Colloidal and Interface Science
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Electrostatic Interactions ) exp( 1 h B E e ) 4 ( tanh 8 2 2 1 T k ez l z T ak B b s b b =1/ D λ D is Debye-Hückel length s D n nm / 305 . 0 n s is the ionic strength in mol/L The Bjerrum length, l b = e 2 /4πε 0 ε r k b T Ψ s :surface potential z : the charge of the solvated ion Two spherical particles of the same size separated by a distance, h (the shortest distance between two spherical particles, each having a radius of a and a center-to-center distance of r, where h = r-2a) Effect of Charge Screening: Effect of Surface Charges: Higher h, lower E e Lower Ψ s , lower E e
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Colloidal and Interface Science
Transcript of Colloidal and Interface Science
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Electrostatic Interactionsk =1/lDD is Debye-Hckel lengthns is the ionic strength in mol/LThe Bjerrum length, lb = e2/40rkbTs :surface potential z : the charge of the solvated ionTwo spherical particles of the same size separated by a distance, h (the shortest distance between two spherical particles, each having a radius of a and a center-to-center distance of r, where h = r-2a)Effect of Charge Screening: Effect of Surface Charges: Higher k h, lower Ee Lower s , lower Ee
