Les nanotechnologies requièrent de réaliser des édifices complexes à l'échelle atomique. Ceux-ci sont généralement réalisées par dépôts sur un substrat (métal ou oxyde).

The Raman microspectrometry is an analytical device of primary importance to characterize the crystalline structure of materials. It is a complementary technique to micro X-ray diffraction. This technique is well suited to characterize and determine the distribution of the phases formed in the corrosion layers of iron or steels during very long periods in various environments. Iron oxides, oxy-hydroxides and carbonates are the main phases encountered in these systems.