Journal
ELECTROCHIMICA ACTA
Volume 48, Issue 20-22, Pages 2967-2974Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0013-4686(03)00362-1
Keywords
statistical field theory; double layer; interfacial structure; surface tension; capacitance
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We use a field theoretical approach to study ionic systems. In this paper we illustrate this formalism in a grand canonical ensemble for the long range Coulomb potential. For the inhomogeneous system near a hard neutral plane wall we go beyond the well known Debye-Huckel electrolyte results and predict the existence of a desorption profile. The results are compared with well established sum rules for ionic systems and thermodynamic relations are verified. We also calculate the differential capacitance in a slab using the linear response theory. The capacitance is calculated from the charge-charge correlations for the neutral system using the fluctuation-dissipation theorem. (C) 2003 Elsevier Ltd. All rights reserved.
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