摘要:
The invention relates to coding products comprising mixed lanthanide compounds, in particular mixed lanthanide oxides. The invention also relates to the use of said coding products for the authentication of value documents.
摘要:
The invention relates to the use of nanoparticles having dimensions between 1 and 50 nm, at least one part of which is constituted of at least one oxide and/or one oxyhydroxide of at least lanthanide, said nanoparticles being: - either constituted of at least one oxide and/or one oxyhydroxide of at least one lanthanide, - or in the form of nanoparticles comprising an oxyhydroxide core of at least one lanthanide, and a coating constituted of a polysiloxane, optionally with organic molecules grafted to the surface or included within it, as a radiosensitizing agent in the manufacture of an injectable composition intended for improving the effectiveness of the treatment of a tumour by X-ray or gamma irradiation. It also relates to nanoparticles that are particularly suitable for the above use, constituted of a core constituted of at least one oxide and/or one oxyhydroxide of at least one lanthanide and of a polysiloxane coating comprising 1 to 5 silicons per lanthanide and of which at least 10% of the silicon atoms are linked to hydrophilic organic molecules having molar masses of less than 450 g/mol.
摘要:
Hybrid nanoparticles including a nanosphere with a mean diameter in the range 2-9 nm, of which at least 90 wt % consists of Ln2O3, 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.
摘要:
The invention relates to a method for producing a single-phase or multiphase powder, optionally in the form of a colloidal suspension of sesquioxide, oxohydroxide, hydroxide or pure rare-earth mixed oxide, while in a mixture or doped, the rare-earth portion representing more than 50 % of the mass of the obtained powder. The invention also relates to essentially spherical powder particles having a mean diameter ranging between 20 and 800 nm and being nanostructured of Ln2O3 and a colloidal suspension.