Title :
Impedance spectroscopy analysis in a complex system: Sodium dodecyl sulfate solutions
Author :
Neto, J.M.G. ; Cunha, H. N da ; Neto, J.M.M. ; Ferreira, G.F.Leal
Author_Institution :
Dept. de Fisica, Universidade Federal do Piaui, Teresina, Brazil
Abstract :
Impedance measurements in the range 10-107 Hz were carried out in solutions of sodium dodecyl sulfate for concentrations below and above cmc. The results were analysed using two series Voigt units, describing bulk and interface process and, additionally, an unexpected inductive one, problably due to inertial effects of an adsorbed layer of SDS molecules at the electrode. The interface processes show a transition at a concentration somewhat below cmc.
Keywords :
adsorbed layers; electrodes; interface phenomena; organic compounds; surfactants; 10 to 107 Hz; adsorbed layer; electrode; impedance spectroscopy; inertial effects; interface process; sodium dodecyl sulfate solutions; Aggregates; Dielectric measurements; Electrochemical impedance spectroscopy; Electrodes; Frequency measurement; Impedance measurement; Platinum; Surface impedance; Temperature distribution; Zirconium;
Conference_Titel :
Electrets, 2005. ISE-12. 2005 12th International Symposium on
Print_ISBN :
0-7803-9116-0
DOI :
10.1109/ISE.2005.1612376
