to the fundamental and practical relevance of understanding the dynamics close and across an interface, a theoretical formulation of DMC for systems where phase coexistence is observed needs to be explored.…”

Особливості Утворення Сітки В Гелях Жорстколанцюгових Полімерів

“…Note that the presented deposition model is rather approximate, because it does not consider, for example, the translational and rotational Brownian motions of globule-rods [36], as well as their interaction, which undoubtedly affects the roughness of the surface formed during the polymer film epitaxy. The corresponding problem is rather complicated and goes beyond the scope of this work.…”

Особливості гелеутворення і агрегації у водних розчинах гідроксипропілцелюлози з солями NaCl, NaI і AgNO3

“…In our opinion, the aggregation and sedimentation of polymer clusters from dilute solutions in the presence of ions has an important application value for the development of promising technologies, such as catalysts with adjustable activity and film nanocomposite materials [36][37][38][39][40]. In works [13][14][15][16][17], it was shown that composite films based on water-soluble cellulose derivatives with metallic silver nanoparticles have a high fungicidal and antibacterial efficiencies against both gram-positive and gram-negative bacteria.…”