A macroion correlation effect on the structure of charged stabilized colloidal suspensions: a self-consistent integral equation study
Tóm tắt
Using the mean field Poisson–Boltzmann (PB) and the Ornstein–Zernike (OZ) integral equation theories, we have determined the macroions effective interactions and the structure of charged stabilized colloidal suspension for a large charge range of macroion and screening parameter values. The renormalized parameters are calculated by solving the PB equation written in the framework of the modified Jellium model. The structures have been determined by solving the OZ equation coupled with a self-consistent integral equation, which is related to the Verlet’s modified closure. Our results of the effective parameters are in good agreement with the experimental data, also the structure presents acceptable improvement compared to the Monte Carlo simulation data, against the HNC structure results, PACS: 61.20 Gy, 82.70 Dd, and 82.70 Kj.
Tài liệu tham khảo
Martin-Molina A, Quesada-Pérez M, Galisteo-Gonzàlez F, Hidalgo-Alvarez R (2002) Looking into overcharging in model colloids through electrophoresis: asymmetric electrolytes. J Chem Phys 118:4183–4189
Attard F (1996) Electrolyte and the electric double layer. Adv Chem Phys 92:1–88
Levin Y (2004) Introduction of statistical mechanics of charged system. Braz J Phys 34:1158–1176
Giacometti A, Gazzillo D, Pastore G, Das TK (2005) Numerical study of a binary Yukawa model in regimes characteristic of globular proteins in solutions. Phys Rev E 71:031108–031117
Levin Y (2002) Electrostatic correlation from plasma to biology. Rep Prog Phys 65:1577–1644
Belloni L (2000) Colloidal interactions. J. Phys. Condens. Matter 12: R549
Diehl A, Barbosa M, Levin Y (2001) Charge renormalization and phase separation in colloidal suspension. Euro Phys Lett 53:86–92
Diehl A, Levin Y (2004) Effective charge of colloidal particles. J Chem Phys 121:12100–12103
Bostrom M, Tavares EW, Bratko D, Ninham BW (2005) Specific ion effects in simulation of globular protein: comparison between analytical model and simulation. J Phys Chem 109:24489–24494
Kjellander R (2007) Fundamental aspect of electrostatic interactions and charge renormalization in electrolyte systems. Colloidal Journal 69:20–28
Archer AJ, Hopking P, Evan R (2006) Screening in Yukawa fluid mixtures. Phys Rev E 74:010402–010405
Hansen J-P, Löwen A (2000) Effective interaction between electric double layers. Annu Rev Phys Chem 51:209–242
Dobnirar J, Castañeda-Piegro R, Grünberg H, Trizac E (2006) Testing the relevancy of the effective interaction potentials between highly charged colloids in suspension. New J Phys 8:277–303
Castañeda-Piegro R, Rojas-Ochoa LF, Lobaskin V, Mixteco-Sanchez C (2006) Macroion correlation effects in electrostatic screening and thermodynamic highly charged colloids. Phys Rev E 74:051408–051414
Lomba E, Alvarez M, Lee LL, Almanza NG (1995) Phase stability of binary non additive hard sphere mixtures: a self-consistent integral equation study. J Chem Phys 104:4180–4188
Trizac E, Boquet L, Aubouy M (2002) Simple approach for charge renormalization in highly charged macroions. Phys Rev Lett 89:248301
Trizac E, Dobnikar J, Belloni L, Von Grünberg HH, Castañeda-Piegro R (2007) Macroion virial contribution to the osmotic pressure in charge-stabilized colloidal suspensions. Phys Rev 75:011401–011408
Lomba E, Lee LL (1996) Consistency conditions for the integral equations of liquid structures. Int J Thermophys 17:663–672
Rojas-Ochoa LF, Castañeda-Piegro R, Lobaskin V, Stradner A, Schurlinberger P (2008) Density dependence interactions and structure of charged colloidal dispersion in the weak screening regime. Phys Rev Lett 100:178304–178307
Linse P (2000) Structure, phase stability, and thermodynamics in charged colloidal solutions. J Chem Phys 113:4359–4373
Lobaskin V, Qamhieh K (2003) Effective macroion charge and stability of highly asymmetric electrolytes at various salt conditions. J Phys Chem B 107:8022–8029