This is the reason that electrophoretic separation of dna or other large molecules is usually done in a gel, rather in free solution. Electrophoresis is the most suitable electrokinetic method to study particulate solids. Micromachines free fulltext electrokinetic phenomena. The discovery of electrokinetic phenomena by reuss in 1808 and further investigations that gave rise to the concept of the electrical double layer have played an important role in the understanding of colloidal stability. The conference is held biannual inside and outside europe. Rtils typically have large organic cations and similar organic or smaller inorganic anions and hold promise as solvent free electrolytes for supercapacitors, batteries, solar. 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. Electrokinetic transport phenomena internet archive. It is a very important interfacial property for a large number of natural phenomena, for example electrode kinetics, electrocatalysis, corrosion, adsorption and colloidal. Electrokinetic phenomena article about electrokinetic. The purpose of this article is to summarize the present position of the theory of electrokinetic phenomena and to present certain new mathematical results i have obtained, the.
Effective medium approximation and exact formulae for. An essential requirement for the observation of electrokinetic phenomena is the formation of an electrochemical double layer at the interface. Electrokinetic effects counter ions charged colloid electrophoresis adsorbed ions. This reference reveals the electrokinetic phenomena that underlie highperformance electrobased analytical tools and vividly depicts how electrodriven analytical tools. Electrokinetic potential is a potential difference at the boundary between the compact layer and the diffuse layer near a solidliquid interface where liquid velocity is zero.
S0305447003377893 effective medium approximation and exact formulae for electrokinetic phenomena in porous media pierre m adler2 and vladimir mityushev1,2 1 dept. Electrokinetic and colloid transport phenomena wiley. Contracts dms0707641 downloadstorey2012effects of electrostatic correlations on electrokinetic phenomena. This potential is known as the electrokinetic potential and may be estimated by observing the mobilities of particles in an electrical field, as in electrophoresis, or the motion of the whole body of liquid, as in electroosmosis. Electrokinetic phenomena result from the differential movement of two phases where the interface is an electrical double layer.
Ac electrokinetic phenomena use electric fields to generate forces that act on fluids or suspended particles including those made of dielectric or biological material and cause them to move in astonishing ways 1, 2. Zeta potential is a scientific term for electrokinetic potential in colloidal dispersions. As surface conductivity occurs both above and below the surface of shear this is a possible probe to obtain information about the properties of the outer and inner. Electrokinetic phenomena principles and applications in analytical chemistry and microchip technology edited byanurag. Electrokinetic phenomena in pencil leadbased microfluidics mdpi.
Within a single channel, ac electrokinetics can accomplish many essential onchip operations such as active micromixing. Request pdf electrokinetic phenomena for membrane charge membrane charge is fundamental to the separation of ions from a membrane and is a major factor in the separation efficiency of. Electrokineticphenomena frank simon leibnizinstitut. Electrokinetic phenomena emphasizes the impact of methods such as capillary zone electrophoresis, capillary electrochromatography, and capillary gel electrophoresis on the analysis of biomolecules. Manual of symbols and terminology for physicochemical uantities and units, appendix ii. Electrokinetic phenomena are a family of effects in which a liquid moves tangentially to a charged surface.
Extensions of the classical electrokinetic theory are also required for roomtemperature ionic liquids rtils. Electrokinetic phenomena chapter 7 colloidal dispersions. Electrokinetic phenomena in organic solvents the journal. A solventfree microbialactivated air cathode battery paper. The leaky film induces electrokinetic phenomena to enhance li. Electrokinetic phenomena electrokinetic phenomena abramson, harold a. Particles can be solid, liquid or gas bubbles with sizes on the scale of a micrometer or nanometer. An essential reference book for any professional seeking information regarding particular aspects of electrokinetic transport phenomena, electrokinetic and colloid transport phenomena provides a single and comprehensive reference on the subject, including an up to date summary of the literature.
Electrokinetic phenomena synonyms, electrokinetic phenomena pronunciation, electrokinetic phenomena translation, english dictionary definition of electrokinetic phenomena. Zeta potential the shear plane slipping plane is an imaginary surface separating the thin layer of liquid bound to the solid surface and showing elastic behavior. Electrokinetic and colloid transport phenomena surface. Electrokinetic phenomena, as zeta potential and specific amount of surface charge, characterize electric charge of textile material. The region containing the double layered is sheared at some distance from the solid surface creating a thin film associated with the solid. Efficient electrokinetic phenomena provided by the 3d. Electrokinetic definition is of or relating to the motion of particles or liquids that results from or produces a difference of electric potential. 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. They are manifestations of the electrical properties of interfaces under steadystate and isothermal conditions. Although electrokinetics is and remains the central theme of the meetings, the emphasis may change from.
