29results about "Gold compounds" patented technology

The present invention relates to a nanoparticle system comprising a metal selected from silver and gold, coated with polyethylene glycol (PEG) and functionalised with a polyphenol organic acid selected from caffeic acid, gallic acid and ferulic acid. The present invention also relates to a method for manufacturing said nanoparticle system and to the therapeutic and cosmetic use of said nanoparticle system.

The invention relates to an organic germanium-tungsten wheel cluster material, which has a chemical formula of Na16H26 [W36Ge6 (CH2CH2COOH) 6O138]. 82H2O, and belongs to a triclinic system. The organic germanium-tungsten wheel cluster material is prepared from dicarboxyethyl germanium trioxide and sodium tungstate in an acetic acid-sodium acetate buffer solution through a one-step self-assembly reaction, the operation is simple, and the cost is relatively low. In order to further improve the performance of the organic germanium-tungsten wheel cluster material, the organic germanium-tungsten wheel cluster material is compounded with gold nanoparticles and hyaluronic acid to obtain a composite material capable of effectively prolonging the cycle time and enhancing the photo-thermal performance and catalytic toxic active oxygen. The composite material has an excellent treatment effect when being used as a photothermal agent for tumor treatment.

A method of fabricating plasmonic gold prism arrays for digital surface enhanced Raman spectroscopy, a plasmonic gold prism array arranged on a substrate for digital surface enhanced Raman spectroscopy, and a method of using a plasmonic gold prism array that is arranged on a substrate for digital surface enhanced Raman spectroscopy are disclosed. The method of fabricating plasmonic gold prism arrays for digital surface enhanced Raman spectroscopy includes depositing more than one layers of chromium and gold onto a plasmonic substrate comprising a monolayer of polystyrene beads and removing the monolayer of polystyrene beads under sonication in ethanol.

Provided are: a gold plating method for achieving soft gold plating; a composition for gold plating; and a plating solution. The gold plating method is performed using a plating solution comprising: a gold sulfite salt; and at least one among thiosulfate ions and trithionic acid ions.

The present invention patent application relates to a dressing (1) pertaining to the technical field of medical-use materials; said dressing (1) comprises a textile material body (2) and a medicinally functional element (3) incorporated into the textile material body (2), consisting of copper and / or gold (AuNPs) and / or zinc and / or zinc oxide and / or titanium dioxide and / or silver nanoparticles.

The present application is a semiconductor nanoparticle composed of a semiconductor crystal containing a compound of Ag, Au, and S as essential constituent elements. In the AgAuS compound constituting the semiconductor nanoparticle, the total content of Ag, Au, and S is 95% by mass or more. In addition, the compound is preferably an AgAuS ternary compound represented by the general formula Ag (nx) Au (ny) S (nz) . In the general formula, n is an arbitrary positive integer. x, y, z represent the proportion of the number of atoms of each atom of Ag, Au, and S in the compound, and are real numbers satisfying 0 < x, y, z ≤ 1. In addition, x / y is 1 / 7 or more and 7 or less.

The invention discloses a near-infrared light-emitting AgAuSe quantum dot and a room-temperature macro preparation method thereof, and belongs to the technical field of inorganic semiconductor material preparation. The method comprises the following steps: dissolving a silver source in a mixed solution of aliphatic amine and an organic solvent to obtain a silver precursor; dissolving a selenium source in a mixed solution of aliphatic amine and alkyl mercaptan to obtain a selenium precursor; a gold source is dispersed in an organic solvent to obtain a gold precursor. And mixing the three components, stirring for reaction, and centrifuging. The method is easy and convenient to operate, high temperature and inert gas protection are not needed, toxic phosphine-containing reagents are not used, the near-infrared light-emitting AgAuSe quantum dots with excellent fluorescence performance, high photo-thermal stability and good biocompatibility can be rapidly synthesized at the room temperature in a macro-quantity mode through a one-step method, the absolute fluorescence quantum yield can exceed 90%, and the near-infrared light-emitting AgAuSe quantum dots can be widely used. Wide application prospects are realized in the fields of biological imaging and near-infrared photoelectric devices.

The invention is directed to a composition of metal particles and methods of manufacturing and using the composition in the treatment of microbial infections and cancer. The particles can be nanoparticles having coupled thereto at least one of a surfactant, an antibiotic, and a drug. The particles of the invention achieve enhanced stability, enhanced cytotoxicity, and enhanced antimicrobial activity through novel combinations of metals, surfactants, antibiotics, and drugs.

