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Role of surface states in electrodeposition of Pb on n-Ge by C. Ehlers; U. König; G. Staikov; J.W. Schultze is a Engineering article available to read on EtoBox.

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The influence of surface states on the kinetics of the initial stages of Pb electrodeposition on n-Ge( 111) was studied by cyclic voltammetric and current transient measurements. The substrate surface was modified to n-Ge(111) H or n-Ge(111) OH applying appropriate experimental and polarization routines. In transient experiments, the driving force for nucleation, the supersaturation, was varied by both changing the electrode potential U at c Pb2 + = const and the concentration c Pb2 + at U =const. The results obtained indicate that, under the experimental conditions used, the nucleation site density N 0 remains constant with the electrode potential and thus, does not influence the initial nucleation kinetics. The nucleation rate, the density of nucleation sites and the number of atoms N crit in critical nuclei were obtained analyzing current transients on the basis of models for instantaneous and progressive nucleation. Nucleation kinetics were found to be more inhibited on n-Ge( 111) OH. The experimental results show that the different nucleation behavior of H-and OH-terminated n-Ge( 111) surfaces can be explained by different densities of Ge surface free radicals acting as nuclea

Who reads Role of surface states in electrodeposition of Pb on n-Ge?

Author

C. Ehlers; U. König; G. Staikov; J.W. Schultze

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0013-4686)

Published

2001

Language

EN

Field

Engineering (Physical Sciences)