Patent ID: 8722095

Claim:
A process for preparing nanoparticles comprising a fluorescent organic nanocrystal core coated with an inorganic shell, said process comprising the following steps: (i) nebulizing a homogenous sol-gel mixture that is obtained via a process comprising the addition of at least one organic solvent, in the presence of water, of at least one fluorescent organic compound and of at least one metal alkoxide of formula (I) below: R 1 x M(OR 2 ) y Formula (I) in which: M is a metal chosen from the group comprising Si, Ti, Zr, Sn, B, Al and Y; x is an integer ranging from 0 to 2; y is an integer ranging from 1 to 6; R 1 and R 2 independently represent an organic radical that is compatible with sol-gel chemistry; (ii) drying the nebulized homogenous sol-gel mixture by evaporating off the solvent and the water present in the homogenous sol-gel mixture.