A. Golchoobi, A. Khosravi, H. Modarress, A. Ahmadzadeh. Effect of Charge, Size and Temperature on Stability of Charged Colloidal Nano Particles[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 617-624. doi: 10.1088/1674-0068/25/05/617-624
Citation: A. Golchoobi, A. Khosravi, H. Modarress, A. Ahmadzadeh. Effect of Charge, Size and Temperature on Stability of Charged Colloidal Nano Particles[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 617-624. doi: 10.1088/1674-0068/25/05/617-624

Effect of Charge, Size and Temperature on Stability of Charged Colloidal Nano Particles

doi: 10.1088/1674-0068/25/05/617-624
  • Received Date: 2012-06-11
  • Molecular simulation of charged colloidal suspension is performed in NVT canonical ensemble using Monte Carlo method and primitive model. The well-known Derjaguin-Landau-Verwey-Overbeek theory is applied to account for effective interactions between particles. Effect of temperature, valance of micro-ions and the size of colloidal particles on the phase stability of the solution is investigated. The results indicate that the suspension is more stable at higher temperatures. On the other hand, for a more stable suspension to exist, lower micro-ion valance is favorable. For micro-ions of higher charge the number of aggregates and the number of particle in each of aggregate on average is higher. However for the best of our results larger colloidal particle are less stable. Comparing the results with theoretical formula considering the influence of surface curvature shows qualitative consistency.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Effect of Charge, Size and Temperature on Stability of Charged Colloidal Nano Particles

doi: 10.1088/1674-0068/25/05/617-624

Abstract: Molecular simulation of charged colloidal suspension is performed in NVT canonical ensemble using Monte Carlo method and primitive model. The well-known Derjaguin-Landau-Verwey-Overbeek theory is applied to account for effective interactions between particles. Effect of temperature, valance of micro-ions and the size of colloidal particles on the phase stability of the solution is investigated. The results indicate that the suspension is more stable at higher temperatures. On the other hand, for a more stable suspension to exist, lower micro-ion valance is favorable. For micro-ions of higher charge the number of aggregates and the number of particle in each of aggregate on average is higher. However for the best of our results larger colloidal particle are less stable. Comparing the results with theoretical formula considering the influence of surface curvature shows qualitative consistency.

A. Golchoobi, A. Khosravi, H. Modarress, A. Ahmadzadeh. Effect of Charge, Size and Temperature on Stability of Charged Colloidal Nano Particles[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 617-624. doi: 10.1088/1674-0068/25/05/617-624
Citation: A. Golchoobi, A. Khosravi, H. Modarress, A. Ahmadzadeh. Effect of Charge, Size and Temperature on Stability of Charged Colloidal Nano Particles[J]. Chinese Journal of Chemical Physics , 2012, 25(5): 617-624. doi: 10.1088/1674-0068/25/05/617-624

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