106 results about "Metal colloids" patented technology

A complex including magnetic particle bound to a metal colloid. The complex may be part of a reagent for use in a method for determining analytes. The reagent may include a binding partner specific for an analyte. The reagent may further include a first label that is distinguishable from a second label that is used to detect the analyte. The reagent is used in kits and methods for detecting analytes in samples. The methods include immunoassay methods, including method where the first label is used to calibrate the assay.

Disclosed is a metal colloid comprising: a solvent composed of water or a mixed solvent of water and an organic solvent; cluster particles comprising one or more metal species; and a protective agent for protecting the cluster particles, characterised in that the protective agent comprises a polymeric material which can be bound to one or more ion species selected from the group consisting of alkali earth metal ions, transition metal ions, rare earth metal ions, an aluminum ion and a gallium ion, and the protective agent has one or more ion species selected from the group consisting of alkali earth metal ions, transition metal ions, rare earth metal ions, an aluminum ion and a gallium ion bounded thereto.

With respect to the metal colloid of the present invention, metal colloidal particles capable of forming a metal colloid by dispersing in either or both of an aqueous dispersion medium and a nonaqueous dispersion medium in a predetermined proportion while mixing, comprise metal particles and a protective agent coordination-modified on the surface of the particles, the protective agent having a carbon skeleton containing either or both of sulfur and oxygen in the molecule, and having a structure of being coordination-modified on the surface of the metal particles using an atom or an atomic group of either or both of sulfur and oxygen as an anchor, wherein the protective agent has one, or two or more functional groups selected from the group consisting of alkoxysilyl group, silanol group and hydroxyalkyl group in a molecular structure.

It is a main object of the present invention to provide a method for manufacturing a conductive pattern capable of forming a highly precise pattern, also capable of forming by using a simple process, and being free from problems such as treatment of waste fluids. In order to attain the above object, the present invention provides a method for manufacturing a conductive pattern forming body comprising: a pattern forming body substrate preparing process of preparing pattern forming body substrate comprising a base material, and a photocatalyst containing layer formed on the base material comprising a photocatalyst and a binder whose wettability of an energy irradiated part is changed so as a contact angle to a liquid is reduced; a wettability pattern forming process of forming wettability pattern comprising a liquid repellent area and a lyophilic area on the photocatalyst containing layer by irradiating the photocatalyst containing layer in a pattern with energy; a metal colloid coating process of adhering a metal colloid only to the lyophilic area of the surface of the photocatalyst containing layer on which the wettability pattern is formed, by coating the metal colloid; and a conductive pattern forming process of forming conductive pattern by solidifying the metal colloid adhered to the lyophilic area of the wettability pattern.

The invention relates to a preparation method of a C10+ bicyclo-heavy aromatics selective hydrogenation cracking catalyst. The preparation method comprises the following steps of adding a surface active agent into an ethanol solution of nanometer lanthanum, cerium and yttrium oxides, uniformly stirring the mixture, slowly dropwise adding H2PtCl4 and/or H2PdCl4 solution under a microwave stirring condition, and forming stable metal colloid; loading the metal colloid on a carrier; drying the obtained catalyst in the shade under a room-temperature condition for 36 to 54 hours, and then drying the catalyst in an oxygen-free atmosphere at the temperature of 80DEG C to 180DEG C. The catalyst adopts one or two of Y molecular sieve and aluminum dioxide as the carrier, one or two of platinum and palladium as a main agent and one or more of lanthanum, cerium and yttrium as assistant, wherein based on the catalyst, the content of the main agent is 0.01 to 0.1 percent by weight, the content of the assistant is 1 to 5 percent by weight, and in the C10+ heavy aromatics selective hydrogenation cracking reaction, the catalyst has the characteristics of high hydrogenation reaction activity, high single-loop saturation selectivity and high liquid yield.

