Two-dimensional Janus-like particles on a triangular lattice

Patrykiejew, A.; Rżysko, W.

doi:10.1039/d0sm00656d

Cited by 7 publications

(18 citation statements)

References 36 publications

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“…Thus, all inter-reactions are non-repulsive, but, in general, the BB attraction has been assumed to weaker than the AA attraction. This choice of parameters seems quite well suited to represent Janus-like particles [ 50 , 51 , 52 ].…”

Section: The Modelmentioning

confidence: 99%

Lattice Model of Multilayer Adsorption of Particles with Orientation Dependent Interactions at Solid Surfaces

Patrykiejew

2021

Molecules

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A simple lattice model has been used to study the formation of multilayer films by fluids with orientation-dependent interactions on solid surfaces. The particles, composed of two halves (A and B) were allowed to take on one of six different orientations. The interaction between a pair of differently oriented neighboring particles was assumed to depend on the degrees to which their A and B parts overlap. Here, we have assumed that the AA interaction was strongly attractive, the AB interaction was set to zero, while the BB interaction was varied between 0 and −1.0. The ground state properties of the model have been determined for the systems being in contact with non-selective and selective walls over the entire range of BB interaction energies between 0 and −1.0. It has been demonstrated that the structure of multilayer films depends on the strengths of surface potential felt by differently oriented particles and the interaction between the B halves of fluid particles. Finite temperature behavior has been studied by Monte Carlo simulation methods. It has been shown that the bulk phase phase diagram is qualitatively independent of the BB interaction energy, and has the swan neck shape, since the high stability of the dense ordered phase suppresses the possibility of the formation of disordered liquid-like phase. Only one class of non-uniform systems with the BB interaction set to zero has been considered. The results have been found to be consistent with the predictions stemming form the ground state considerations. In particular, we have found that a complete wetting occurs at any temperature, down to zero. Furthermore, the sequences of layering transitions, and the structure of multilayer films, have been found to be the same as observed in the ground state.

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Section: The Modelmentioning

confidence: 99%

Lattice Model of Multilayer Adsorption of Particles with Orientation Dependent Interactions at Solid Surfaces

Patrykiejew

2021

Molecules

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“…The behavior of dense two-dimensional systems of Janus particles has been recently studied by several authors [ 3 , 12 , 13 , 14 ]. Shin and Schweizer [ 3 ] used the Kern–Frenkel model [ 15 ] and developed a version of self-consistent phonon theory, which predicted the formation of different orientationally ordered hexagonal phases.…”

Section: Introductionmentioning

confidence: 99%

“…We also studied the phase behavior of Janus-like particles [ 14 ] using the same lattice model with

, i.e., with the interaction potential similar to that proposed by Kern and Frenkel [ 15 ]. The model was studied using the Monte Carlo method in the grand canonical ensemble, and two versions of the model were considered.…”

Section: Introductionmentioning

confidence: 99%

“…To this end, we applied the same lattice gas model as used in [ 13 , 14 , 20 ] and assumed that the interaction between the neighboring Janus particles depends on the degrees to which their different parts overlap. We considered three series of systems in which the A-A interaction was fixed while A-B and B-B interactions were varied.…”

Section: Introductionmentioning

confidence: 99%

“…Only the second series, with

, appeared to mimic real Janus particles with hydrophilic and hydrophobic parts [ 2 , 3 , 14 ]. However, the other two series are also of interest, since each of them has demonstrated a little different phase behavior.…”

Section: Introductionmentioning

confidence: 99%

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Phase Transitions in Two-Dimensional Systems of Janus-like Particles on a Triangular Lattice

Patrykiejew

2021

IJMS

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We studied the phase behavior of two-dimensional systems of Janus-like particles on a triangular lattice using Monte Carlo methods. The model assumes that each particle can take on one of the six orientations with respect to the lattice, and the interactions between neighboring particles were weighted depending on the degree to which their A and B halves overlap. In this work, we assumed that the AA interaction was fixed and attractive, while the AB and BB interactions varied.We demonstrated that the phase behavior of the systems considered strongly depended on the magnitude of the interaction energies between the AB and BB halves. Here, we considered systems with non-repulsive interactions only and determined phase diagrams for several systems. We demonstrated that the phase diagram topology depends on the temperature at which the close-packed systems undergo the orientational order–disorder transition.

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Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

et al. 2023

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We use Monte Carlo simulations to investigate the behavior of Janus spheres composed of attractive and repulsive parts confined between two parallel solid surfaces. The slits with identical and competing walls are studied. The adsorption isotherms of Janus particles are determined, and the impact of the density in the pore on the morphology is discussed in detail. So far, this issue has not been systematically investigated. New, unique structures are observed along the isotherms, including the bilayer and three-layer structures located at different distances from the walls. We analyze how selected parameters affect the positional and orientational ordering in these layers. In some cases, the particles form highly ordered hexagonal lattices.

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Two-dimensional Janus-like particles on a triangular lattice

Abstract:
We have studied the phase behavior of a two-dimensional system of Janus-like particles on a triangular lattice using the Monte Carlo method in a grand canonical ensemble.

Cited by 7 publications

References 36 publications

Lattice Model of Multilayer Adsorption of Particles with Orientation Dependent Interactions at Solid Surfaces

Lattice Model of Multilayer Adsorption of Particles with Orientation Dependent Interactions at Solid Surfaces

Phase Transitions in Two-Dimensional Systems of Janus-like Particles on a Triangular Lattice

Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

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Two-dimensional Janus-like particles on a triangular lattice

Abstract: We have studied the phase behavior of a two-dimensional system of Janus-like particles on a triangular lattice using the Monte Carlo method in a grand canonical ensemble.

Cited by 7 publications

References 36 publications

Lattice Model of Multilayer Adsorption of Particles with Orientation Dependent Interactions at Solid Surfaces

Lattice Model of Multilayer Adsorption of Particles with Orientation Dependent Interactions at Solid Surfaces

Phase Transitions in Two-Dimensional Systems of Janus-like Particles on a Triangular Lattice

Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

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Abstract:
We have studied the phase behavior of a two-dimensional system of Janus-like particles on a triangular lattice using the Monte Carlo method in a grand canonical ensemble.