The present invention addresses the problem of providing a highly safe method for producing a gold sulfite via the production of fulminating gold as an intermediate. According to the present invention, a production method includes a step for dissolving a gold starting material in acid to obtain a gold acid solution, a step for adding ammonia water to the gold acid solution to precipitate fulminating gold, a step for washing the fulminating gold with pure water and an alkaline aqueous solution, and a step for adding a metal sulfite to the washed fulminating gold to obtain a gold sulfite solution.

The invention relates to a thiourea-bithiophene bifunctional zirconium-based MOF adsorbent as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and water pollution treatment. According to the preparation method, 4-carboxyl phenyl thiourea and [2, 2-bithiophene]-5, 5-dicarboxaldehyde are taken as ligand raw materials, the ligand raw materials and zirconium tetrachloride are synthesized into the Zr-MOF adsorbent with thiourea-bithiophene bifunctional sites through a solvothermal method, the Zr-MOF adsorbent is recorded as Zr-THBD, and the structural formula of the Zr-THBD is shown in the specification. The thiourea-bithiophene bifunctional zirconium-based MOF adsorbent can be used for efficiently and selectively recovering gold ions (Au (III)) from acidic complex wastewater, and the adsorbent has excellent adsorption capacity and high cyclic regeneration capacity.

The invention is directed to a composition of metal particles and methods of manufacturing and using the composition in the treatment of microbial infections and cancer. The particles can be nanoparticles having coupled thereto at least one of a surfactant, an antibiotic, and a drug. The particles of the invention achieve enhanced stability, enhanced cytotoxicity, and enhanced antimicrobial activity through novel combinations of metals, surfactants, antibiotics, and drugs.

A new colorimetric detection method for sulfur-containing pesticides with nano-mimetic enzyme is provided. The synthesized gold-silver bimetallic nanocluster (Au—Ag NCs) has quasi-peroxidase activity and catalyze hydrogen peroxide to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to form blue products under acidic conditions. Based on the electrostatic interaction between Au—Ag NCs and four sulfur-containing pesticides, the exposed Au and Ag elements further combine with S in pesticide molecules to form bonds, and Au—Ag NCs loses the quasi-peroxidase activity and blocks the catalytic oxidation process.

The invention belongs to the technical field of precious metal compound preparation, and particularly relates to a method for preparing cyanide-free gold plating solution gold sodium sulfite. A mixed solution of sodium sulfite and sodium chloride is used as anolyte, a sodium hydroxide solution is used as catholyte, and sodium sulfite in the anolyte is used as a complexing agent of gold ions and cooperates with sodium chloride to promote anode dissolution. According to the method, the toxicity risk of a traditional cyanide method is avoided, the reaction condition is mild, the product purity is high, no nitric oxide is generated in the process, no dangerous thanic acid gold intermediate is generated in the process, chloride ions can be effectively reduced, and a green and environment-friendly product can be produced.

The invention relates to metal nanoparticles which comprise a metal and a capping agent coordinated to the metal, wherein the capping agent is a salt of a cationic compound capable of absorbing visible light. It also relates to semiconductor metal oxide nanoparticles which comprise the metal nanoparticles, to a functionalised material comprising the semiconductor metal oxide nanoparticles, and to a photocatalytic paint which comprises either the semiconductor metal oxide nanoparticles or the functionalised material. The invention also relates to processes for the preparation of all these materials, and to the use of the semiconductor metal oxide nanoparticles or the functionalised material comprising them as biocides; particularly for the treatment or prevention of a viral disease or a bacterial infection; for removing Volatile Organic Compounds (VOCs) from of air and water supplies, and as a photocatalyst for water splitting.

The present invention relates to nanoparticles (NPs) of the present invention, their compositions, and their use as therapeutic and / or imaging agents, particularly in the field of oncology. The NPs are composed of first nanoparticles of at least one high-Z metal oxide material, to which smaller second nanoparticles are covalently attached at the surface of the first nanoparticles. The second nanoparticles are composed of a) at least one noble metal or at least one metal oxide, metal sulfide, metal selenide, or metal sulfide / selenide that is a Fenton or Fenton-like reaction catalyst. The NPs of the present invention produce surprising therapeutic effects when exposed to ionizing radiation, such as X-rays, gamma rays, protons, neutrons, radioisotopes, and / or electron beams. Thus, the NPs can be used as radiation-enhancing agents in the field of oncology. The nanoparticles can also be used as contrast agents.

A method for assembling building blocks into supraparticles is disclosed, comprising: applying a first solvent onto a template of patterned recessed regions to wet the surfaces of the recessed regions; applying a second solvent onto the template of patterned recessed regions, wherein the building blocks are suspended in the second solvent; wherein the first and second solvents are incompletely miscible such that the interfacial surface tension between the first and second solvents is negligible; and wherein droplets of the second solvent spread droplets of the first solvent within the recessed regions, thereby assembling the building blocks into supraparticles within the recessed regions.

