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 It might be outdated or ideologically biased.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 ?
Both APA and DAC were found to be effective dispersant agents for 3Y-TZP; the smallest particle size, the small tendency towards sedimentation, and the higher zeta potential became critical values for understanding the stabilization of the suspension, where these values can be achieved with the addition of both APA and DAC at 3.5 wt.%.
In this simulation, the flow field, the applied electric field, and the zeta potential control equation of the wall surface of the polarizable obstacle are shown in (4).
Findings obtained from zeta potential measurements were consistent with those obtained from flotation test.
Caption: FIGURE 5: Zeta potential of LIB spent cathode powder.
The stability of the formulations was assessed periodically at intervals of 0,1, 2, and 4 months in terms of the physical appearance, vesicle size, size distribution, zeta potential, total PR content, and entrapment efficiency.
As shown in Table 2, the size and zeta potential were very similar to the NV/DNVs encapsulating FITC in the prestudy method development.
The presence of acrylic polymer used as a capping agent for AgNPs leads to a higher zeta potential. Based on the zeta potential data, it can be supposed that AgNPs are surrounded by acrylic polymer, thus avoiding the agglomerates.
The D-MWCNTs had a more negative zeta potential than that of the A-MWCNTs.
The absolute value of zeta potential increased in all 10: "The smallest absolute increase was by a factor of 1.27 and the largest was by a factor of 5.63." The person with the smallest increase lived on a raw-food diet, ran three times per week, and did yoga twice a week outdoors and at home.