Abstract:
A method of preparing metal chalcogenides from elemental metal or metal compounds has the following steps: providing at least one elemental metal or metal compound; providing at least one element from periodic table groups 13-15; providing at least one chalcogen; and combining and heating the chalcogen, the group 13-15 element and the metal at sufficient time and temperature to form a metal chalcogenide. A method of functionalizing the surface of semiconducting nanoparticles has the following steps: providing at least one metad compound; providing one chalcogenide having a cation selected from the group 13-15 (B, Al, Ga, In, Si, Ge, Sn, Pb, P, As, Sb and Bi); dissolving the chalcogenide in a first solution; dissolving the metal compound in a second solution; providing and dissolving a functional capping agent in at least one of the solutions of the metal compounds and chalcogenide; combining all solutions; and maintaining the combined solution at a proper temperature for an appropriate time.
Abstract:
Composite particle comprising a zinc containing compound such as zinc oxide and a noble metal such a platinum, and process for fabrication thereof. The particles facilitate simultaneous controlled introduction of the zinc and noble metal species into a nuclear reactor.
Abstract:
A method for synthesis of high quality colloidal nanoparticles using comprises a high heating rate process. Irradiation of single mode, high power, microwave is a particularly well suited technique to realize high quality semiconductor nanoparticles. The use of microwave radiation effectively automates the synthesis, and more importantly, permits the use of a continuous flow microwave reactor for commercial preparation of the high quality colloidal nanoparticles.
Abstract:
The invention relates to a method for producing lithium metal oxides, comprising at least one annealing stage. The inventive method is characterized in that at least one annealing stage consists of a treatment with microwave energy.
Abstract:
A new, facile, general one-phase method of generating thio-functionalized transition metal nanoparticles and surfaces modified by (co)polymers synthesized by the RAFT method is described. The method includes the stops of forming a (co)polymer in aqueous solution using the RAFT methodology, forming a colloidal transition metal precursor solution from an appropriate transition metal; adding the metal precursor solution or surface to the (co)polymer solution, adding a reducing agent into the solution to reduce the metal colloid in situ to produce the stabilized nanoparticles or surface, and isolating the stabilized nanoparticles or surface in a manner such that aggregation is minimized. The functionalized surfaces generated using these methods can further undergo planar surface modifications, such as functionalization with a variety of different chemical groups, expanding their utility and application.
Abstract:
The present invention concerns a process for dissolving ruthenium deposits that are present on a surface and a process for decontaminating the internal circuits of nuclear fuel reprocessing plants using the said dissolution process. The process according to the invention comprises bringing the said surface into contact with an aqueous solution of perruthenate, with the said aqueous solution having a pH equal to or greater than 12, so that the ruthenium is oxidised.
Abstract:
The specification describes novel rhodium sulfate complex solutions which have a minimum of metal to metal complexing and are mostly complexed through the sulfate groups. Use of these solutions as electrolytes for plating rhodium results in electroplated layers with improved brightness and reduced stress.
Abstract:
This invention relates to a process for producing metal oxide precipitates, which comprises making a fluoride ion-capturing agent exist in a mixed solution of (1) an aqueous solution or hydrofluoric acid solution containing a fluoro complex compound and/or a metal fluoride each having a rare earth metal and/or an alkaline earth metal atom(s) M.sup.1 ; and (2) an aqueous solution or hydrofluoric acid solution containing a metal fluoro complex compound and/or a metal fluoride each having a transition metal and/or a 3B group metal atom(s) M.sup.2 to form precipitates comprising a perovskite type complex oxide containing M.sup.1 and M.sup.2, and is suitable for producing precipitates of a perovskite type complex oxide, particularly precipitates such as a thin film or the like on the surface of a substrate which has a large area or complicated shape, by using a simple apparatus without requirement of a heating step for crystallization.
Abstract:
A process for the recovery of rhodium from aqueous solutions of complexes thereof wherein the solutions are treated with oxygen in the presence of a water soluble salt of a carboxylic acid and, in a second stage, further treated with a hypochlorite, whereby oil soluble rhodium compounds are formed which can readily be separated from the aqueous solution.