Influence of self-affine roughness on Parsons-Zobel plots for electrical double layers

Abstract

In this paper we investigate the dependence of Parsons-Zobel plots on characteristic self-affine roughness parameters of the metal electrode in electrical double layers. Among the roughness amplitude [Formula presented], the correlation length [Formula presented], and roughness exponent [Formula presented], the latter appears to have the most prominent effect especially for values in the range [Formula presented]. In addition, with decreasing compact layer thickness the influence of roughness leads to stronger nonlinear behavior of the plots for relatively large electrode potentials. Finally, it is shown that dynamic changes of the electrode roughness (for example by growth on metal films) should be carefully quantified with respect to their influence on the Parson-Zobel plots and related double-layer systems. © 2004 The American Physical Society.