86 results about "Carbon based nanomaterials" patented technology

A complementary metal oxide semiconductor (CMOS) device, e.g., a field effect transistor (FET), that includes at least one one-dimensional nanostructure that is typically a carbon-based nanomaterial, as the device channel, and a metal carbide contact that is self-aligned with the gate region of the device is described. The present invention also provides a method of fabricating such a CMOS device.

The invention discloses preparation and applications of a supported palladium catalyst using a MOFs derived carbon-based material as a carrier, and belongs to the technical field of catalyst material preparation. According to the present invention, ZIF-67 is adopted as a template, reduced palladium nanoparticles are uniformly supported in the pore channels in the ZIF-67 during a ZIF-67 synthesis process, and under a nitrogen protection condition, the carbon-based nanometer material supported palladium catalyst having excellent catalysis performance is constructed through high temperature carbonation; the preparation method of the invention is simple and easy to perform; and the prepared catalyst maintains the high specific surface area and the abundant pore structure characteristics of the precursor ZIF-67 to a large extent, such that the uniform dispersion and the stabilization of the palladium nanoparticles are easily achieved, and the excellent catalytic activity is provided.

The invention discloses a light-adjustable room-temperature phosphorescent carbon dot material, a preparation method and applications thereof, and belongs to the technical field of preparation of luminescent carbon nanometer materials. The method comprises the following steps: weighing different inorganic salt powder, putting into a sample bottle, adding distilled water, fully stirring, drying, and grinding to obtain a uniform mixed salt system; and grinding a carbon source and the mixed salt system, putting the grinded materials into a crucible, carrying out heat preservation at 140-400 DEG Cfor 2-6 hours at a heating rate of 8-12 DEG C, and cooling to room temperature to obtain the carbon-based nanometer material with room-temperature phosphorescence. According to the invention, the method effectively solves the problems of complex preparation method, expensive raw materials, high toxicity and short-wavelength phosphorescence emission of the existing phosphorescent material, and canbe used for simply preparing a large batch of room-temperature phosphorescent materials with light adjustability.

The invention relates to a support material which comprises a carbon-based nano material, natural macromolecules and a one-dimensional inorganic nano material; the carbon-based nano material is crosslinked with the natural macromolecules through amide bonds; the natural macromolecules are self-crosslinked through the amide bonds; the one-dimensional inorganic nano material absorbs the natural macromolecules. The support material provided by the invention not only can induce the differentiation of the stem cells through the chemical activity of the nano material (such as osteogenic differentiation), but also can regulate and control the differentiation of the stem cells through a micro-nano structure on the surface of the support material (such as osteogenic differentiation), and has the function of promoting the regeneration and the repair of defective tissues (such as bone tissues) in vivo.

The invention discloses a preparation method of a carbon-based nanometer material transistor consisting of carbon nano tubes and graphene. The method provided by the invention comprises the following steps: firstly arranging metallic carbon nano tubes and semiconducting carbon nano tubes on a substrate; utilizing a conducting material to lead out electrodes at two ends of each carbon nano tube; depositing a layer of dielectric material above the carbon nano tubes; then transferring the graphene onto the carbon nano tubes on which the dielectric material is deposited; leading out the electrodes of the carbon nano tubes; and depositing the conducting material at the two ends of the graphene, thus forming the electrodes. According to the invention, the carbon-based nanometer material transistor of two types of structures can be simultaneously manufactured, wherein one carbon-based nanometer material transistor is characterized in that the semiconducting carbon nano tubes are utilized as channels and the graphene is utilized as gate electrodes; and the other carbon-based nanometer material transistor is characterized in that the metallic carbon nano tubes are utilized as the gate electrodes and the graphene is utilized as the channels.

An ion detection device has a strip of carbon-based nanomaterial (CNM) film and a chamber enclosing the CNM film. A low bias voltage is applied at the ends of the CNM film strip, and ions present in the chamber are detected by a change in the magnitude of current flowing through the CNM film under the bias. Also provided are methods for fabricating the device, methods for measuring pressure of a gas, and methods for monitoring or quantifying an ionizing radiation using the device.

It is contemplated that the current invention may comprise applications utilizing nano-materials, such as but not limited to, superhydrophobic nano-materials, or carbon based nano-materials which may be applied in a spray, wipe on, powder, manufactured into the material or surface of durable medical equipment, devices, prosthetics and so forth.

The invention provides an imaging coil for magnetic resonance imaging. The imaging coil comprises at least one conductor. Each conductor comprises at least one carbon-based nanometer material part and further comprises at least one metal conducting part, wherein each metal conducting part is arranged at the end of the corresponding carbon-based nanometer material part and the carbon-based nanometer material parts account for 10% or less than 10% of the weight of the conductors. By the adoption of the technical scheme, the signal to noise ratio of the imaging coil is higher, and the image quality of a nuclear magnetic resonance imager with the imaging coil is more precise and accurate.

