5 results about "Diamond nanoparticles" patented technology

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 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 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 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.