The invention relates to a method for concentrating of colloidal solutions of noble metals, comprising adding a compound based on a cross-linked polymer with 3D structure in the form of hydrogel to a colloidal solution of a noble metal.

A method for modifying a material through rapid surface grafting, and a use thereof are provided. In the method, with an olefin-functionalized nanomaterial as a model matrix, a cycloolefin as a polymerization monomer, a Grubbs catalyst as an initiator, and ethyl vinyl ether as a terminator, surface olefin cross-metathesis is conducted to prepare a polyolefin-grafted nanomaterial. In the use, with a thermoplastic resin as a matrix and the surface-polyolefin-grafted nanomaterial as a reinforcing material, a composite is prepared. The compatibility between the reinforcing material and the thermoplastic resin matrix is evaluated through cross-sectional morphology and mechanical performance characterization. A chain-transfer reaction is adopted as an alternative approach for surface-initiated ring-opening metathesis polymerization to avoid the growth of polymer chains from the surface. This alternative approach can significantly improve a reaction rate, shorten a reaction time, and simplify a technical flow, and demonstrates a promising industrialization prospect.

To provide a semiconductor nanoparticle having suitable photo-semiconductor characteristics and excellent durability in which damage and characteristic change due to hydrophilization treatment are suppressed.SOLUTION: The present invention relates to a semiconductor nanoparticle comprising a multi-element AgAu chalcogen compound containing Ag, Au, a chalcogen element, a metal M1 and a metal M2. The chalcogen element of the AgAu chalcogen compound is at least one of S, Se, and Te, the metal M1 is at least one of In, Al, Ga, Tl, Cd, Hg, and Cu, and the metal M2 is Z n. The metal M1 contributes to the improvement of the optical semiconductor characteristics of the AgAu chalcogen compound, and the metal M2, Zn, has the effect of improving the durability against the hydrophilization treatment. The semiconductor nanoparticle according to the present invention may have a double shell structure having an AgAu chalcogen compound as a core and first and second shells containing a metal M1 and a metal M2, respectively.SELECTED DRAWING: Figure 7

The present invention relates to semiconductor nanoparticles comprising a multicomponent AgAu chalcogen compound containing Ag, Au, a chalcogen element, a metal M1, and a metal M2. The chalcogen element of the AgAu chalcogen compound is at least one of S, Se, and Te, the metal M1 is at least one of In, Al, Ga, Tl, Cd, Hg, and Cu, and the metal M2 is Zn. The metal M1 contributes to improvement of optical semiconductor characteristics of the AgAu chalcogen compound, and Zn, which is the metal M2, has an effect of improving durability to hydrophilization treatment. The semiconductor nanoparticles according to the present invention may each have a double-shell structure having the AgAu chalcogen compound serving as a core, and first and second shells containing the metal M1 and the metal M2, respectively. These semiconductor nanoparticles have suitable optical semiconductor characteristics and durability, and are suppressed in damage and characteristic change during the hydrophilization treatment.

The invention relates to an aqueous solution of AuCl3×2H2O or HAuCl4×4H2O, ZnCl2 or ZnSO4, and AgNO3 having an Au3+ concentration of 0.8 mM-1.6 mM, a Zn2+ concentration of 15 μM-50 μM, and an Ag+ concentration of 5 μM-50 μM. The invention extends to a kit comprising a solution of the invention, a method of preparing said solution, and the use of a solution of the invention, a solution prepared by a method of the invention, or a kit of the invention in predicting and / or diagnosing and / or monitoring a neurocognitive disorder of the Alzheimer's disease spectrum. The invention extends to a method for predicting and / or diagnosing and / or monitoring a neurocognitive disorder of the Alzheimer's disease spectrum in a patient comprising contacting a tear sample from the patient normalised for protein concentration with a solution of the invention; applying an amount of the tear sample thus obtained to a surface; allowing the tear sample to dry; and drawing a conclusion based on the pattern of the thus obtained dried tear sample, whether the patient is at risk of or suffers from a neurocognitive disorder of the Alzheimer's disease spectrum.

The synthesis of several functionalized particles without the need of additional delivery agents are made possible with unique bottom-up reactions. For example, the synthesis of gold nanoparticles from 300nm–6000nm in diameter are optimized size for use in biolistic delivery. A catalytic reaction in a simple aqueous phase can be carried out at room temperature (between 20°C and 24°C). A catalyst enables production of spherical particles of desirable size and narrow size distribution. Surface functionalization assists delivery of biomolecules (DNA, protein, RNA) without the need of additional delivery agent. The gold particles system improves the consistency of the particle sizes, controls the size distribution, increases the loading capacity, and improves the number of cells transfected, thereby making the biolistic process more efficient and consistent.

