Coating surfaces with nanostructures

A process for coating a surface with nanostructures, comprising:

• providing at least one support part to be coated;
• providing a first deposition on the at least one support part of at least one first substance selected from the group consisting of rhenium, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold, and alloys comprising these, from at least one first compound which provides the at least one first substance, while using in addition a third compound in a same solution as the first compound, the third compound containing metal ions selected from the group consisting of acetates, sulfides, and sulfates of metals of groups IVb, Vb, VIb, IVa, and Va of the Periodic Table, wherein the first deposition is carried out by electrochemical methods, wherein the first deposition includes microstructuring;
• before the first deposition and a second deposition, conditioning the support part by electrochemical methods selected from a group including potentiostatic methods, cyclic voltammetry, and current ramping, in a salt-containing, aqueous solution;
• and
• after the first deposition, providing the second deposition of at least one second substance selected from the group consisting of rhenium, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold, and alloys comprising these, from at least one second compound which provides the at least one second substance, in a solution, wherein the second deposition is carried out by colloid synthesis, wherein the second deposition includes nanostructuring;
• wherein the support part after the second deposition includes a plurality of hemispherical deposits and a plurality of nanotubes on the hemispherical deposits;
• and
• a concentration of the at least one first substance in the first deposition is at least 10 times as high as that of the at least one second substance in the second deposition.