OBJECT AUTHENTICATION METHOD AND USE THEREOF

摘要

The invention relates to a method for authenticating objects, comprising: the production of nanoparticles with a dielectric core and a metal coating, preferably a silica core and a gold coating; the characterisation of the resulting nanoparticles in order to determine different properties; and the use of the nanoparticles in order to authenticate an object. According to the invention, the nanoparticles are added to the object, light having a predetermined wavelength is applied thereto and the presence of the nanoparticles is verified by checking the absorption of said light by the nanoparticles. The method is used to authenticate paper money, documents, fluids such as perfumes, equipment or consumer goods with high added value.