60 results about "Co assembly" patented technology

Porous films with straight pores oriented normal to the plane of the films are produced through solution processing techniques. The production takes advantage of inorganic-surfactant or inorganic-polymer co-assembly and a patterned substrate. The patterned substrate, which is also produced via solution phase self-assembly, forces vertical orientation in a hexagonal cylinder system with no practical limits in substrate size or type. This provides a route to vertically oriented inorganic pores with a pitch ranging from 3 nm to over 15 nm and pore sizes ranging from 2 nm to over 12 nm. The size is tuned by choice the choice of organic templating agents and the deposition conditions. The pores can be produced with or without a capping layer which can be used to seal the nanopores.

The invention relates to a preparation method of a crack-free large-area optical crystal, in particular to a preparation method of a crack-free large-area opal structure and an inverse opal structural optical crystal. A support substrate of the optical crystal selected in the invention is a hydrophilic flexible substrate, and the crack-free large-area opal structure or a composite opal structural optical crystal can be obtained by performing self-assembly on monodispersed colloid particles on the support substrate or performing co-assembly and polymerization on the monodispersed colloid particles and a water-soluble polymer monomer on the hydrophilic flexible substrate. A crack-free large-area inverse opal structural optical crystal can be obtained by further dissolving the monodispersed colloid particles in the composite opal structural optical crystal. The preparation method related to the invention has the advantages of low cost, easiness for operating, environmental friendliness and high generality. The prepared optical crystal can be practically applied to the fields of high-performance optical devices, chemistry, biochemical detection, and the like.

The invention discloses methods of producing thermally stable mesoporous transition metal oxide compositions by aqueous co-assembly of glycometallates and metal complexes with a surfactant template, without the necessity of the use of stabilizers. Mesoporous (nickel/platinum)-yttria-zirconia materials are also disclosed for use as electrode materials in solid oxide fuel cells. These materials display the highest surface area of any form of (metal)-yttria-stabilized-zirconia, thereby providing significant improvement in the efficiency of solid oxide fuel cells.

Mesoporous carbon and silica containing composites are prepared based on the co-assembly of a suitable surfactant in a liquid medium. When a low molecular weight carbonizable polymer and a silica precursor are added to the surfactant solution, a mixture of distinct phases of the materials is formed after solvent evaporation. A polymer/silica solid composite with highly organized mesopores is obtained after surfactant removal. This product has utility as a catalyst support or gas absorbent. And the polymer-silica composite can be easily converted successively to a mesoporous carbon-silica composite and to a bimodal mesoporous carbon material.

The invention discloses a tetravinyl-based Gemini type amphiphilic compound as well as a preparation method and application thereof. The compound disclosed by the invention is mainly prepared through McMurry coupling reaction, nucleophilic substitution reaction and Click reaction; the structure of the compound is also confirmed through infrared, nuclear magnetic and mass-spectrum ways; in an aqueous solution, molecules of a derivative of the compound disclosed by the invention self-assemble to form aggregation-induced fluorescence-enhanced micelles (AIE micelles); the compound acts with a nucleic acid, and then can co-aggregate to form nano particles easy for cellular uptake; green fluorescent protein (GFP) and luciferase (Luciferase) expression assays prove that the compound self and a liposome formed with dioleoyl phosphatidyl ethanolamine (DOPE) can be used as non-viral gene vectors; meanwhile, the derivative is successfully used for tracing the cellular uptake and release processes of pGL-3 and FAM-DNA by utilizing the reversible transformation between the self-assembly of the compound and the co-assembly with DNA (Deoxyribonucleic Acid).

