IUPAC > Gold Book > alphabetical index > T > thickness of electrical double layer
icon

IndexesDownload


thickness of electrical double layer

The length characterizing the decrease with distance of the potential in the double layer = characteristic Debye length in the corresponding electrolyte solution = κ −1:
1 κ = ɛ r ɛ 0 R T F 2 ∑ i c i z i 2
(rationalized four-quantity system)
1 κ = ɛ r R T 4 π F 2 ∑ i c i z i 2
(three-quantity electrostatic system)
where ɛ = static permittivity = ɛ r ɛ 0, ɛ r = relative static permittivity of solution; ɛ 0 = permittivity of vacuum, R = gas constant, T = thermodynamic temperature, F = Faraday constant, c i = concentration of species i, z i = ionic charge on species i.
Source:
PAC, 1972, 31, 577 (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 619
Interactive Link Maps
First LevelSecond LevelThird Level
GraphGraphGraph
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.T06343.
Original PDF version: http://www.iupac.org/goldbook/T06343.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
Current PDF version | Version for print | History of this term
picture