Preparation of magnetic fluorescent powder and application thereof in fingerprint development

摘要: The invention relates to preparation of a magnetic fluorescent powder and application thereof in fingerprint development. Amino-modified silicon dioxide-coated nanoparticles (Fe3O4@SiO2-NH2)and green glutathione-modified cadmium telluride quantum dot solution (CdTe-GSH-QDs) are respectively prepared, undergo amidation reaction with EDC (1-ethyl-3-(3-dimethyllaminopropyl)carbodiimide hydrochloride) NHS (N-hydroxysuccinimide) as coupling agents, so that the is prepared. According invention, by covalently combining carboxyl-modified dots amino-modified ferroferric oxide together, nanopowder functions prepared; because introduction carboxyl group, can quickly absorb moisture air residues suppress flying dust; sensitivity developing latent increased, expected develop fingerprints on variety objects.