The invention provides carbon quantum dots prepared from pyrolysis molecular sieves and application of the carbon quantum dots in detection of hydrogen peroxide, and belongs to the technical field ofcarbon-based nanomaterials. With the aid of the spatial confinement effect of the molecular sieves, the carbon quantum dot materials with ultraviolet light excitation, small size, size uniformity (about 2.5 nm), good stability and photoluminescence properties are obtained through hydrothermal synthesis and aftertreatment, and the carbon quantum dot materials can be applied as a fluorescent probe to detect hydrogen peroxide. The main preparation process includes the following steps that an aluminum source, a magnesium source, phosphoric acid and an organic templating agent are used as raw materials, molecular sieve crystal products are prepared through hydrothermal synthesis, and water-soluble carbon dot products are obtained through pyrolysis, chromatography and the like. The prepared carbon dots show excitation-independent blue fluorescence (the emission peak is about 420 nm) and can achieve high sensitivity response to hydrogen peroxide. The quenching constants and detection limits of the carbon dots are 7.3 x 10(3)M(-1) and 3.16 microM respectively.

The invention relates to a method for detecting photochemical activity of a carbon nano tube by utilizing a transient absorption spectrum technology and belongs to the field of photochemical activity detection of carbon nano tubes. The method comprises the following steps: a, preparing aqueous solution of the carbon nano tube, ultrasonically treating the aqueous solution of the carbon nano tube, standing, and taking supernatant liquid of the aqueous solution of the carbon nano tube as a detection object; b, analyzing photochemical properties of the aqueous solution of the carbon nano tube under illumination conditions by utilizing a laser flash photolysis instrument; and c, verifying and analyzing a characteristic peak of the transient absorption spectrum of the carbon nano tube obtained by the laser flash photolysis instrument in step b by utilizing a pulse radiolysis device. According to the detection method, aiming at a special carbon-based nano material such as the carbon nano tube, the photochemical activity particles in the aqueous solution can be conveniently and reliably detected, the carbon nano tube is insensitive to interference of an external environment, and a carbon nano tube sample is not required to be excessively modified and treated in the earlier stage.

The invention discloses a carbon-based nano-material composite safe toe cap and a preparation method thereof. The carbon-based nano-material composite safe toe cap is prepared from, by mass, 40-50 parts of thermosetting resin pulp, 30-35 parts of fiber cloth, 0.1-10 parts of carbon-based nano-materials, 5-10 parts of solvent, 5-10 parts of nitrile rubber, 1-2 parts of curing agent, 0.9-1.1 parts of release agent, 0.9-1.1 parts of thickening agent and 0.9-1.1 parts of accelerant. The carbon-based nano-material composite safe toe cap has the advantages of being low in weight, good in uniformity, high in strength, resistant to corrosion, good in anti-bacterial effect, high in glossiness and good in air permeability and has the capacity of restoring immediately after deformation caused by impact.

The present invention discloses electrochemical in-situ purifying process of carbon base nanometer electrocatalyst material. Through electrochemical in-situ purifying and activating process, the transition metal catalyst contained in the carbon base nanometer material is in-situ purified and activated. The nanometer metal particles on the carbon base nanometer material are eliminated while maintaining the micro structure and electrocatalytic performance of the carbon base nanometer material without destruction. The present invention has the features of simple operation, low cost, short purifying period, and no destruction on the micro structure and performance of the carbon base nanometer material.

The invention discloses a preparation method and application of conductive aggregate, relates to the technical field of intelligent cement-based composite materials, and aims to solve the problems that direct introduction of a carbon-based nano material is difficult to disperse in a cement matrix, and the developed intelligent cement-based composite material is usually at the cost of sacrificing working performance and mechanical performance. The method comprises the following steps: grafting calcium ions to the surface of the fine aggregate, and then continuously mixing the fine aggregate with a graphene oxide solution under a heating condition to obtain the fine aggregate with the surface coated with graphene oxide; and carrying out high-temperature reduction treatment and microwave reduction treatment on the graphene oxide, and reducing the graphene oxide into graphene in situ to obtain the graphene-coated aggregate. And finally, mixing the conductive graphene aggregate, cement and water to form a stable conductive aggregate structure in the cement-based composite material. According to the prepared conductive cement-based composite material, the technical barrier that mechanical properties and electrical properties cannot be obtained at the same time is overcome under the condition that nano materials with extremely low doping amount are used. The method is applied to the field of conductive cement-based materials.

