58results about "Gold compounds" patented technology

Methods of synthesizing MOF materials are disclosed. Further, plasmonic MOF composites and uses thereof as a recyclable catalyst, for ultrafast desorption (e.g., of solvents), MOF activation are also disclosed.

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.

A method for producing nanometric gold (III) oxide particles is characterized in that 5-95 ml of an aqueous solution of L-ascorbic acid or D-ascorbic acid or L,D-ascorbic acid having a concentration of 2.0 ·10-4 - 9.0 ·10-3 mol / dm3 is added to 5-95 ml of HAuCl4 solution having a concentration of 1.0·10-4- 3.0·10-3 mol / dm3 and a temperature in the range of 10-100°C, and is stirred at 100-700 rpm for 10-60 minutes, and a temperature is maintained at 80-100°C, after which the resulting colloidal solution is cooled down to room temperature. Preferably, a steric particle stabilizer in the form of polyvinyl alcohol or polyvinyl pyrrolidone, in an amount of up to 5 g per 100 ml of solution, and optionally, chlorate salt in the form of NaClO4 or KClO4 in an amount of up to 0.1 g per 100 ml of solution, is added to the cooled colloidal solution and then is stirred until the stabilizer is completely dissolved.

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.

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.

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 relates to a chemically sensitive sensor for detecting volatile organic compounds, the sensor comprising a substrate, an electrode array, a micro-barrier, and a sensing layer comprising a multiplicity of core-shell particles in close-packed orientation, the particles comprising a metal nanoparticle (MNP) core and an organic ligand shell, wherein the MNP core has a mean particle size below about 15 nm. The invention further provides a method for fabrication of the chemically sensitive sensor.

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 invention relates to a semiconductor nanoparticle composed of a compound containing Ag, Au, S and a metal M as essential constitutional elements. In the present invention, the metal M is at least any of Al, Ga, In, Tl, Zn, Cd, Hg and Cu, and the compound has a total content of Ag, Au, S and the metal M of 95 mass% or more. In addition, a ratio (x / (x + y)) of the number of atoms of Ag to a sum of the number of atoms of Ag, x, and the number of atoms of Au, y, in the AgAuS-based multicomponent compound is preferably 0.50 or more and 0.88 or less. The semiconductor nanoparticle of the present invention has appropriate emission and extinction characteristics and is biocompatible.

An effective and safe composition comprises an anionic gold-polydopamine core-shell nanoworm as an alternative gene carrier for bypassing the bottleneck of endosomal entrapment. The nanoworm can be used in methods of delivering therapeutic oligonucleotides to a subject. A polydopamine shell supports the surface adsorption of nucleic acids. The anionic nucleic acid-encased nanoworm can then enter cells without transfection agents and activate the ClC3 H + / Cl - exchanger in late endosomes to mediate vesicular accumulation of H + and Cl -, which causes membrane rupture, and finally escape to cytosol without cell-penetrating peptides or mechanical stimuli. The nanoworm can be further used for programming cellular responses, i. e., primary macrophage polarization and stem cell differentiation, for the treatment of diseases, such as kidney fibrosis and acute liver injury.

The invention relates to a method and kit for quick and low-cost determination of the iodide ion content, which can be used not only to detect the possible iodine deficient conditions but also to estimate the iodide ion concentration of aqueous solutions. The present invention relates to a method for the determination of iodide ions in an aqueous solution, comprising the steps of: a) providing a liquid sample for which iodide ion concentration has to be determined, b) adding at least one drop of aqueous solution of metal ion to the liquid sample of step a) wherein the metal ions selectively precipitate with iodide ion under normal conditions; c) shaking the liquid sample of step b) and waiting for 1 to 5 minutes, preferably 3 minutes; d) repeating steps b) and c) until the precipitation is clearly visible to the naked eye in the test solution; e) recording and summing up the number of drops; and f) determining the amount of iodide ions based on the number of drops. The present invention further relates to a kit for determination of iodide ions in an aqueous solution. The kit according to the invention comprises a sample vessel, a vessel equipped with a dropper wherein the said vessel contains a metal salt solution which selectively precipitates with iodide ion content under normal conditions and an instruction for describing the method of determining the iodide ions in aqueous solution.

Gold obtained as a result of the standard gold refining process may contain 0.1 - 0.2 ‰ silver and / or copper impurities. These impurities prevent obtaining gold with a purity of 99.9 ‰. In this process of the invention, a second chemical washing process is applied to the brown colored gold powders obtained as a result of the refining process, which is called cake form in the industrial terminology. Trace amounts of silver and copper are dissolved and removed from the gold by means of this chemical. The invention relates in particular to a gold purification method.

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 present invention belongs to the technical field of nano-enzyme material preparation and chemical analysis detection, and relates to a new method for nano-enzyme colorimetric detection of sulfur-containing pesticides. The synthesized Au-Ag NCs have pseudoperoxidase activity, and can catalyze hydrogen peroxide to oxidize TMB to form a blue product under acidic conditions. Based on the electrostatic interaction between Au-Ag NCs and four sulfur-containing pesticides, the exposed Au and Ag single substances are further bonded with S in the pesticide molecules, resulting in the loss of the pseudoenzyme activity of Au-Ag NCs to block the catalytic oxidation process, and the content of sulfur-containing pesticides in the test system can be determined. The present invention has the advantages of good specificity, high sensitivity, fast response speed, etc., and can provide a new means for the content determination of sulfur-containing pesticides.

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.

[Problem] The purpose of the present invention is to provide: a nitride material obtained by doping AlN with impurities, in particular, a nitride material having an electrical resistivity of at most 1.0 Ω∙cm; and a diode and a transistor using the same. [Solution] This nitride material is represented by the chemical formula A1α1B1β1Al1-α1-β1N or the chemical formula A1α1B1β1Ga1-α1-β1N, where α1 and β1 satisfy expression (1), or is represented by the chemical formula B2β2Al1-β2N or the chemical formula B2β2Ga1-β2N, where β2 satisfies expression (2), wherein B1 and B2 include a monovalent substance. Expression (1): 0<α1 / β1<6 Expression (2): 0<β2<0.52 (0<α1<1, 0<β1<1, A1 is at least one among Mg and Zn, and B1 and B2 are each at least one among Au, Ag, and Cu.)

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.

A method is disclosed of assembling building blocks into supraparticles. The method includes applying a first solvent on a template of patterned recessed regions to wet surfaces of the recessed regions; applying a second solvent on the template of patterned recessed regions, the building blocks suspended in the second solvent; wherein the first solvent and the second solvent are partially miscible, resulting in negligible interfacial surface tension between the first and second solvents; and wherein droplets of the second solvent diffuse droplets of the first solvent in the recessed regions, thereby assembling the building blocks into the supraparticles in the recessed regions.

The present disclosure relates generally to the field of nanotechnology. Particularly, the present disclosure provides a confined-dewetting method for synthesis of metal nanoparticles comprising: a) depositing a thin metal film on a substrate to form a metal film coated substrate; b) placing the metal film coated substrate in a thermal conducting container followed by adding a liquid form of polymer to obtain a polymer containing metal film coated substrate; c) heating the polymer containing metal film coated substrate under condition to grow nanoparticle and converts the liquid form of polymer to solid polymer film; and d) removing the solid polymer film to obtain a metal nanoparticle. The present disclosure provides a high-density and low-dispersity metal nanoparticles.

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.

Methods of synthesizing MOF materials are disclosed. Further, plasmonic MOF composites and uses thereof as a recyclable catalyst, for ultrafast desorption (e.g., of solvents), MOF activation are also disclosed.

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.