This book will be helpful for all readers interested in electrochemistry and its applications in various fields of science and technology. The aim is to present to the reader a comprehensive and contemporary description of electrochemica nanotechnology. Several chapters are dedicated to the electrochemical creation of nanostructured surfaces or nanomaterials. This includes recent developments in the fields of semiconductor porosification, deposition into templates, electrodeposition of multilayers and superlattices, as well as self-organized growth of transition metal oxide nanotubes.