Structural behavior of a two length scale core-softened fluid in two dimensions

Cardoso, Daniel Souza; Hernandes, Vinícius Fonseca; Nogueira, T.P.O.; Bordin, José Rafael

doi:10.1016/j.physa.2020.125628

Cited by 16 publications

(31 citation statements)

References 68 publications

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“…al [85]. Later, Cardoso and co-workers [62] found a third region of structural anomaly at higher densities. They show that each anomalous behavior can be associated to reentrant fluid phases that separates two solid crystalline regions, and to distinct aggregates size in the fluid phase.…”

Section: Of 12mentioning

confidence: 89%

“…For confined systems and considering the particles near to the walls (contact layers), besides the anomalous region due the competition between scales, another one rises induced by nanoconfinement at low densities [83]. More recent works [62,84] showed that dimensionality leads to extra structural anomalies at higher densities and low temperatures.…”

Section: Methods and Simulation Detailsmentioning

confidence: 99%

“…Additionally, structure of colloidal systems has been extensively studied by molecular dynamics and Monte Carlo simulations and the presence of patterns have been found for 3D bulk [42], 2D bulk [60][61][62] and confined systems [52,[63][64][65][66][67][68][69][70][71]. Significant differences are reported when going from a 2D to a quasi-2D system.…”

Section: Of 12mentioning

confidence: 99%

“…But where is the boundary between the 3D behavior, with one region of structural anomaly in the fluid phase associated to a crystalline-amorphous solid transition [75,86] and the 2D behavior, where up to three anomalous structural regions was found [49,62]? To unveil this location, we expand our previous works [64,82,83] to see what happens in the quasi-2D limit with the CS model confined between two flat, highly repulsive solvophobic walls.…”

Section: Of 12mentioning

confidence: 99%

See 3 more Smart Citations

How Dimensionality Affects the Structural Anomaly in a Core-Softened Collo

Krott¹,

Bordin²

2023

Preprint

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The interaction between hard-core soft-shell colloids are characterized by having two characteristic distances: one associated with the penetrable, soft corona and another one corresponding to the impenetrable core. Isotropic core-softened potentials with two characteristic length scales have long been applied to understand the properties of such colloids. Those potentials usually show waterlike anomalies, and recent findings have indicated the existence of multiple anomalous regions in the 2D limit under compression, while in 3D only one anomalous region is observed. In this direction, we perform Molecular Dynamics simulations to unveil the details about the structural behavior in the quasi-2D limit of a core-softened colloid. The fluid was confined between highly repulsive solvophobic walls, and the behavior at distinct wall separation and colloid density was analyzed. Our results indicated a straight relation between the 2D or 3D-like behavior and the layers separation. We can relate that if the system behaves as independent 2D-layers, it will have a 2D-like behavior. However, for some separations the layers are connected, with colloids hopping from one layer to another – having then a 3D-like structural behavior. Those findings fill the gap in the depiction of the anomalous behavior from 2D to 3D.

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Section: Of 12mentioning

confidence: 89%

Section: Methods and Simulation Detailsmentioning

confidence: 99%

Section: Of 12mentioning

confidence: 99%

Section: Of 12mentioning

confidence: 99%

See 2 more Smart Citations

How Dimensionality Affects the Structural Anomaly in a Core-Softened Collo

Krott¹,

Bordin²

2023

Preprint

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“…The competi-tions, usually between a Short range Attraction and a Long range Repulsion -the so-called SALR colloids, arise once distinct conformations compete to rule the suspension behavior. [22][23][24] The short range attraction is caused by van der Walls forces or solvent effects, 25 while the long range repulsion can be generated by many factors. For instance, it can be caused by electrostatic repulsion in charged colloids and molecules, 26,27 or by soft shells ad in the case of spherical colloids obtained by PEG aggregates [28][29][30] or even by a polymeric brush, as metallic NP [31][32][33][34][35] decorated with polymers and star polymers.…”

Section: Introductionmentioning

confidence: 99%

Hard core-soft shell particles near repulsive interfaces: interplay between adsorption, aggregation and diffusion

Marques,

Bordin

2021

Preprint

Self Cite

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The behavior of colloidal particles with a hard core and a soft shell has attracted the attention for researchers in the physical-chemistry interface not only due the large number of applications, but due the unique properties of these systems in bulk and at interfaces. The adsorption at the boundary of two phases can provide information related to a fluid to clusters transition and with a minima in the contact layer diffusion -and is explained by the competition between the scales in the core-softened interaction. Due the long range repulsion, the particles stay at the distance correspondent to this length scale at low densities, and overcome the repulsive barrier as the packing increases, However, increasing the temperature, the gain in kinetic energy allows the colloids to overcome the long range repulsion barrier even at low densities. As consequence, there is no competition and no maxima was observed in the adsorption.

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Interplay between adsorption, aggregation and diffusion in confined core-softened colloids

Marques

Bordin

2021

JCIS Open

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Structural behavior of a two length scale core-softened fluid in two dimensions

Cited by 16 publications

References 68 publications

How Dimensionality Affects the Structural Anomaly in a Core-Softened Collo

How Dimensionality Affects the Structural Anomaly in a Core-Softened Collo

Hard core-soft shell particles near repulsive interfaces: interplay between adsorption, aggregation and diffusion

Interplay between adsorption, aggregation and diffusion in confined core-softened colloids

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