9 results about "Diamond nanoparticles" patented technology

The invention relates to the technical field of peep-proof film manufacturing, and discloses a high-light-transmittance peep-proof layer for a peep-proof film and a preparation method of the high-light-transmittance peep-proof layer. The preparation method comprises the following steps: carrying out plasma treatment on a PET substrate; preparing amphiphilic block copolymer-carbon nanotube composite sol, and coating the amphiphilic block copolymer-carbon nanotube composite sol on the surface of a PET substrate to form a peep-proof structure layer; preparing titanium dioxide sol, mixing the titanium dioxide sol with UV resin, and coating the surface of the peep-proof structure layer with the mixture to form a high-refractive-index layer; and mixing diamond nanoparticles with UV-cured polyurethane acrylate, and coating the mixture on the surface of the high-refractive-index layer to obtain the high-light-transmittance peep-proof layer. Through the nanometer self-assembly technology and the dieless forming technology, the limitation of dependence of a traditional peep-proof layer preparation mold and a multi-layer complex technology is broken through, and the production cost is reduced and the environmental protection property is improved while the light transmittance and the wear resistance are improved.

The invention belongs to the technical field of inorganic synthesis process and chromatographic filler preparation, and particularly relates to a novel alkali-resistant protein A analysis column filler as well as a preparation method and application of the novel alkali-resistant protein A analysis column filler. The novel column packing for analyzing the recombinant protein A comprises the recombinant protein A and silica gel which is bonded on the recombinant protein A and is loaded with a diamond film, and the silica gel loaded with the diamond film is prepared by depositing diamond nano-particles on the surface of the silica gel to form a continuous film. Macroporous silica gel is adopted as a substrate for the first time, diamond (40-50 nm) is coated on the surface of the substrate through a chemical vapor deposition method to form a diamond film, and then the diamond on the diamond film is subjected to surface modification. Finally, the recombinant protein A is coupled to macroporous silica gel containing carboxylated diamond through EDC (N-ethyl-N '-(3-dimethylaminopropyl) carbodiimide), and the novel column packing for analyzing the recombinant protein A is finally obtained and is suitable for separating and analyzing biological samples.

The invention discloses an appearance refining process for a zinc-aluminum alloy die-casting optical module, which belongs to the technical field of optical modules and comprises the following steps of: firstly, carrying out chemical polishing treatment on the surface of the optical module, and then, placing a zinc-aluminum alloy die-casting piece in an electrolyte containing silicate-phosphate to generate a porous oxide film; an amorphous Ni-P layer is chemically plated on the surface of the oxidation film and permeates into pores of the oxidation film to form a nano rivet structure; depositing a nanocrystalline nickel layer on the Ni-P layer by adopting pulse electroplating; electroplating a Cu-graphene composite sacrificial layer on the surface of the nanocrystalline nickel layer; after the whole body is protected, the Cu-graphene composite sacrificial layer is removed, and meanwhile, the integrity of the nanocrystalline nickel layer at the bottom layer is reserved; after argon plasma pretreatment, magnetorheological fluid containing CeO2 / diamond nanoparticles is adopted for polishing; and forming a super-hydrophobic film on the surface of the optical module by adopting perfluoroalkyl silane vapor deposition. The refining process can meet the ever-increasing surface smoothness requirement of the optical module.

The present application relates to a kind of diamond nanoparticles infiltrates the method for reinforcing hard alloy and the composite material made, belongs to hard alloy strengthening field.The method is first mixed, dry screen powder by ball milling under argon protection to WC, Co, VC powder, then preliminary WC-Co hard alloy sample is prepared by spark plasma sintering process.The key step is to uniformly coat nano diamond dispersion liquid after the surface of sintered sample is polished, and cover protection plate, be placed in the crucible covered with diamond powder, in argon atmosphere, stage heating to 1250 DEG C and heat preservation 3h are carried out heat treatment, so that diamond nanoparticles infiltrate matrix, finally by ultrasonic cleaning to remove residue.The method significantly improves the hardness of hard alloy, the sample after processing significantly increases the vickers hardness compared with untreated sample without reducing core fracture toughness, effectively enhances the wear resistance of material, process is simple and controllable, suitable for high stress working condition tool material.

