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PartIV

Electrochemical Nanotechnology

In-situ Local Probe Techniques at Electrochemical Interfaces Edited by W. J. Lorenz and W. Plieth © WILEY-VCH Verlag GmbH, 1998

Nucleation and growth at metal electrode surfaces

Contents

Summary. Time-resolved, atomic-scale, in-situ STM studies of phase formation at metal electrode surfaces are described. Examples include structural phase transitions within the electrode surface layer and in anionic or metallic adsórbate layers as well as metal deposition and dissolution processes.

1 Introduction

The formation of two- and three-dimensional phases on electrode surfaces is a topic of central importance in interfacial electrochemistry. It is of relevance not only to fundamental problems, such as the formation of ionic and molecular adsórbate films, but also to areas of great technological interest, such as thin-film deposition, self-assembly of monolayers, and passivation. So far, phase formation in electrochemical systems has been studied predominantly by kinetic measurements using electrochemical or spectroscopic techniques. In order to understand and control these processes as well as the resulting interface structure better, however, improved

1 Introduction

2 Structural transitions of the electrode surface

3 Phase transitions in adsórbate layers

4 Metal deposition

5 Dynamic metal deposition/dissolution equilibrium

6 Outlook and conclusions

7 References

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