67 citations · 325 across the 20 of their papers we have counts for
20 papers
Titration in Canonical and Grand-Canonical Ensembles
Amin Bakhshandeh, Yan Levin
We discuss problems associated with the notion of pH in heterogeneous systems. For homogeneous systems, standardization protocols lead to a well defined quantity, which although di…
Interaction between two overall neutral charged microscopically patterned surfaces
Shiqi Zhou, Amin Bakhshandeh
We study the interaction between heterogeneously charged surfaces in an electrolyte solution by employing classical Density Functional Theory (cDFT) and Monte Carlo simulations. We…
Charge fluctuations in charge regulated systems: dependence on statistical ensemble
Amin Bakhshandeh, Yan Levin
We investigate charge regulation of nanoparticles in concentrated suspensions, focusing on the effect of different statistical ensembles. We find that the choice of ensemble does n…
Comment on "Simulations of ionization equilibria in weak polyelectrolyte solutions and gels" by J. Landsgesell, L. Nová, O. Rud, F. Uhlík, D. Sean, P. Hebbeker, C. Holm and P. Ko\v sovan, Soft Matter, 2019,15, 1155-1185
Yan Levin, Amin Bakhshandeh
In a recent review~Landsgesell et al., Soft Matter {\bf 15}, 1155 (2019) stated that is a ``universal parameter" for titrating systems. We show that this…
A new method for reactive constant pH simulations
Yan Levin, Amin Bakhshandeh
We present a simulation method that allows us to calculate the titration curves for systems undergoing protonation/deprotonation reactions -- such as charged colloidal suspensions…
Theory of Charge Regulation of Colloidal Particles in Electrolyte Solutions
Amin Bakhshandeh, Derek Frydel, Yan Levin
We present a theory that enables us to calculate the effective surface charge of colloidal particles and to efficiently obtain titration curves for different salt concentrations. T…
Widom insertion method in simulations with Ewald summation
Amin Bakhshandeh, Yan Levin
We discuss the application of Widom insertion method for calculation of the chemical potential of individual ions in computer simulations with Ewald summation. Two approaches are c…
Equilibrium conformations and surface charge regulation of spherical polymer brushes in stretched regimes
Amin Bakhshandeh, Maximiliano Segala, Thiago Colla
In the present work, we study the equilibrium conformations of linear polyelectrolytes tethered onto a spherical, oppositely charged core in equilibrium with an ionic reservoir of…
Reactive Monte Carlo Simulations for Charge Regulation of Colloidal Particles
Amin Bakhshandeh, Derek Frydel, Yan Levin
We use a reactive Monte Carlo simulation method and primitive model of electrolyte to study acid-base equilibrium that controls charge regulation in colloidal systems. The simulati…
Interaction between charge-regulated metal nanoparticles in an electrolyte solution
Amin Bakhshandeh, Alexandre P. dos Santos, Yan Levin
We present a theory which allows us to calculate the interaction potential between charge-regulated metal nanoparticles inside an acid-electrolyte solution. The approach is based o…
Electrolytes in regimes of strong confinements: surface charge modulations, osmotic equilibrium and electroneutrality
Amin Bakhshandeh, Maximiliano Segala, Thiago Colla
In the present work, we study an electrolyte solution confined between planar surfaces with nonopatterned charged domains, which has been connected to a bulk ionic reservoir. The s…
Charge regulation of colloidal particles in aqueous solutions
Amin Bakhshandeh, Derek Frydel, Yan Levin
We study charge regulation of colloidal particles inside aqueous electrolyte solutions. To stabilize colloidal suspension against precipitation, colloidal particles are synthesized…
Theoretical investigation of a polarizable colloid in the salt medium
Amin Bakhshandeh
In the present work, we have extended a weak coupling theory [A. Bakhshandeh, A. P. dos Santos and Y. Levin Phys. Rev. Lett 107, 107801 (2011)] for systems with added 1:1 electroly…
Osmotic stress and pore nucleation in charged biological nanoshells and capsids
Thiago Colla, Amin Bakhshandeh, Yan Levin
A model system is proposed to investigate the chemical equilibrium and mechanical stability of biological spherical-like nanoshells in contact with an aqueous solution with added d…
Adsorption of polyelectrolytes on charged microscopically patterned surfaces
Amin Bakhshandeh, Maximiliano Segala
In the present study, we have investigated, using Monte Carlo simulations (MC), the adsorption of polyelectrolytes on the charged nanopatterned surfaces. Different surface patterns…
Charge Regulation of Colloidal Particles: Theory and Simulations
Amin Bakhshandeh, Derek Frydel, Alexandre Diehl +1
To explore charge regulation (CR) in physicochemical and biophysical systems, we present a model of colloidal particles with sticky adsorption sites which account for the formation…
Adsorption isotherms of charged nanoparticles
Alexandre P. dos Santos, Amin Bakhshandeh, Alexandre Diehl +1
We present theory and simulations which allow us to quantitatively calculate the amount of surface adsorption excess of charged nanoparticles onto a charged surface. The theory is…
Interaction between random heterogeneously charged surfaces in an electrolyte solution
Amin Bakhshandeh, Alexandre P. dos Santos, Alexandre Diehl +1
We study, using Monte Carlo simulations, the interaction between infinite heterogeneously charged surfaces inside an electrolyte solution. The surfaces are overall neutral with que…
Weak and Strong Coupling Theories for Polarizable Colloids and Nano-Particles
Amin Bakhshandeh, Alexandre Pereira dos Santos, Yan Levin
A theory is presented which allows us to accurately calculate the density profile of monovalent and multivalent counterions in suspensions of polarizable colloids or nano-particles…
Effects of the dielectric discontinuity on the counterion distribution in a colloidal suspension
Alexandre Pereira dos Santos, Amin Bakhshandeh, Yan Levin
We introduce a new method for simulating colloidal suspensions with spherical colloidal particles of dielectric constant different from the surrounding medium. The method uses exac…