40 citations · 220 across the 29 of their papers we have counts for
30 papers
Self-Diffusion and Structure of a Quasi Two-Dimensional, Classical Coulomb Gas Under Increasing Magnetic Field and Temperature
J. D. Hernández Velázquez, Z. Nussinov, A. Gama Goicochea
The influence of a magnetic field applied perpendicularly to the plane of a quasi two dimensional, low density classical Coulomb gas, with interparticle potential U of r as 1 over…
The Effective Interfacial Tensions between Pure Liquids and Rough Solids: A Coarse-Grained Simulation Study
Juan de Dios Hernández Velázquez, Gregorio Sánchez-Balderas, Armando Gama Goicochea +1
The effective solid liquid interfacial tension (SL IFT) between pure liquids and rough solid surfaces is studied through coarse grained simulations. Using the dissipative particle…
The Viscosity of Polyelectrolyte Solutions and its Dependence on their Persistence Length, Concentration and Solvent Quality
Estela Mayoral, Juan de Dios Hernández Velázquez, Armando Gama Goicochea
In this work, a comprehensive study about the influence on shear viscosity of polyelectrolyte concentration, persistence length, salt concentration and solvent quality is reported,…
Topological Phase Transition in a Quasi Two Dimensional Coulomb Gas
A. Gama Goicochea, Z. Nussinov
A system with equal number of positive and negative charges confined in a box with a small but finite thickness is modeled as a function of temperature using mesoscale numerical si…
Modeling of Branched Thickening Polymers under Poiseuille Flow Gives Clues as to how to Increase a Solvent Viscosity
E. Mayoral, A. Gama Goicochea
The viscosity enhancement of a solvent produced by the addition of thickening branched polymers is predicted as a function of polymer concentration, branch length and persistence l…
Self assembly of model surfactants as reverse micelles in nonpolar solvents and their role as interfacial tension modifiers
E. Mayoral, J. A. Arcos-Casarrubias, A. Gama Goicochea
The self assembly of linear surfactants into reverse micelles (RMs) in nonpolar solvents and their efficiency in reducing the interfacial tension is studied using dissipative parti…
Study of polymer solvent interactions of complex polysiloxanes using dissipative particle dynamics
Javier Vallejo-Montesinos, Antonio Villegas, Jorge Cervantes +2
The mesoscopic modeling of three polysiloxanes in solution is reported in this work, with the purpose of predicting their physicochemical properties as functions of the quality of…
Surfactant chain length and concentration influence on the interfacial tension of two immiscible model liquids a coarse grained approach
R. Catarino Centeno, R. A. Bustamante - Rendón, J. S. Hernández - Fragoso +4
The interfacial tension between immiscible liquids is studied as a function of a model linear surfactant length and concentration using coarse grained, dissipative particle dynamic…
Desorption of hydrocarbon chains by association with ionic and nonionic surfactants under flow as a mechanism for enhanced oil recovery
Ketzasmin A. Terrón-Mejía, Roberto López-Rendon, Armando Gama Goicochea
The need to extract oil from wells where it is embedded on the surfaces of rocks has led to the development of new and improved enhanced oil recovery techniques. One of those is th…
Scaling features of the tribology of polymer brushes of increasing grafting density around the mushroom to brush transition
E. Mayoral, J. Klapp, A. Gama Goicochea
Non equilibrium coarse grained, dissipative particle dynamics simulations of complex fluids, made up of polymer brushes tethered to planar surfaces immersed in a solvent yield non…
On finite size effects, ensemble choice and force influence in dissipative particle dynamics simulations
Miguel Ángel Balderas Altamirano, Elías Pérez, Armando Gama Goicochea
The influence of finite size effects, choice of statistical ensemble and contribution of the forces in numerical simulations using the dissipative particle dynamics (DPD) model are…
Scaling properties of soft matter in equilibrium and under stationary flow
Armando Gama Goicochea
A brief review is presented of the scaling of complex fluids, polymers and polyelectrolytes in solution and in confined geometry, in thermodynamical, structural and rheology proper…
Ab Initio Modeling Of Friction Reducing Agents Shows Quantum Mechanical Interactions Can Have Macroscopic Manifestation
J. D. Hernández Velázquez, J. Barroso Flores, A. Gama Goicochea
Two of the most commonly encountered friction reducing agents used in plastic sheet production are the amides known as erucamide and behenamide, which despite being almost identica…
Electrostatics in dissipative particle dynamics using Ewald sums with point charges
K. A. Terrón-Mejía, R. López-Rendón, A. Gama Goicochea
A proper treatment of electrostatic interactions is crucial for the accurate calculation of forces in computer simulations. Electrostatic interactions are typically modeled using E…
Adsorption of polyelectrolytes on silica and gold surfaces
M. A. Balderas Altamirano, R. Camacho, E. Pérez +1
The results of a study that helps understand the mechanisms of adsorption of polyelectrolytes on particles, using numerical simulation methods, specifically the one known as dissip…
Friction coefficient and viscosity of polymer brushes with and without free polymers as slip agents
A. Gama Goicochea, R. López-Esparza, M. A. Balderas Altamirano +3
There is ample evidence that polymer brushes reduce friction between surfaces. Several industrial applications take advantage of this fact, such as those in plastic bag production,…
A new effective potential for colloidal dispersions with polymer chains emerging from mesoscopic scale interactions
K. A. Terrón-Mejía, R. López-Rendón, A. Gama Goicochea
A new potential of mean force is proposed for colloidal dispersions, which is obtained from coarse grained, pair interactions between colloidal particles formed by the explicit gro…
Rheological properties of brushes on cancerous epithelial cells under the influence of an external oscillatory force
J. D. Hernández Velázquez, S. Mejía-Rosales, A. Gama Goicochea
The rheological properties of brushes of different length on the surface of human epithelial cancerous cells are studied here by means of coarse grained numerical simulations, wher…
Importance of molecular interactions in colloidal dispersions
R. Lopez-Esparza, M. A. Balderas Altamirano, E. Pérez +1
We review briefly the concept of colloidal dispersions, their general properties and some of their most important applications, as well as the basic molecular interactions that giv…
Importance of pore length and geometry in the adsorption/desorption process: a molecular simulation study
M. A. Balderas Altamirano, S. Cordero, R. López-Esparza +2
Discrete potentials can describe properly the liquid vapor boundary that is necessary to model the adsorption of gas molecules in mesoporous systems with computer simulations. Alth…
On the computational modeling of the viscosity of colloidal dispersions and its relation with basic molecular interactions
A. Gama Goicochea, M. A. Balderas Altamirano, R. Lopez-Esparza +2
The connection between fundamental interactions acting in molecules in a fluid and macroscopically measured properties, such as the viscosity between colloidal particles coated wit…
Scaling law of the disjoining pressure reveals two dimensional structure of polymeric fluids
Armando Gama Goicochea, Elías Pérez
A scaling relation for the disjoining pressure of strongly confined polymer fluids is proposed for the first time, which yields directly the scaling exponent, nu, of the radius of…
The role of the dissipative and random forces in the calculation of the pressure of simple fluids with dissipative particle dynamics
A. Gama Goicochea, M. A. Balderas Altamirano, J. D. Hernández +1
The role of viscous forces coupled with Brownian forces in momentum conserving computer simulations is studied here in the context of their contribution to the total average pressu…
Hyperscaling relation between the interfacial tension of liquids and their correlation length near the critical point
E. Mayoral, A. Gama Goicochea
Interfaces involving coexisting phases in condensed matter are essential in various examples of soft matter phenomena such as wetting, nucleation, morphology, phase separation kine…