This handbook is aimed to bring together under a single cover all aspects of the electrochemical nanotechnology including electrochemical synthesis of nanostructured materials, electrocatalysis, surfaces and interfaces of nanomaterials, surface functionalization and modification, electrodeposition; corrosion, oxidation/eduction process, electrocehmical etching, nano-ionics, nanoelectrodes; electrochemical sensors based on nanostructured materials, photoelectrochemistry, nanoelectrodes, electrochemical nanotechnology of nanostructured materials such as fullerenes, nanostructured silicons, nanoparticles; conducting polymers; nanowires; carbon nanotubes; arrays, supramolecules, thin films, monolayer, electrochemical self-assemblies, DNA, enzymes, zeolite and porous nanomaterials, nanostructured semiconductors, nanocomposites; alloys, membranes, spectroscopic methods (STM, SEM, AFM, Raman, FTIR etc), computational simulation, electrochemical process and kinetics, electrical, optical and biological properties, applications of nanostructured material in energy devices (fuel cells, battery, supercapacitors, etc.), electrochemical sensors, biosensors, etc., etc. Broadly speaking all aspects dealing with the chemistry, physics, biology and engineering of electrochemical nanotechnology and its applications in all related fields will be covered.