Self-assembly of Janus disks confined in a slit

Baran, Łukasz; Borówko, M.; Rżysko, W.; Patrykiejew, A.

doi:10.1063/1.5117887

Cited by 7 publications

(21 citation statements)

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“…Another interesting class of systems with strongly orientational interactions consists of colloidal patchy particles [ 34 , 35 , 36 ] A special case of patchy particles, corresponds to Janus particles, in which there are only two regions of different chemical composition and physical properties [ 35 ]. Self-assembly of Janus particles has been studied experimentally [ 34 , 37 , 38 ] and with different theoretical tools [ 39 , 40 ], including computer simulations [ 41 , 42 , 43 ]. Adsorption of Janus particles at the fluid-fluid interface has been theoretically studied by several authors [ 44 , 45 , 46 , 47 , 48 ].…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

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

Patrykiejew

2021

Molecules

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“…We consider spherical Janus particles between two planar surfaces located at a distance of L. Each Janus particle (JP) consists of two hemispheres, A and R, and the A (R) parts are attractive (repulsive). The total pair potential between two Janus particles is expressed as a sum of the hard sphere potential, v JJ hs , and the anisotropic contribution 8,32…”

Section: ■ Methodsmentioning

confidence: 99%

“…The behavior of amphiphilic JPs in two-dimensional slits has been explored using Monte Carlo simulations. 32 Slits with identical walls and Janus-like slits have been considered. The study has shown that interactions between particles, the nature of "walls", and their separation strongly affect the self-assembly.…”

Section: ■ Introductionmentioning

confidence: 99%

“…On the other hand, drying-mediated assembly, sedimentation, and many other significant processes take place at solid surfaces. Therefore, the behavior of JPs near substrates and under confinement has been a subject of numerous studies. ,− The structure formation of amphiphilic molecules at planar walls has been investigated using classical density functional theory . The study focused on the competition between the surface field and the interaction-induced ordering phenomena.…”

Section: Introductionmentioning

confidence: 99%

“…The studies of the assembly of JPs in narrow channels have shown that morphologies that are not observed in the bulk systems can appear under spatial constraints. The first group of works has been devoted to explore the behavior of JPs in various two-dimensional channels. − Sobrino Fernandez et al have carried out molecular dynamic simulations for Janus disks in a two-dimensional plane, which were trapped in a one-dimensional harmonic potential. They found a variety of membrane-like morphologies, consisting of single and multiple chain configurations with different orientations of the particles with respect to each other.…”

Section: Introductionmentioning

confidence: 99%

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Self-Assembly of Amphiphilic Janus Particles Confined between Two Solid Surfaces

2020

Self Cite

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We use Monte Carlo simulations to investigate the behavior of Janus spheres confined between two parallel surfaces. Janus particles are composed of attractive and repulsive parts. The slits with identical and competing walls are considered. In the studied systems, we have found (i) the two-dimensional crystallization of clusters, (ii) the surface-induced formation of “levitating” slabs, and (iii) “inverted” adsorption in Janus-like pores. The mechanism of the formation of particular structures is discussed in detail. Bond orientation analysis is used to identify crystalline phases. We have analyzed the impact of selected parameters on the morphology of the considered systems.

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Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

et al. 2023

Self Cite

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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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Self-assembly of Janus disks confined in a slit

Cited by 7 publications

References 50 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

Self-Assembly of Amphiphilic Janus Particles Confined between Two Solid Surfaces

Amphiphilic Janus Particles Confined in Symmetrical and Janus-Like Slits

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