Electrokinetic phenomena of various kinds contain often a component of surface conductivity which becomes relatively more prominent when the electrolyte content is relatively low. Electrokinetic processes derive from interactions between macroscopic motion and diffuse electric charge. In addition, there are analogous phenomena for freely suspended charged colloidal particles, such as electrophoresis and sedimentation potential see sections 3. Electrokinetic phenomena in pencil leadbased microfluidics. Pdf inducedcharge electrokinetic phenomena researchgate. 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. Fabrication of microchannels and associated electrodes to generate electrokinetic phenomena often involves costly materials and considerable effort. Nanopores and mesopores with welldefined geometry and chemical characteristics have been a valuable tool to unravel electrochemical properties of interfaces, but the majority of studies have been focused on aqueous solutions. Electrokinetic phenomena and their application to biology and medicine. In practice, they are often the only source of infor.
Electrokinetic phenomena and their application to biology. Electrokinetic and colloid transport phenomena ebook. In this study, we used graphite pencilleads as low cost, disposable 3d electrodes to investigate various electrokinetic phenomena in straight cylindrical microchannels, which were themselves fabricated by using a graphite rod as the microchannel. The electrokinetic phenomena were characterized by microparticle image. The effects of microstructure of fluid particles on the electrokinetic phenomena are investigated analytically based on a micropolar fluid model, where microrotation of fluid particles and material parameters like viscosity and angular viscosity coefficients are involved. Solidliquid interfaces play a key role in separation processes, energy storage devices, and transport in nanoscale systems.
Measurement and interpretation of electrokinetic phenomena. The elkin is a forum for the discussion of new advances in theoretical and applied electrokinetics. Electrokinetic transport phenomena by masliyah, jacob heskel, 1942. Nonlinear electrokinetic phenomena are electrically driven fluid flows or particle. Electrokinetic definition of electrokinetic by merriam. Pdf this chapter provides an introduction to a certain class of nonlinear electrokinetic phenomena, where the applied electric field acts on. Although electrokinetics is and remains the central theme of the meetings, the emphasis may.
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 definition of electrokinetic by the free. Analytical investigation of electrokinetic effects of. Electrokinetic phenomena for membrane charge request pdf. 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. Ppt electrokinetic phenomena powerpoint presentation. In the colloidal chemistry literature, it is usually denoted using the greek letter zeta. Applications of electrokinetic phenomena in materials. Electrokinetic phenomena an overview sciencedirect topics. 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. The electrokinetic phenomena often accompany one another, e.
Wellknown phenomena of this kind are electrophoresis. In prior literature, it is usually denoted using the greek letter zeta. The history of electrokinetic phenomena sciencedirect. The purpose of this article is to summarize the present position of the theory of electrokinetic phenomena and to present certain new mathematical results i have obtained, the details of which. Iceo, the nonlinear electrokinetic slip at a polarizable surface, in the context of some new techniques for microfluidic pumping and mixing. Interface phenomena of ecologically scoured cotton material tadalafil can be determined in biological samples, dietary supplements, or herbal matrices by liquid chromatographytandem mass spectrometry with.
The effect of human and rabbit sera on the cataphoretic mobility of glass and quartz particles, and of paraffin oil droplets, was studied in serum dilutions with 0. Journal of colloid and interface science 309 2007 194224 1. Electro kinetic phenomena electroosmosis electrophoresis gel electrophoresis, polymer dynamics in gels. Measurement and interpretation of electrokinetic phenomena damtp.
An outgrowth of an earlier text by coauthor jacob masliyah, this selfcontained. From a theoretical viewpoint, the zeta potential is the electric potential in the interfacial double layer dl at the location of the. Ac electrokinetic phenomena generated by microelectrode. Welcome to the web page of the international symposium on electrokinetic phenomena.
Alberta oil sands technology and research authority. This method is based on the fact that charged suspended particles. Effects of electrostatic correlations on electrokinetic. A new, definitive perspective of electrokinetic and colloid transport processes. Responding to renewed interest in the subject of electrokinetics.
617 274 141 430 1128 848 1128 779 812 919 13 960 700 296 822 669 1140 1391 183 55 903 117 1136 1299 1223 1088 35 1229 922 507 1406 630 1320 415 843 661 1252 213 935 628 356 140 1365 542