Effective interaction between large colloidal particles immersed in a bidisperse suspension of short-ranged attractive colloids

2009 ◽  
Vol 131 (16) ◽  
pp. 164111 ◽  
Author(s):  
A. Jamnik
Keyword(s):  
Colloidal Particles ◽  
Effective Interaction ◽  
Bidisperse Suspension

Effective interaction between hard sphere colloidal particles in a polymerizing Yukawa solvent

1999 ◽  
Vol 110 (16) ◽  
pp. 8189-8196 ◽  
Author(s):  
R. H. Gee ◽  
D. Henderson ◽  
A. Kovalenko
Keyword(s):  
Hard Sphere ◽  
Colloidal Particles ◽  
Effective Interaction

scholarly journals Ion-specific thermodynamical properties of aqueous proteins

2010 ◽  
Vol 82 (1) ◽  
pp. 109-126 ◽  
Author(s):  
Eduardo R.A. Lima ◽  
Evaristo C. Biscaia Jr. ◽  
Mathias Boström ◽  
Frederico W. Tavares
Keyword(s):  
Electrostatic Interactions ◽  
Colloidal Particles ◽  
Effective Interaction ◽  
Virial Coefficients ◽  
Water Structure ◽  
Hydrophobic Surface ◽  
Colloidal Systems ◽  
Salt Solutions ◽  
Monovalent Ions ◽  
Pharmaceutical Industries

Ion-specific interactions between two colloidal particles are calculated using a modified Poisson-Boltzmann (PB)equationandMonteCarlo(MC)simulations. PBequationspresentgoodresultsofionicconcentration profiles around a macroion, especially for salt solutions containing monovalent ions. These equations include not only electrostatic interactions, but also dispersion potentials originated from polarizabilities of ions and proteins. This enables us to predict ion-specific properties of colloidal systems. We compared results obtained from the modified PB equation with those from MC simulations and integral equations. Phase diagrams and osmotic second virial coefficients are also presented for different salt solutions at different pH and ionic strengths, in agreement with the experimental results observed Hofmeister effects. In order to include the water structure and hydration effect, we have used an effective interaction obtained from molecular dynamics of each ion and a hydrophobic surface combined with PB equation. The method has been proved to be efficient and suitable for describing phenomena where the water structure close to the interface plays an essential role. Important thermodynamic properties related to protein aggregation, essential in biotechnology and pharmaceutical industries, can be obtained from the method shown here.

Effective interaction between charged colloidal particles near a surface

1998 ◽  
Vol 95 (3) ◽  
pp. 649-655 ◽  
Author(s):  
DAVID GOULDING ◽  
JEAN-PIERRE HANSEN
Keyword(s):  
Colloidal Particles ◽  
Effective Interaction

Effective interaction between charged colloidal particles near a surface

1998 ◽  
Vol 95 (3) ◽  
pp. 649-655 ◽  
Author(s):  
DAVID GOULDING JEAN-PIERRE HANSEN
Keyword(s):  
Colloidal Particles ◽  
Effective Interaction

Effective interaction between soft core colloidal particles

2000 ◽  
Vol 112 (24) ◽  
pp. 11107-11108 ◽  
Author(s):  
S. Amokrane ◽  
M. Bouaskarne
Keyword(s):  
Colloidal Particles ◽  
Effective Interaction ◽  
Soft Core

Theory and calculation of colloidal depletion interaction

2018 ◽  
Vol 32 (18) ◽  
pp. 1840005 ◽  
Author(s):  
Hongru Ma
Keyword(s):  
Hard Sphere ◽  
Density Functional ◽  
Colloidal Particles ◽  
Hard Spheres ◽  
Effective Interaction ◽  
Density Functional Theory Method ◽  
Ratio Method ◽  
Colloidal System ◽  
Colloidal Systems ◽  
Depletion Interaction

Colloidal dispersion is composed of particles with size ranging from 1 nm to [Formula: see text]m dispersed in solvents. There are the volume exclusion interaction and other interactions between colloidal particles, of which the former interaction causes the depletion effect. When a big sphere is immersed in the colloidal system of small spheres, there is a depletion layer around the big sphere where the center of small sphere cannot enter. The depletion layers of two big spheres overlap if they are close to each other, increasing the free volume accessed by small spheres and thereby enlarging the entropy of the system. As a result, an effective interaction between the two big spheres is resulted from the change of entropy as a function of their distance, which is referred to as the depletion interaction. This paper first introduces the concept and scenario of the depletion interaction in colloidal systems. Then we briefly introduce various numerical or simulations methods of the depletion interaction of hard sphere systems, such as the acceptance ratio method, Wang–Landau method, and the density functional theory method. Taking the Asakura–Oosawa model as an example, we introduce a useful approximation method, Derjaguin approximation as well as the derivation of some approximate formula for the depletion interaction of different hardcore colloidal systems, such as between a pair of spheres in mono-disperse small spheres, between a hard sphere and a hard wall in a liquid of small spheres, and between a pair of hard spheres in a liquid of thin rods and thin disks.

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