Hybrid nanoparticles including an ln2o3 core and having...

Details Hybrid nanoparticles including an ln2o3 core and having... Hybrid nanoparticles including an ln2o3 core and having...

G - Physics

01

N

G01N 33/58 (2006.01) G01N 33/52 (2006.01) G01N 33/533 (2006.01) G01N 33/553 (2006.01)

Patent

CA 2558033

Hybrid nanoparticles including a nanosphere with a mean diameter in the range 2-9 nm, of which at least 90 wt % consists of Ln¿2?O¿3?, where Ln is a rare earth optionally doped with a rare earth or an actinide, or a mixture of rare earths, or else a rare earth/actinide mixture in which at least 50 % of the metal ions are rare-earth ions; a coating around the nanosphere, of which a major part consists of a functionalised polysiloxane, and which has a mean thickness in the range 0.5-10 nm, preferably more than 2 nm but no more than 10 nm; and at least one bioligand grafted by a covalent bond to the polysiloxane coating; and a method for preparing same.

L'invention concerne des nanoparticules hybrides comprenant: - une nanosphère, de diamètre moyen compris dans la gamme allant de 2 à 9 nm, composée, à au moins 90% en poids, de Ln2O3 avec Ln qui représente une terre rare, éventuellement dopée avec une terre rare ou un actinide, ou un mélange de terres rares, ou bien un mélange de terre rare et d~actinide dans lequel au moins 50% des ions métalliques sont des ions terre rare, - un enrobage autour de la nanosphère, constitué majoritairement de polysiloxane fonctionnalisé, et qui présente une épaisseur moyenne comprise dans la gamme allant de 0,5 à 10 nm et, de préférence, supérieure à 2 nm et inférieure ou égale à 10 nm, et - au moins un ligand biologique greffé par liaison covalente à l~enrobage de polysiloxane, ainsi que leur procédé de préparation.

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