FIELD: nanotechnologies.
SUBSTANCE: invention is related to the field of securities and documents protection. Method for protection of documents, securities and products with the help of diamond nanocrystals with active NV center consists in the fact that in protected document, security or product, make that is fluorescent under action of external radiation is introduced or applied, which represents diamond nanocrystal with active NV center.
EFFECT: diamond nanocrystal provides for complete internal reflection and increases fluorescence yield and reduces amount of required material in mark.
2 cl, 2 dwg
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