The invention discloses a modified silk-screen printing electrode and an application thereof. Printing raw materials of an electrode carbon layer comprise carbon paste, a carbon-based nano material and an oxalic acid, the mass fraction of the carbon-based nano material is 0.3-0.5%, the mass fraction of the oxalic acid is 1-1.6%, and the balance is the carbon paste; and gold nanoparticles are deposited on the surface of a working electrode of the electrode. When the modified screen-printed electrode is used for detecting a content of trivalent arsenic ions, an electrochemical signal can be effectively improved, and the enrichment capacity of the trivalent arsenic ions on the surface of the electrode can be increased; and during use, the detection cost is low, the sensitivity is high, dependence on large instruments and professional operators is avoided, and the application range is wide.

The invention belongs to the field of composite materials, and in particular relates to a surface modified fibre for filling reinforcement, a preparation method of the surface modified fibre for filling reinforcement, and a fibre reinforced composite material. The surface modified fibre for filling reinforcement is composed of a fibre body and a hybrid coating loaded on the surface of the fibre body; the hybrid coating is composed of a polyvinyl alcohol basal body and a carbon based nano-material dispersed in the polyvinyl alcohol basal body; and the mass ratio of polyvinyl alcohol to the carbon based nano-material in the hybrid coating is (0.5-5):(0.1-5). By means of the surface modified fibre for filling reinforcement in the invention, the surface roughness and the surface energy of thefibre can be increased; when the fibre reinforced composite material is prepared, the composite effect of the fibre and the basal body can be improved; the density of an interface layer is increased;and the composite strength is increased.

The invention provides a preparation process of a low melting point composite material reinforced by a carbon-based nanometer material, and relates to a method of preparing a SnAgCu series high strength and tough composite solder reinforced by nickel particle modified reduced graphene oxide through a powder melting method, wherein a reinforced phase Ni-rGO is prepared by a ball-milling-thermal decomposition method. The preparation process includes the specific steps that rGO is placed in a planetary ball mill for ball-milling, the ball-milled rGO and Ni(CH3COO)2.4H2O powder are evenly mixed inproportion, and the mixture is heated in a tube furnace to form the Ni-rGO; the Ni-rGO is mixed with solder powder in proportion and then mixed in a drum type ball mill; and the mixed solder powder is loaded into a corundum crucible and heated in a muffle furnace, and the Ni-rGO reinforced composite solder is obtained after air cooling. According to the preparation process, the powder melting method is used for preparing the low melting point composite solder reinforced by the nickel nano particle modified reduced graphene oxide, and the strength of the material is improved.

The invention disclose application of a carbon-based nano material in preparation of a drug for relieving or treating HD, and solves the problem that the synthesis cost of an existing carbon nano material such as fullerene is too high. The carbon-based nano material has the remarkable advantages of good water solubility, capability of degrading and effectively inhibiting aggregation of huntingtin Htt; and cell experiments and animal experiments show that the carbon-based nano material can alleviate the toxicity of mHtt aggregation on neurons and improve the learning and memory ability of HD model mice.

The invention discloses a preparation method of a metallic fuel pellet with high irradiation stability. The preparation method comprises the following steps: firstly, mixing uranium-based alloy powderand a carbon-based nanomaterial according to the volume ratio of (99.9-99):(1-0.1), then, placing the mixture into a nylon ball milling tank, adding zirconia grinding balls of which the mass is 3 times as high as that of the mixture, and carrying out mixing for 24h to obtain a mixed powder; and secondly, carrying out pressureless sintering, hot pressed sintering, spark plasma sintering or flash sintering on the mixed powder, after heat preservation and pressure preservation, carrying out furnace cooling, taking out the cooled material, and then, processing and molding the cooled material to obtain the metallic fuel pellet. The metallic fuel pellet obtained by using the method has the advantages of high uranium loading capacity, high heat conductivity, good anti-irradiation properties, strong fission gas accommodating capacity and excellent mechanical properties and can be used as a novel nuclear fuel of a nuclear reactor.

The invention provides a porous carbon-based nano material, and a preparation method and application thereof. The porous carbon-based nano material provided by the invention is obtained by performing pore forming on a porous carbon-based nano material precursor by taking KOH as an activating agent, and the specific surface area of the obtained porous carbon-based nano material exceeds 2000 m<2>/g and is far larger than that of the existing porous carbon-based material. The porous carbon-based nano material has the advantages of large specific surface area, good chemical stability, large adsorption capacity and the like, and can more effectively adsorb organic pollutants such as pigments, COD, soluble phenols and vinyl chloride, inorganic pollutants such as nitrate and arsenic oxide, and pollutants such as heavy metal ions in wastewater, so the porous carbon-based nano material improves the use efficiency of activated carbon in unit volume as much as possible.

A method for reducing salinity stress symptoms in a seed plant, comprising the step of adding carbon-based nanomaterials into a salinity growth medium in which the seed plant is cultivated, the salinity growth medium is in a salinity condition which causes the seed plant cultivated in the growth medium demonstrates the salinity stress symptom.