Importance

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Abstract

It is described a silica nanoparticle comprising: a) a silicate network core with a diameter in a range from 10 nm to 500 nm, preferably from 20 nm to 250 nm, wherein at least a luminophore (dye) is confined in the said silicate network core, or covalently linked to the silicate network of the core because said luminophore (dye) has an anchoring moiety able to form at least a covalent link with the silicate network core, b) a shell layer over the silicate network core a) incorporating dye/s, said shell layer b) with a thickness from 0.5 to 7 nm, preferably from 0.5 to 6 nm, more preferably from 1 to 5 nm, comprising colloidal stabilizer agent/s, selected from the group comprising: sterical or electrostatic antifouling agents or polyether antifouling agents.

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First Claim