Electrophoretic Particle Aggregation

Nichols, Scott C.; Loewenberg, Michael; Davis, Robert H.

doi:10.1006/jcis.1995.9959

Cited by 31 publications

(39 citation statements)

References 8 publications

(11 reference statements)

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“…5 to 8 and are discussed in Sections 3.1 to 3.4 below. The figures highlight the extensive range of two particle interactions in the presence of both van der Waals and electrostatic forces for oppositely buoyant spheres (␥ Ͻ 0) and thus extend the trajectory analyses presented in (26,27,35). Figure 5 shows the relative particle trajectories in a frame of reference travelling with the bubble for the case when there is only one critical point along ϭ and there are no critical points along ϭ 0.…”

Section: Figmentioning

confidence: 92%

“…When 1 and 2 are of opposite sign then the electrostatic force is always attractive, while if 1 ϭ 2 the electrostatic force is always repulsive. The transition between attraction and repulsion results from changes in the surface charges on the spheres as the separation distance varies while maintaining constant surface potentials (26,32,34). Figure 2 illustrates the fundamental difference in the electrostatic force when the zeta potential of the spheres are of like and unlike sign.…”

Section: The Mathematical Formulationmentioning

confidence: 97%

“…References (24) and (27) only included the influence of van der Waals forces, while references (25) and (26) incorporated both the influence of van der Waals forces and electrostatic forces. The current paper examines the influence of van der Waals forces and electrostatic forces in a parameter regime of relevance to microbubble flotation and the implementation of the mathematical model has been validated by comparison with (26,27). A comprehensive discussion of the different modes of particle capture is presented and it is demonstrated that the mathematical model can be used to optimize the efficiency of microbubble flotation with regards to bubble-particle collision.…”

Section: Figmentioning

confidence: 97%

“…Qualitatively, however, the trajectories can be analyzed by examining the critical points of Eqs. [15] and [16] as discussed by (26), where it is noted that since time is only a parameter in the dynamical system it follows that the relative trajectories of particles flowing around the bubble cannot cross each other. The critical points of the system are important because relative particle trajectories can only originate upstream at infinity or from critical points, and relative trajectories can only terminate downstream at infinity, at critical points, or with bubble-particle collision.…”

Section: Trajectory Analysismentioning

confidence: 99%

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Trajectory Analysis and Collision Efficiency during Microbubble Flotation

Leppinen

1999

Journal of Colloid and Interface Science

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Section: Figmentioning

confidence: 92%

Section: The Mathematical Formulationmentioning

confidence: 97%

Section: Figmentioning

confidence: 97%

Section: Trajectory Analysismentioning

confidence: 99%

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Trajectory Analysis and Collision Efficiency during Microbubble Flotation

Leppinen

1999

Journal of Colloid and Interface Science

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“…This distortion has an influence on the rate of coagulation. Experimental observations and theoretical predictions indicate that electrophoresis can induce coagulation (electrophoretic particle aggregation) [33], an effect that can be expected to be dependent on the electric field strength. Fig.…”

Section: Coagulationmentioning

confidence: 99%

Characterization of nanoparticles by capillary electromigration separation techniques

Pyell¹

2010

Electrophoresis

133

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Considering the large number of papers presented in the last years in the field of CE and plate gel electrophoresis (PGE) of nanoparticles and nanoparticle-biomolecule conjugates, this review article gives an overview on the application of capillary electromigration separation techniques for the separation of nanoparticles and nanoparticle-biomolecule conjugates according to differences in size and/or zeta potential and for the determination of several physicochemical parameters characterizing a population of nanoparticles. A brief introduction is given into the theoretical background of the size-selective electrophoretic separation of nanospheres in free-solution and sieving media including involvement of interparticle interactions. Some aspects of colloidal system stability are discussed. Applications of capillary electromigration techniques in the field of size-selective and/or surface charge density-selective separation of nanoparticles and nanoparticle-biomolecule conjugates are described, including free-solution CE, CGE, IEF, and ITP, complemented by an overview on the application of (semipreparative) PGE in the field of nanotechnology and nanobiotechnology. The review also includes actual developments regarding the coupling of capillary electromigration techniques to (wavelength-resolved) LIF and other selective detection methods and studies concerning individual-particle CE.

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Separation and characterization of sub-μm- and μm-sized particles by capillary zone electrophoresis

2002

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The analytical separation and characterization of particles in the size range of sub-microm and microm diameters by capillary zone electrophoresis (CZE) has been reviewed. The theoretical basis, on which the mobility can be interpreted to provide information regarding characteristics of particle surface, has shortly been presented. Particular emphasis was put on the model dependence of that interpretation and the need in most applications to forego the classical idealized model of spherical particles with "smooth" surfaces and to apply more realistic models, which take the "hairy" surface of real particles into account. Some highlights of the literature on the CZE of polystyrene latex microspheres, organic and inorganic colloids, lipoprotein particles, viruses, liposomes, biological membrane vesicles, and biological cells have been discussed. Also summarized are the reports on the particle size dependence of mobility and peak broadening in CZE and on electrophoretic behavior of rodlike particles and particle aggregates. Finally, the effects of neutral polymers in the background electrolyte on particle mobility and peak width are reviewed.

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Electrophoretic Particle Aggregation

Cited by 31 publications

References 8 publications

Trajectory Analysis and Collision Efficiency during Microbubble Flotation

Trajectory Analysis and Collision Efficiency during Microbubble Flotation

Characterization of nanoparticles by capillary electromigration separation techniques

Separation and characterization of sub-μm- and μm-sized particles by capillary zone electrophoresis

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