Disclosed is a method of manufacturing a composite member having a conductive pattern, comprising (1) forming on a surface of an insulating body a photosensitive layer containing both a photosensitive compound forming an ion-exchange group upon irradiation with an energy beam and a crosslinkable compound having a crosslinkable group, (2) forming a pattern of ion-exchange groups by selectively exposing the photosensitive layer to an energy beam so as to form an ion-exchange group in the exposed portion, (3) crosslinking the crosslinkable compound contained in at least the exposed portion of the photosensitive layer, (4) allowing metal ions, or a metal colloid to be adsorbed on the pattern of ion-exchange groups formed by the selectively exposing, and (5) forming a composite member having conductive pattern by depositing a conductive material on the pattern of ion-exchange groups having the metal ions, or the metal colloid adsorbed thereon using an electroless plating.

A complex including magnetic particle bound to a metal colloid. The complex may be part of a reagent for use in a method for determining analytes. The reagent may include a binding partner specific for an analyte. The reagent may further include a first label that is distinguishable from a second label that is used to detect the analyte. The reagent is used in kits and methods for detecting analytes in samples. The methods include immunoassay methods, including method where the first label is used to calibrate the assay.

The invention relates to a preparation method for acetic acid propylene ester synthetic catalyst. The carrier of the catalyst is silicon dioxide or the mixture of the silicon dioxide and aluminum oxide, and active components comprise main catalyst palladium, one of auxiliary catalyst of gold, copper, tin, cadmium, cerium, or a mixture of more auxiliary catalyst, kalium, etc. Being prepared by adopting a metal colloid method, the catalyst has the advantages that the grain size distribution is concentrated, the dispersion degree is high, the distribution of the active components on the carrier can be adjusted and controlled, etc. In the reaction of acetic acid propylene ester synthesized with propylene, acetic acid, and oxygen, the catalyst prepared by the method has the advantages that the selectivity is high, the activity is good, etc.

The invention belongs to a preparation method for a direct formic acid fuel cell carbon-supported palladium nanometer catalyst, which takes (WO3) n and xH2O or (MoO3) n and xH2O as colloid source to form metal colloid with PdCl2 and uses NaBH4 for reducing, thus obtaining the carbon-supported palladium catalyst. The palladium particles of the catalyst have uniform distribution and small average grain size. The catalyst prepared by the method has higher performance on the catalytic oxidation of formic acid than the carbon-supported palladium catalyst prepared by the traditional impregnation method which has the same loading capacity but no colloid source. The method with simple practice does not need protective agent and the colloid source can be removed through simple washing; therefore, the method is suitable for batch preparation of the carbon-supported palladium catalyst.

The invention relates to a method for preparing surface-enhanced Raman scattering (SERS) substrate by a solution method and application, and belongs to the technical field of SERS substrates. The method comprises the following steps: preparing hydrocarbyl mercaptan modified metal nanoparticles with the diameter of 1 to 5 nm; dissolving the metal nanoparticles with the diameter of 1 to 5 nm into an organic solvent to prepare metal nanoparticle sol of 60 to 100 mg/ml; and coating the metal nanoparticle sol on a substrate, placing a sample coated with a metal colloid film in a precise muffle furnace or a tube furnace, heating to 140 to 250 DEG C within 5 minutes, maintaining for 5 to 30 minutes, and cooling to room temperature. When the SERS substrate obtained by the method is applied to detection of rhodamine 6G and 4-mercaptopyridine, the enhancement factor is 107, and the relative standard difference of Raman signal intensity distribution at different positions is 5%.

A silver dispersion is obtained by reducing a silver compound in the presence of a polymeric dispersant of an ionic hydrophilic segments, such as methacrylic acid segments and nonionic hydrophilic segments of alkoxy-terminated polyethylene glycol segments. Aqueous inkjet inks may contain such dispersants and other common ingredients such as a humectant. The printed inks can be sintered under heat to form solid, conductive patterns of silver.

A method for separating metal nanoparticles from colloidal metal solution includes providing a colloidal metal solution, including a plurality of metal nanoparticles; mixing a precipitating agent with the colloidal metal solution for maintaining the power of hydrogen value (pH) of the colloidal metal solution in a specific value; keeping the colloidal metal solution stationary for a static time at an environmental temperature such that the metal nanoparticle precipitates from the colloidal metal solution, and the colloidal metal solution forms a supernatant and a precipitating liquid; separating a precipitate from the precipitating liquid by a filtering process; and liquid blasting the precipitate by a first solvent to obtain the metal nanoparticles.

