Streaming Potential and Streaming Current Methods for Characterizing Heterogeneous Solid Surfaces

Journal of Colloid and Interface Science
D Erickson, D Li

Abstract

By monitoring changes in electrokinetic parameters, the streaming potential technique has been used as a method of characterizing heterogeneous surfaces, for example, due to protein adsorption. In general it is assumed that the change in the streaming potential is proportional to the degree of heterogeneity. In this study a simple model of the electrokinetic flow through heterogeneous slit channels has been developed with the goal of comparing the streaming potential and streaming current techniques and determining under what conditions the aforementioned proportionality assumption will produce erroneous results. The flow simulations have shown that, when the streaming potential induces significant flow impedance, a severe deviation from the linear assumption is observed. Since streaming current measurements are unaffected by electrokinetic flow effects, more consistent results are predicted and they are preferred for measurements made in small channels. Additionally it has been shown that the distribution of the heterogeneous coverage has a negligible effect on both the streaming potential and the streaming current in cases where the double-layer overlap is not significant. Copyright 2001 Academic Press.

Citations

May 14, 2010·Journal of Colloid and Interface Science·Subhra DattaShuvo Roy
Mar 21, 2007·Journal of Colloid and Interface Science·A V DelgadoUNKNOWN International Union of Pure and Applied Chemistry, Physical and Biophysical Chemistry Division IUPAC Technical Report
Dec 8, 2004·Advances in Colloid and Interface Science·Maria Zembala
Apr 5, 2016·Biosensors & Bioelectronics·Apurba Dev Jan Linnros
Jun 24, 2003·Advances in Colloid and Interface Science·V V BerezkinV D Sobolev
Mar 31, 2007·Physical Chemistry Chemical Physics : PCCP·Jérôme F L DuvalPhilippe De Donato
Jun 12, 2012·Physical Chemistry Chemical Physics : PCCP·Amparo M Gallardo-MorenoM Luisa González-Martín
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Jun 29, 2006·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Edouard Brunet, Armand Ajdari
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Dec 18, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Tanmay GhongeSuman Chakraborty
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Jan 14, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Martin BrücherRoland Hergenröder

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