Further, we demonstrate that a judicious choice of ions for multicomponent solutes can also be used to gain exquisite control of the phenomenon. We compute w aa as the interaction energy between two. An outgrowth of an earlier text by coauthor jacob masliyah, this selfcontained. Journal of colloid and interface science 309 2007 194224 1. Forces, dynamics and rheology, and novel characterization tools. Electrokinetic phenomena article about electrokinetic. The equations governing the ion distribution, electrostatic potential and hydrodynamic flow field around the particle, are modified to allow for the lateral. Electrokinetic and colloid transport phenomena masliyah, jacob h. Get an answer for explain electrostatic phenomena in terms of the movement of electrons.
Sizedependent control of colloid transport via solute gradients in. Electrokinetic phenomena a group of effects that are observed in disperse systems and in capillaries and. The term heterogeneous here means a fluid containing particles. Pdf electrokinetic and colloid transport phenomena semantic. Attachment of colloidal fine particles onto the rock surface could be a promising. Additionally, the phenomena we have uncovered could potentially be harnessed in novel microfluidic applications, whose technological implications range from labonachip devices to personalised medicine. Purchase theory of colloid and interfacial electric phenomena, volume 12 1st edition. The inducedcharge electrokinetic icek phenomena are relatively new area of research in microfluidics and nanofluidics. We give a general, physical description of inducedcharge electroosmosis iceo, the nonlinear electrokinetic slip at a polarizable surface, in the context of some new techniques for microfluidic pumping and mixing. Santiago department of mechanical engineering, stanford university, stanford, california 94305 electrokinetic transport in fluidic channels facilitates control and separation of ionic species. Measurement and interpretation of electrokinetic phenomena measurement and interpretation of electrokinetic phenomena delgado, a. Different from the traditional electrokinetic phenomena which are based on the interactions between applied electric field and the electrostatic charge, the icek phenomena result from the interaction of the applied electric field and the induced charge on polarisable surfaces. Touchard2 1ies, university of montpellier, france 2lea, university of poitiers, france abstractthe origin of geomagnetism is unknown. Av is the surface tension of a in contact with vapor vacuum.
Electrokinetic phenomena are a family of several different effects that occur in heterogeneous fluids, or in porous bodies filled with fluid, or in a fast flow over a flat surface. An energy map model for colloid transport archive ouverte hal. Electric mobility and charge of proteins in alcoholwater mixtures. This is the reason that electrophoretic separation of dna or other large molecules is usually done in a gel, rather in free solution. Request pdf electrokinetic and colloid transport phenomena liquid flow in channels electroosmotic flow in a slit charged microchannel electroosmotic flow in a closed slit microchannel. A new, definitive perspective of electrokinetic and colloid transport processes responding to renewed interest in the subject of electrokinetics, electrokinetic and colloid transport phenomena is a timely overview of the latest research and applications in this field for both the beginner and the professional.
Chemical engineering research college of engineering. Electrokinetic phenomena scale favorably with miniaturization and offer unique advantages in micro. Electrokinetic phenomena generally refer to the tangential motion of liquids with respect to charged solid surfaces, and the measurement of these phenomena provide important information on the structure of electrical double layers 29, 30. Electrokinetic phenomena an overview sciencedirect topics. Subsurface transport of plutonium pu may be facilitated by the formation of intrinsic pu colloids. In this study we report on the electrokinetic behavior of colloidal aggregates of c60fullerenes nc60 produced through two different techniques. In nanometerscale electrokinetic systems, the electric double layer. The electrophoretic velocities of gelatin, eggalbumin, and gliadincovered quartz particles in various alcoholwater solutions are, within the limits employed in usual experimental procedures, proportional to the field strength. Measurement and interpretation of electrokinetic phenomena. Introduction electrokinetic salt rejection in porous media and membranes electroosmotic control of hazardous wastes iontophoretic delivery of drugs fl. This method is based on the fact that charged suspended particles. These effects govern the translocation process, and thus have consequences for better control of single molecule sensing. Remediation of colloidfacilitated contaminant transport in saturated.
Electrophoresis is the most suitable electrokinetic method to study particulate solids. Edited by motoyoshi kobayashi, ryoichi yamamoto, satoshi nishimura. In the first technique, used to produce colloidal materials in several recent toxicity and transport studies, an organic solvent such as tetrahydrofuran thf is used to dissolve the c60 before mixing. Phoretic transport is defined as the movement of colloidal particles by. Electrokinetic applications electrokinetic and colloid. In solutions of the same ionic strength, the electric mobilities of the same protein at different hydrogen ion activities should be proportional to the number of hydrogen. The 10th international symposium on electrokinetic phenomena. Electrokinetic and colloid transport phenomena jacob h. While this colloidfacilitated transport is largely governed by the electrokinetic properties. Lecture linear electrokinetic phenomena notes by mit student and mzb 1 linear electrokinetic resonse of a nanochannel 0 3 we start with the system in equilibrium q 0 i. Colloid transport in a single fracturematrix system. Theory of colloid and interfacial electric phenomena. Transport of iron oxide colloids in packed quartz sand media.
Electrokinetic phenomena electrokinetic and colloid. Practical rules are recommended for performing electrokinetic measurements and. Comparison of electrokinetic properties of colloidal. The physical explanation of this capillarydriven phenomenon is that. Responding to renewed interest in the subject of electrokinetics, electrokinetic and colloid transport phenomena is a timely overview of the latest research and applications in this field for both the beginner and the professional. Effects of sternlayer conductance on electrokinetic. A new, definitive perspective of electrokinetic and colloid transport processes. A new, definitive perspective of electrokinetic and colloid transport processes responding to renewed interest in the subject of electrokinetics, electrokinetic and. A new theory of geomagnetism involving electrostatic and. Electrokinetic and colloid transport phenomena wiley.
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