The invention provides a method for preparing a catalyst for removing CO from a hydrogen-rich atmosphere by selective oxidation. The catalyst is characterized in that the carrier thereof adopts Al2O3 or SiO2-Al2O3 with the weight percentage of SiO2 being 3-40%; and the active component thereof is one or more than one selected from the following noble metal elements: Ru, Rh, Pd and Pt. Based on a metallic colloid method, the method of the invention for preparing the catalyst comprises the following steps: adding surfactant to the aqueous solution of metal salt of the active components in the noble metal elements; slowly adding reducing agent drop by drop while stirring intensely, so as to obtain stable noble metal colloid with the particle size thereof being 2-10nm through reduction by a reducing agent; properly regulating loading conditions and loading the noble metal colloid onto the carrier, so as to obtain a loading-type metal colloid catalyst; and subjecting the metal colloid catalyst to room-temperature airing, oven-drying and reducing, to obtain the finished catalyst.

The present invention relates to a conductive adhesive for screen printing containing metal colloid particles (A) containing metal nanoparticles (A1) and a protective colloid (A2) containing an organic compound having a carboxyl group and a polymer dispersant having a carboxyl group, a viscosity modifier (B) having an amide bond and/or a urea bond, and a dispersion solvent (C).

Methods and compositions for treating biofilms and diseases associated with amyloidosis such as Alzheimer's, Parkinson's and Huntington's disease, and Type 2 diabetes, by destroying amyloid fibrils in a two-step treatment are disclosed. The first step consists of binding to the amyloid fibril an intercalating molecule with a negatively charged group such as Congo red. The second step consists of adding metal ions, such as silver, gold(I), copper(I), palladium or lead ions or metal colloids of silver or gold, which destabilize the amyloid-dye complex. This process results in a disintegration of the fibril into peptide monomers and small aggregates of monomers.

Provided are metal nanoparticle composite body whose multiple properties, such as a good metal nanoparticle control property, high dispersion stability, a good low-temperature firing property, and ease of purifying and separating metal nanoparticles, are intentionally added and controlled so that practical electrical conductivity can be exhibited, a metal colloidal solution in which the metal nanoparticle composite body is dispersed, and methods for producing these. A metal nanoparticle composite body includes a nitrogen-containing compound (A) and a metal nanoparticle (B), in which the nitrogen-containing compound (A) contains an oxidized nitrogen atom. A metal colloidal solution is obtained by dispersing the metal nanoparticle composite body in a medium. A method for producing a metal colloidal solution is characterized in that metal ions are reduced in a medium in the presence of a nitrogen-containing compound (A) containing an oxidized nitrogen atom so as to form metal nanoparticles (B).

The electrically conductive ink in accordance with one embodiment of the present invention includes a metal colloid liquid and a saccharide compound, wherein the electrically conductive ink comprises the saccharide compound in an amount equivalent to at least 3% by weight and at a maximum 15% by weight of a solid content of the metal colloid liquid. This way, it is possible to provide an electrically conductive ink making it possible to form an electrically conductive film having a high electrical conductivity and a high adhesiveness to a substrate, to provide an electrically conductive film made from the electrically conductive ink, as well as to provide a production method of the electrically conductive ink and a production method of the electrically conductive film.

The invention discloses a method for preparing a metal colloid at normal temperature, which belongs to the field of preparation of colloids. The method is characterized by comprising the following steps of: mixing a polyol solution with the concentration of a promoter of 0.00002-10mol/L and the polyol solution with the concentration of a metal precursor of 0.00001mol/L-1mol/L, enabling the molar ratio of the promoter to the metal precursor to be 2-100 and reacting at room temperature to prepare metal-sol, wherein the prepared metal-sol has ultrahigh stability, and the particle size of metal is 1-20nm. The metal-sol prepared by the method disclosed by the invention has good stability, and the particle size distribution of metal nanoparticles is uniform. The method disclosed by the invention has a simple process and is suitable for large-scale generation of the metal colloids, protecting agents on the surfaces of the generated nanoparticles are easy to clean, a catalyst prepared by the method disclosed by the invention has high activity, and the method further has good economic benefits and industrial application prospects.

