As for deposition of nanotubes or nanofibers, techniques are described for example in the documents of Sharma S and al.: <<Diameter control of Ti-catalyzed silicon nanowires>>, J. Crystal Growth 2004; 267: pp. 613-618, or Tang H and al.: <<High dispersion and electrocatalytic properties of platinum on well-aligned carbon nanotube arrays>>, Carbon 2004; 42: pp. 191-197.