Pattern formation in two-component monolayers of particles with competing interactions

Competing interactions between charged inclusions in membranes of living organisms or charged nanoparticles in near-critical mixtures can lead to self-assembly into various patterns. Motivated by these systems, we developed a simple triangular lattice model for binary mixtures of oppositely charged...

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Autores principales: Ciach, Alina, De Virgiliis, Andrés, Meyra, Ariel Germán, Litniewski, Marek
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Química
Física
Mixture of charged particles
Competing interactions
Self-assembly
Pattern formation
Thermodynamic casimir potential
Molecular modeling
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/154459
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-154459
record_format dspace
spelling I19-R120-10915-1544592023-06-16T20:07:09Z http://sedici.unlp.edu.ar/handle/10915/154459 issn:1420-3049 Pattern formation in two-component monolayers of particles with competing interactions Ciach, Alina De Virgiliis, Andrés Meyra, Ariel Germán Litniewski, Marek 2023 2023-06-16T16:36:20Z en Química Física Mixture of charged particles Competing interactions Self-assembly Pattern formation Thermodynamic casimir potential Molecular modeling Competing interactions between charged inclusions in membranes of living organisms or charged nanoparticles in near-critical mixtures can lead to self-assembly into various patterns. Motivated by these systems, we developed a simple triangular lattice model for binary mixtures of oppositely charged particles with additional short-range attraction or repulsion between like or different particles, respectively. We determined the ground state for the system in contact with a reservoir of the particles for the whole chemical potentials plane, and the structure of self-assembled conglomerates for fixed numbers of particles. Stability of the low-temperature ordered patterns was verified by Monte Carlo simulations. In addition, we performed molecular dynamics simulations for a continuous model with interactions having similar features, but a larger range and lower strength than in the lattice model. Interactions with and without symmetry between different components were assumed. We investigated both the conglomerate formed in the center of a thin slit with repulsive walls, and the structure of a monolayer adsorbed at an attractive substrate. Both models give the same patterns for large chemical potentials or densities. For low densities, more patterns occur in the lattice model. Different phases coexist with dilute gas on the lattice and in the continuum, leading to different patterns in self-assembled conglomerates (‘rafts’). Instituto de Física de Líquidos y Sistemas Biológicos Facultad de Ingeniería Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Física
Mixture of charged particles
Competing interactions
Self-assembly
Pattern formation
Thermodynamic casimir potential
Molecular modeling
spellingShingle Química
Física
Mixture of charged particles
Competing interactions
Self-assembly
Pattern formation
Thermodynamic casimir potential
Molecular modeling
Ciach, Alina
De Virgiliis, Andrés
Meyra, Ariel Germán
Litniewski, Marek
Pattern formation in two-component monolayers of particles with competing interactions
topic_facet Química
Física
Mixture of charged particles
Competing interactions
Self-assembly
Pattern formation
Thermodynamic casimir potential
Molecular modeling
description Competing interactions between charged inclusions in membranes of living organisms or charged nanoparticles in near-critical mixtures can lead to self-assembly into various patterns. Motivated by these systems, we developed a simple triangular lattice model for binary mixtures of oppositely charged particles with additional short-range attraction or repulsion between like or different particles, respectively. We determined the ground state for the system in contact with a reservoir of the particles for the whole chemical potentials plane, and the structure of self-assembled conglomerates for fixed numbers of particles. Stability of the low-temperature ordered patterns was verified by Monte Carlo simulations. In addition, we performed molecular dynamics simulations for a continuous model with interactions having similar features, but a larger range and lower strength than in the lattice model. Interactions with and without symmetry between different components were assumed. We investigated both the conglomerate formed in the center of a thin slit with repulsive walls, and the structure of a monolayer adsorbed at an attractive substrate. Both models give the same patterns for large chemical potentials or densities. For low densities, more patterns occur in the lattice model. Different phases coexist with dilute gas on the lattice and in the continuum, leading to different patterns in self-assembled conglomerates (‘rafts’).
format Articulo
Articulo
author Ciach, Alina
De Virgiliis, Andrés
Meyra, Ariel Germán
Litniewski, Marek
author_facet Ciach, Alina
De Virgiliis, Andrés
Meyra, Ariel Germán
Litniewski, Marek
author_sort Ciach, Alina
title Pattern formation in two-component monolayers of particles with competing interactions
title_short Pattern formation in two-component monolayers of particles with competing interactions
title_full Pattern formation in two-component monolayers of particles with competing interactions
title_fullStr Pattern formation in two-component monolayers of particles with competing interactions
title_full_unstemmed Pattern formation in two-component monolayers of particles with competing interactions
title_sort pattern formation in two-component monolayers of particles with competing interactions
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/154459
work_keys_str_mv AT ciachalina patternformationintwocomponentmonolayersofparticleswithcompetinginteractions
AT devirgiliisandres patternformationintwocomponentmonolayersofparticleswithcompetinginteractions
AT meyraarielgerman patternformationintwocomponentmonolayersofparticleswithcompetinginteractions
AT litniewskimarek patternformationintwocomponentmonolayersofparticleswithcompetinginteractions
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