The invention discloses a boron-nitrogen co-doped graphene / diamond microelectrode and a wearable brain-computer interface, and the microelectrode is prepared by the following steps: step s1, pretreating a tantalum wire substrate, immersing the tantalum wire substrate into an ethanol suspension of diamond nanoparticles, and carrying out ultrasonic oscillation, so that the diamond nanoparticles are embedded into the surface of the tantalum wire substrate to form nucleation sites; obtaining a sample substrate; 2, a CVD cavity is cleaned, a tantalum wire with a carbonized layer serves as a hot wire, a bias system is turned on, the sample substrate is placed under the hot wire, hydrogen, methane and a boron source are introduced into the CVD cavity, and a boron-doped diamond film can be deposited on the surface of the sample substrate; and step s3, stopping introducing the boron source into the chamber, starting introducing nitrogen into the CVD chamber, and etching the surface of the boron-doped diamond film to prepare the boron-nitrogen co-doped graphene / diamond microelectrode, which can maintain excellent performance in high-frequency signal acquisition and long-time use processes, and is suitable for efficient monitoring and accurate stimulation of neural signals.

The invention discloses a diamond polishing solution and a preparation method thereof, and belongs to the technical field of precision polishing, the diamond polishing solution comprises the following components by weight: 0.1-10% of core-shell structure diamond (at) MOF nano-particles, 0.1-10% of a dispersant, 0.1-10% of a dispersant, and the balance of water. 0.5%-5% of a persulfate oxidant; 0.1%-2% of a zwitterionic buffer solution; 0.01%-1% of a self-repairing polymer; and the balance of deionized water. The core-shell structure diamond (at) MOF nano-particle takes nano-diamond as a core. The MOF shell layer provides permanent steric hindrance for diamond particles, the agglomeration problem is fundamentally solved, the polishing solution is long in storage period and extremely low in scratch risk, and the MOF shell layer breaks at a fixed point under pressure to release metal ions to catalyze oxidation reaction; sulfate free radicals activated according to needs provide super-strong oxidizing power; the self-repairing polymer dynamically repairs the micro-scratches; and micro-fluidic continuous preparation is adopted, so that nanoscale accurate control and high uniformity of the product are realized, and a reliable way is provided for industrial large-scale production.

The present invention relates to the field of composite materials, and particularly to a heat control composite film integrating heat insulation and heat conduction. The film comprises a first heat conduction layer, a heat insulation layer, and a second heat conduction layer which are sequentially stacked; both the first heat conduction layer and the second heat conduction layer are formed by stacking a plurality of composite heat conduction layers, and each composite heat conduction layer comprises a first metal layer, a second metal layer, and a composite graphene layer which are sequentially stacked; the composite graphene layer is composed of the following raw materials in parts by weight: 90 to 100 parts of graphene, 1 to 5 parts of diamond nanoparticles with a diameter of 5 to 20 nm, 1 to 5 parts of zinc oxide nanoparticles with a diameter of 5 to 30 nm, and 1 to 5 parts of titanium dioxide nanoparticles with a diameter of 10 to 30 nm; the heat insulation layer is a grid layer made of a metal nanomaterial composite polyester mesh or a metal nanomaterial composite nylon mesh. The present invention has a wide range of applications.

The invention relates to the technical field of semiconductor materials, and discloses a method for preparing patterned diamond and a patterned diamond semiconductor material. The invention provides a method for preparing a patterned diamond. The method comprises the following steps: providing a substrate of which at least one side is provided with a mask; imaging laser ablation processing is carried out on the mask so as to penetrate through the mask and prepare an imaging groove in the substrate, and the depth of the imaging groove is 0.2 [mu] m-3 [mu] m; spraying a diamond nano-particle dispersion liquid into the graphical groove so as to prepare a diamond nucleation; and performing mechanical removal treatment on the mask, introducing hydrogen and methane, and performing vapor deposition treatment on the diamond nucleation to prepare the patterned diamond. The method is easy to regulate and control, good in processing uniformity and beneficial to improving the quality of the prepared patterned diamond.

The synthesis of sub-five-nanometer nanodiamonds with high uniformity and purity. Inspired by the formation of natural diamond, iron carbide nanoparticles embedded in iron oxide matrices as the carbon source were used. High-pressure-high-temperature treatment of the precursor yields nanodiamonds with tunable diameters down to 2.13 nm and 0.22-nm standard deviation. The disclosed synthesis procedures also include a method for forming fluorescent nanodiamonds.