Effects of the counter ion valency on the colloidal interaction between two cylindrical particles

Inho Lee, Hyunbae Dong, Juyoung Choi, Sangyup Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, the effects of counter ion valency of the electrolyte on the colloidal repulsion between two parallel cylindrical particles were investigated. Electrostatic interactions of the cylindrical particles were calculated with the variation of counter ion valency. To calculate the electrical repulsive energy working between these two cylindrical particles, Derjaguin approximation was applied. The electrostatic potential profiles were obtained numerically by solving nonlinear Poission-Boltzmann (P-B) equation and calculating middle point potential and repulsive energy working between interacting surfaces. The electrical potential and repulsive energy were influenced by counter ion valency, Debye length, and surface potential. The potential profile and middle point potential decayed with the counter ion valency due to the promoted shielding of electrical charge. On the while, the repulsive energy increased with the counter ion valency at a short separation distance. These behaviors of electrostatic interaction agreed with previous results on planar or spherical surfaces.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalBulletin of the Korean Chemical Society
Volume30
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

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Radiation counters
Coulomb interactions
Boltzmann equation
Shielding
Electrolytes
Electrostatics

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

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abstract = "In this study, the effects of counter ion valency of the electrolyte on the colloidal repulsion between two parallel cylindrical particles were investigated. Electrostatic interactions of the cylindrical particles were calculated with the variation of counter ion valency. To calculate the electrical repulsive energy working between these two cylindrical particles, Derjaguin approximation was applied. The electrostatic potential profiles were obtained numerically by solving nonlinear Poission-Boltzmann (P-B) equation and calculating middle point potential and repulsive energy working between interacting surfaces. The electrical potential and repulsive energy were influenced by counter ion valency, Debye length, and surface potential. The potential profile and middle point potential decayed with the counter ion valency due to the promoted shielding of electrical charge. On the while, the repulsive energy increased with the counter ion valency at a short separation distance. These behaviors of electrostatic interaction agreed with previous results on planar or spherical surfaces.",
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Effects of the counter ion valency on the colloidal interaction between two cylindrical particles. / Lee, Inho; Dong, Hyunbae; Choi, Juyoung; Lee, Sangyup.

In: Bulletin of the Korean Chemical Society, Vol. 30, No. 3, 01.03.2009, p. 567-572.

Research output: Contribution to journalArticle

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