RARE EARTH NANORODS

A process for the production of nanorods containing a rare earth metal is disclosed. The process comprises the steps of: (a) increasing the pH of an aqueous solution of the formula MX3, where M is a trivalent rare earth metal cation and X is a monovalent anion so as to produce a reaction product con...

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Bibliographische Detailangaben
1. Verfasser:	ROBINSON, JOHN, SYDNEY
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS CRYSTAL GROWTH INORGANIC CHEMISTRY MANUFACTURE OR TREATMENT THEREOF METALLURGY NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS,MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES ASDISCRETE UNITS NANOTECHNOLOGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH THEIR RELEVANT APPARATUS TRANSPORTING UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
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Beschreibung
Zusammenfassung:	A process for the production of nanorods containing a rare earth metal is disclosed. The process comprises the steps of: (a) increasing the pH of an aqueous solution of the formula MX3, where M is a trivalent rare earth metal cation and X is a monovalent anion so as to produce a reaction product containing X anions in solution and a precipitate in the form of trivalent rare earth hydroxide nanoparticles of the formula M(OH)3, the nanoparticles having a hexagonal crystal structure; and, (b) ageing the nanoparticles of step (a) in the presence of the reaction product containing X anions in solution so as to cause rod-like anisotropic growth of the nanoparticles and form rare earth hydroxide nanorods. L'invention concerne un procédé pour la production de nanobâtonnets contenant un métal des terres rares. Le procédé comprend les étapes consistant à : (a) augmenter le pH d'une solution aqueuse d'un composé de formule MX3, où M est un cation trivalent d'un métal des terres rares et X est un anion monovalent, afin de produire un produit de réaction contenant des anions X en solution et un précipité sous la forme de nanoparticules d'hydroxyde du métal des terres rares trivalent de formule M(OH)3, les nanoparticules ayant une structure cristalline hexagonale ; et (b) faire vieillir les nanoparticules de l'étape (a) en présence du produit de réaction contenant les anions X en solution afin de provoquer la croissance anisotrope ressemblant à un bâtonnet des nanoparticules et de former des nanobâtonnets d'hydroxyde du métal des terres rares.