Zeta Potential

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zeta potential

[′zād·ə pə‚ten·chəl]
The electrical potential that exists across the interface of all solids and liquids. Also known as electrokinetic potential.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Zeta Potential


(also electrokinetic potential), the portion of the total potential drop at an interface between two phases that determines the relative displacement of the two phases in electrokinetic phenomena.

The total potential drop across a phase boundary in disperse systems results from the existence of an electrical double layer. The zeta potential is the potential drop across the diffuse portion of a double layer; within the diffuse portion, a liquid may be displaced tangentially relative to the phase boundary when external influences act on a system. The sign of the zeta potential may be reversed—that is, surface charge reversal may occur—under the influence of ions that are strongly adsorbed on a surface or when the pH of a liquid changes.

The zeta potential at an isoelectric point is equal to zero.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The prepared MWCNT dispersion was characterized by pH, electrical conductivity tests, measurements of zeta potential and particle size analysis.
(ii) Zeta Potential. The surface charge of NV/DNV formulations was assessed by zeta potential measurements by dynamic light scattering under electrophoresis on a Malvern Zetasizer (Nano-ZS: Malvern, Worcestershire, UK) at 25[degrees]C.
Guo, "Effect of diluent type on analysis of zeta potential of colloid particles of soymilk protein," Transactions of the Chinese Society of Agricultural Engineering, vol.
Furthermore, the dispersion homogeneity, rheological properties, and mechanical properties were investigated using zeta potential, reological and mechanical measurements, respectively.
The key parameter for electrokinetic phenomena is the Streaming Potential coupling coefficient and therefore the zeta potential [4].
But if the citrate AuNPs in the zeta cell were replaced by the spare solution that has not been used for measurement before, a good zeta potential can be observed again, that is, zeta potential of second measurement of the 3 hours and measurement after 3 hours.
Zeta potentials of all milk samples as a function of dilution ratio are shown in Figure 8.
Particle and wall zeta potentials corresponding to the electrolyte concentrations considered in this study are listed in Table 1 (Gu and Li, 2000; Kang et al., 2004).
The DLS results and zeta potential measurements both suggest that the compaction efficiency of surfactant increases with the surfactant chain length.
Characterization of Zeta Potentials. On the base of the pH value, the electrokinetics of the particles was measured as zeta potentials.
(1) Zeta potentials of the fluid samples at the same temperature were measured by Zetasizer (Nano ZS90, MALVERN, United Kingdom).
The negative charge of the dispersed clays from these soils, measured as zeta potentials, decreased in the order Na>K>Mg>Ca.