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Front Cover: Dielectric relaxation spectroscopy of aqueous micellar electrolyte solutions: A novel application to infer Dukhin number and zeta potential of a micelle
Author(s) -
Khademi Mahmoud,
Barz Dominik P. J.
Publication year - 2019
Publication title -
electrophoresis
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201970041
Subject(s) - dielectric spectroscopy , micelle , dielectric , relaxation (psychology) , zeta potential , electrolyte , spectroscopy , materials science , aqueous solution , chemical physics , analytical chemistry (journal) , viscosity , chemistry , chromatography , nanotechnology , physics , composite material , optoelectronics , psychology , social psychology , electrode , nanoparticle , electrochemistry , quantum mechanics
DOI: 10.1002/elps.201800293 The cover picture shows the change of the electrical double layer of a suspended micelle over the period of an applied oscillating voltage. Dielectric relaxation spectroscopy (DRS) can be used to measure such changes, expressed as the dielectric loss of the sample. The present paper, for the first time, applies DRS along with an extensive theoretical framework to measure the zeta potential of micelles. In contrast to the conventional measurement methods, DRS is applicable to any sample regardless of its polarity, viscosity, concentration, and turbidity.