There is provided a photocatalyst for the conversion of carbon dioxide to ethanol. The photocatalyst includes a gallium nitride powder support and gold nanoparticles deposited on the gallium nitride powder support. The gallium nitride has rod-shaped pores having a length of from 1 to 5 μm, and the gold nanoparticles have a diameter of from 5 to 20 nm.

The objective is to provide a highly safe method for producing gold sulfite salts by generating fulminate as an intermediate substance. [Solution] The problem is solved by a manufacturing method that includes the steps of: dissolving a gold raw material in acid to prepare a gold acid solution; adding ammonia water to the gold acid solution to precipitate gold fulminate; washing the gold fulminate with pure water and an alkaline aqueous solution; and adding a metallic sulfite to the washed gold fulminate to prepare a gold sulfite solution.

The present invention relates to an extraction technique for low-cost recovery of battery-grade manganese sulfate from a manganese-containing nickel-cobalt raw material, the extraction technique comprising the following steps: (1) subjecting an extractant and liquid caustic soda to saponification to obtain an organic phase, wherein a P204 extractant is mixed with solvent oil for use, with the concentration of the P204 being 5%-50% and the balance being the solvent oil, and the saponification rate of the saponification of the mixed extractant and liquid caustic soda is less than or equal to 23.7%; (2) mixing a saponified organic phase in step (1) with a feed liquid for P204 extraction (a manganese-containing nickel-cobalt raw material liquid), and then performing an extraction operation by using a new extractor to obtain an impurity liquid and a raffinate obtained from P204 impurity co-extraction and containing less than or equal to 1 ppm of calcium, wherein the pH is controlled at 0-4.5 during extraction, and the post-extraction O / A ratio is equal to 0.415-5.2; and (3) sequentially performing the steps of extraction, scrubbing, manganese stripping, iron scrubbing and water washing on the raffinate obtained from P204 impurity co-extraction in step (2), thereby completing the treatment. The process is used for producing battery-grade manganese sulfate, without first enriching manganese and impurities into a manganese-enriched liquid and then using a C272 extractant to achieve manganese-calcium separation; therefore, not only are the costs required for producing the manganese-enriched liquid saved on, but also the utilization of the expensive C272 extractant is not required, thereby optimizing the overall process and greatly reducing the production costs.

The present disclosure relates to a method of preparing a nano-porous powder material. The method includes: firstly removing A in the alloy AxTy by using an ultrasonically-assisted de-alloying method to prepare a nano-porous T coarse powder, and then, allowing the nano-porous T coarse powder to perform M-ization reaction with a gas reactant containing M to obtain a nano-porous T-M coarse powder, and finally, further crushing the nano-porous T-M coarse powder using a jet mill to obtain a nano-porous T-M fine powder. The method can achieve low-cost mass production of the nano-porous T-M fine powder, bringing broad application prospects.

The extraction technology for recovering battery-grade manganese sulfate from manganese-containing nickel-cobalt raw materials at low cost comprises the following steps: (1) saponifying an extractant and liquid alkali to obtain an organic phase; using P204 extractant mixed with solvent oil, wherein the concentration of P204 is 5%-50%, and the rest is solvent oil; the saponification rate of the mixed saponification of the extractant and the liquid alkali is less than or equal to 23.7%; (2) mixing the organic phase after saponification in step (1) with P204 pre-extraction liquid (manganese-containing nickel-cobalt raw material liquid) and then using an extractor for extraction operation to obtain impurity liquid and P204 impurity extraction raffinate containing calcium of less than or equal to 1 ppm; the PH value in the extraction process is controlled at 0-4.5, and the O / A ratio after extraction is 0.415-5.2; (3) sequentially performing extraction, washing, manganese removal, iron removal, and water washing on the impurity extraction raffinate in step (2) to complete the treatment; the process is used for producing battery-grade manganese sulfate, without first enriching manganese and impurities in a manganese enrichment liquid and then using C272 extractant to realize manganese-calcium separation, thereby saving the cost required for producing the manganese enrichment liquid, without using expensive C272 extractant, optimizing the overall process, and greatly reducing the production cost.

The present invention provides a gold plating method, a gold plating composition, and a plating solution that realize soft gold plating. The gold plating method is carried out using a plating solution that contains gold sulfite and at least one of thiosulfate ions and trithionate ions.

The invention provides a gold plating method for realizing soft gold plating, a composition for gold plating and a plating solution. The gold plating method is carried out by using a plating solution containing a gold sulfite salt and at least one of a thiosulfate ion and a trisulfate ion.