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:
Dec. 10, 2024
Filed:
Jul. 04, 2019
Université DE Strasbourg, Strasbourg, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Université Paris Saclay, Saint Aubin, FR;
Hong Kong Baptist University, Kowloon, HK;
Ka-Leung Wong, Kawloon, HK;
Joan Goetz, Strasbourg, FR;
Loïc Charbonniere, Weyersheim, FR;
Niko Hildebrandt, Orsay, FR;
Aline Nonat, Eckbolsheim, FR;
Cyrille Charpentier, Strasbourg, FR;
Marcelina Cardoso Dos Santos, Gif-sur-Yvette, FR;
Vjona Cifliku, Gif-sur-Yvette, FR;
UNIVERSITE DE STRASBOURG, Strasbourg, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
UNIVERSITE PARIS SACLAY, Saint Aubin, FR;
HONG KONG BAPTIST UNIVERSITY, Kowloon, HK;
Abstract
The invention provides luminescent lanthanide nanoparticles having simultaneously an improved brightness and an increased lifetime of the excited-state. These nanoparticles comprise terbium ions and ions of a second lanthanide, preferentially europium, and are coated with molecules of chromophore ligand bonded to the surface of the nanoparticle. The ligand is an organic molecule comprising at least one chromophore radical of formula (I) or of formula (II): wherein R is selected from H, CN group or COOH group. The phosphorescence excited-state lifetime is improved by energy transfer from surface terbium ions to core ions of the second lanthanide. The nanoparticle may further comprise a carrier molecule of analytical interest covalently attached to at least one ligand molecule.