The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 2022
Filed:
May. 18, 2018
Ecole Polytechnique, Palaiseau, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Thierry Gacoin, Bures-sur-Yvette, FR;
Maximilian Richly, Paris, FR;
Pascal Preira, Savigny-sur-Orge, FR;
Antigoni Alexandrou, Palaiseau, FR;
CĂ©dric Bouzigues, Paris, FR;
Rabei Mohammedi, Gif-sur-Yvette, FR;
ECOLE POLYTECHNIQUE, Palaiseau, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
Abstract
The present invention concerns a luminescent particle comprising a nanoparticle of formulaALnVO(PO)  (I)in which A is selected from yttrium (Y), gadolinium (Gd), lanthanum (La), and mixtures thereof; Ln is selected from europium (Eu), dysprosium (Dy), samarium (Sm), neodymium (Nd), erbium (Er), ytterbium (Yb), and mixtures thereof; 0<x<1; and 0≤y<1; characterized in that the nanoparticle on its surface has tetraalkylammonium cations in an amount such that said nanoparticle has a zeta potential, ζ, of less than or equal to −28 mV in an aqueous medium with a pH≥5, more particularly with a pH≥5.5, and with an ionic conductivity >100 μS·cm. It also concerns a method for preparing such luminescent particles, a colloidal suspension of these particles, and the use thereof as a diagnostic agent, and also a diagnostic kit comprising such luminescent particles.