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- Surface_conductivity abstract "Surface conductivity is an additional conductivity of an electrolyte in the vicinity of charged surfaces. Close to charged surfaces a layer of counter ions of opposite polarity exists which is attracted by the surface charges. This layer of higher ionic concentration is a part of the interfacial double layer. The concentration of the ions in this layer is higher as compared to the volume conductivity far from the charged surface and leads to a higher conductivity of this layer.Smoluchowski was the first to recognize the importance of surface conductivity at the beginning of the 20th century.There is a detailed description of surface conductivity by Lyklema in "Fundamentals of Interface and Colloid Science" The Double Layer (DL) has two regions, according to the well established Gouy-Chapman-Stern model, Ref.2. The upper level, which is in contact with the bulk fluid is the diffuse layer. The inner layer that is in contact with interface is the Stern layer. It is possible that the lateral motion of ions in both parts of the DL contributes to the surface conductivity. The contribution of the Stern layer is less well described. It is often called "additional surface conductivity".The theory of the surface conductivity of the diffuse part of the DL was developed by Bikerman. He derived a simple equation that links surface conductivity κσ with the behaviour of ions at the interface. For symmetrical electrolyte and assuming identical ions diffusion coefficients D+=D-=D it is given in Ref.2:whereF is the Faraday constantT is the absolute temperatureR is the gas constantC is the ionic concentration in the bulk fluidz is the ion valencyζ is the electrokinetic potentialThe parameter m characterizes the contribution of electro-osmosis to the motion of ions within the DL:The Dukhin number is a dimensionless parameter that characterizes the contribution of the surface conductivity to a variety of electrokinetic phenomena, such as, electrophoresis and electroacoustic phenomena.".
- Surface_conductivity thumbnail Surface_Conductivity.svg?width=300.
- Surface_conductivity wikiPageID "13581828".
- Surface_conductivity wikiPageRevisionID "546667477".
- Surface_conductivity hasPhotoCollection Surface_conductivity.
- Surface_conductivity subject Category:Chemical_mixtures.
- Surface_conductivity subject Category:Colloidal_chemistry.
- Surface_conductivity subject Category:Condensed_matter_physics.
- Surface_conductivity subject Category:Matter.
- Surface_conductivity subject Category:Soft_matter.
- Surface_conductivity type Abstraction100002137.
- Surface_conductivity type ChemicalMixtures.
- Surface_conductivity type Matter100020827.
- Surface_conductivity type Mixture114586258.
- Surface_conductivity type Part113809207.
- Surface_conductivity type PhysicalEntity100001930.
- Surface_conductivity type Relation100031921.
- Surface_conductivity type Substance100019613.
- Surface_conductivity comment "Surface conductivity is an additional conductivity of an electrolyte in the vicinity of charged surfaces. Close to charged surfaces a layer of counter ions of opposite polarity exists which is attracted by the surface charges. This layer of higher ionic concentration is a part of the interfacial double layer.".
- Surface_conductivity label "Przewodnictwo powierzchniowe".
- Surface_conductivity label "Surface conductivity".
- Surface_conductivity sameAs Przewodnictwo_powierzchniowe.
- Surface_conductivity sameAs m.03cb19l.
- Surface_conductivity sameAs Q7645963.
- Surface_conductivity sameAs Q7645963.
- Surface_conductivity sameAs Surface_conductivity.
- Surface_conductivity wasDerivedFrom Surface_conductivity?oldid=546667477.
- Surface_conductivity depiction Surface_Conductivity.svg.
- Surface_conductivity isPrimaryTopicOf Surface_conductivity.