The glass with coated multilayer color film consists of glass, metal film layer penetrating to 2-15 micron below glass surface and silicon film deposited on the surface of glass. The production process includes ion penetration to form metal film and chemical vapor deposition to form silicon film. In the tin tank in float glass producing line, electric field is applied to high temperature glass belt, so that metal ions migrate into glass belt surface layer before being reduced in reduction atmosphere into metal colloid to form the metal film layer. Then in a reactor, one layer of silicon film is formed on the moving glass belt through chemical vapor deposition. Through altering the kind of penetrated metal, glass in the required color may be produced. The outer silicon film can strengthen the stability and reflecting effect of the metal film, reduce the transmittance of the metal film and raise the surface wear resistance.

This invention relates to the metal nanometer tube making method, which includes the following steps: fistly making the metal colloid water-solubility solution, then extracting the metal from the water-solubility solution by the organic substance that has the coordination action with the metal, and distributing it in the organic solvent to get the metal colloid solution. The metal will deposit on the substrate when various substrates dips in this solution. If the substrate is the moulding board with the nanometer opening, then the metal will deposit on the inwall of the opening to form the matel nanometer tube. Controlling the dipping time and dipping number can get the nanometer tubes with different thickness. Using the moulding boards with different internal diameter nanometer opening can get the namometer tubes with different diametics. And using this invention can not only obtain the metal namometer tube whose structure and dimension can be controlled, and can obtain the metal nanometer tube array whose height is ordered.

To provide an SO₃ reduction catalyst for purifying an exhaust gas capable of efficiently reducing the amount of SO₃ that is present in a combustion exhaust gas and is a starting substance of S-containing substances such as acid ammonium sulfate causing deterioration of performance of the catalyst or corrosion of apparatuses disposed downstream of the catalyst, or capable of controlling the generation of SO₃ in the catalyst itself; a preparation process of the catalyst; and an exhaust gas purifying method using the catalyst.

In the catalyst for purifying a combustion exhaust gas containing nitrogen oxides, 50 wt. % or greater of the amount of Ru and/or Ir to be supported is adjusted to fall within a depth of 150 μm from the surface layer of a substrate; and the catalyst is prepared by immersing the substrate in a metal colloid solution of Ru and/or Ir to be supported or an aqueous solution containing at least one compound selected from compounds of Ru and/or Ir to be supported.

Nano fine particles of noble metal in catalyst are modified by high polymer of guiding protons. Inductive the said high polymer can increase steric hindrance of fine particles of noble metal in order to anchor fine particles of noble metal in catalyst on surface of carrier so as to raise use ratio of catalyst. Farther, the high polymer of guiding protons is a better bonding agent also. Better binding force is existed between Nano fine particles of noble metal modified by the high polymer and carrier. The synthesized catalyst possesses function of guiding protons. The method for preparing the catalyst includes steps: preparing colloid of Nano noble metal modified by the said high polymer in advance; then, depositing the prepared colloid on carbon carrier. Average particle diameter of noble metal in catalyst is 2-5 Nano, and diameters are distributed evenly. Battery produced from the catalyst possesses better performance of electric output.

The invention discloses a cheap disorder broad-spectrum wide-angle antireflection structure and a manufacturing method thereof. The manufacturing method comprises the steps of: s1, depositing a dielectric film on the surface of a substrate material (or structure); s2, forming a metal colloid film on the surface of the dielectric film; s3, heating the metal colloid film to obtain a metal nano structure; s4, etching the dielectric film by taking the metal nano structure as a mask to form the antireflection structure; s5, and removing the metal nano structure. The dielectric nano structure manufacturing scheme provided by the invention is simple and practicable, can achieve large-area manufacturing, only needs low temperature, and is low in manufacturing energy consumption and high in efficiency. In addition, the manufactured disorder dielectric nano structure and the residual metal mask can obtain excellent broad-spectrum wide-angle antireflection effect.