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AssigneeNanosolutions GmbH
InventorsFernando Ibarra, Christiane Meyer, Stephan Haubold, Thorsten Heidelberg
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The invention relates to synthesis of nanoparticles, in particular to methods for producing nanoparticles with a net-works consisting of Z sulphate (Z=magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) or the binary mixtures thereof). The inventive method consists in synthesising the nanoparticles by crystal growth from an ion Z source and a sulphate ion source in a synthesis liquid phase mixture. The aim of said invention is to produce in a simple way barium sulphate nanoparticles having a small diameter, said particles being uniformly dispersed in water or other solvents. For this purpose, co-ordinating solvents like glycerine, glycol ethylene and other polyethylene glycols, polyalcohols or dimethylsulphoxide (DMSO) are used for the synthesis mixture. In the preferred embodiment, barium is used in the form of chloride and the sulphate source in the form of tetrabutylammonium hydrogen sulphate. Other metallic dopants can be eventually integrated in the nanoparticles network. When the synthesis is also used in the form of chloride.
Nanoparticles having a crystal lattice or, in the case of doping, a host lattice essentially consisting of Z sulphate (Z=magnesium (Mg), calcium (Ca), strontium (Sr) or barium (Ba)), which can be obtained by controlled crystal growth in a non-aqueous solvent with coordinating properties, the nanoparticles having an average particle size of 0.2 to 50 nanometres and the property that they are dispersible in water.
Method for producing nanoparticles having a crystal lattice or, in the case of doping, a host lattice essentially consisting of Z sulphate (Z=calcium (Ca), strontium (Sr) or barium (Ba)), in which the nanoparticles are synthesised by crystal growth from a Z ion source and a sulphate ion source in a liquid phase synthesis mixture, characterised in that the synthesis mixture contains a non-aqueous solvent with coordinating properties which acts as a control component for particle growth.
Production method according to the preceding claim, wherein combinations of the coordinating solvents are used.
Production method according to the preceding claim, wherein dimethyl sulfoxide (DMSO) is used as the solvent for synthesising manganese- and europium (II)-doped Z sulphate nanoparticles and imidazole is added as the base.
Production method according to the preceding claim, wherein most of the solvent of the synthesis mixture has coordinating properties.
Dependencies are inferred from the claim text.