The invention belongs to the technical field of advanced nano materials, and specifically relates to a magnetic ordered mesoporous carbon-based or polymer-based core-shell structural composite microsphere and a preparation method thereof. According to the preparation method, magnetic nanoparticles are adopted as seeds, and the surface of the magnetic nanoparticles is coated with a dense silica protective layer with a sol-gel method; a macromolecular surfactant/polymer layer composite material of an ordered mesostructure is deposited on the surface of silicon dioxide by adopting an interface co-assembly technique and using a large molecular weight block copolymer as a templating agent; and finally, a magnetic mesoporous carbon-based composite microsphere having a strong surface hydrophobicity is obtained by calcination and carbonization in nitrogen, or a surface functionalized magnetic mesoporous polymer-based composite microsphere is obtained by removing the templating agent on the surface of the macromolecular with a solvent extraction method. The composite microsphere provided by the invention has the characteristics of strong magnetic responsiveness, relatively large ordered mesoporous passages, regular and ordered shell core structure, controllable hydrophilia and hydrophobicity and easy material transport and diffusion, and has important application prospects in the fieldof adsorption and separation.

Water-splitting devices and methods for manufacturing water-splitting devices or solar cells is disclosed. The method seeks to provide a relatively high-volume, low-cost mass-production method. In one example, the method facilitates simultaneous co-assembly of one or more sub-units and two or more polymer films or sheets to form a water-splitting device. According to another aspect, there is provided an improved water-splitting device. In one example form, there is provided a water-splitting device which includes a first electrode for producing oxygen gas and a second electrode for producing hydrogen gas from water. The first electrode and the second electrode are positioned between a first outer polymer layer and a second outer polymer layer, and at least one spacer layer is positioned between the first outer polymer layer and the second outer polymer layer.

Asymmetric organic-inorganic films and methods for forming and using such films. For example, the films are used as membranes for selective separation applications. The methods combine co-assembly of block copolymer (BCP) and inorganic nanoparticles (NPs), such as, for example, titanium dioxide (TiO₂), with non-solvent induced phase separation. The resulting films exhibit structural asymmetry. For example, the films have a thin nanoporous surface layer on top of a macroporous finger-like support layer. Parameters that may dictate membrane morphology include the fraction of inorganic nanoparticles used and the length of time allowed for surface layer development. In filtration tests, the resulting membranes show both desirable selectivity and permeability. The synthesis methods for hybrid membranes provide a new self-assembly platform upon which multi-functional and high-performance organic-inorganic membranes can be formed.

An optical lens molding apparatus comprising a first mold core, a second mold core, two internal sleeves and an external sleeve is provided. The first and the second mold core have a first coefficient of thermal expansion. The two internal sleeves are co-axially assembled with the first mold core and the second mold core respectively and have a second coefficient of thermal expansion. Furthermore, the external sleeve has a first inner diameter and a second inner diameter. The first mold core and the second mold core are co-axially assembled into the external sleeve having the first inner diameter such that a cavity is formed between the two mold cores. The two internal sleeves are co-axially assembled into the external sleeve having the second inner diameter. The external sleeve has a third coefficient of thermal expansion smaller than the first and the second coefficient of expansion.

The invention relates to a process for preparing mesoporous silicon oxide nano spherical carrier material, which comprises using ultrasonic technology, using ammonia as catalyst, using cationic surface active agent as structure guiding agent, carrying out co-assembly with inorganic silicon material in mixed solvent of organic solvent and water, thus obtaining nano-size homogeneous spheres with mesopourous ordered structure, then removing the surface active agent.

The invention provides three-dimensional structure composite aerogel and a preparation method thereof. The three-dimensional structure composite aerogel is formed by ascorbic acid, copper nanowire, oxidized graphene and water, and the mass ratio of the ascorbic acid, the copper nanowire and the oxidized graphene is 2-20: 0.01-200:1. The ascorbic acid is added in mixed solution to effectively restrain oxidation of the copper nanowire in the chemical reduction co-assembly process, and the oxidation problem of the copper nanowire in the chemical reduction co-assembly process with the oxidized grapheme is solved; the diameter of the copper nanowire is small, and the surface energy is strong, so that the copper nanowire easily gathers in aqueous solution. The oxidized graphene, known as surfactant, is equipped with a unique two-dimensional structure and physical properties, and is capable of adsorbing the copper nanowire through the interaction with the copper nanowire, restraining gathering of the copper nanowire, and promoting dispersal of the copper nanowire to solve the problem of dispersal of the copper nanowire.

The invention discloses an in-situ co-assembly synthesis adsorption-photocatalytic composite material based on UIO-66 and copper nanowires. The composite material is prepared by the following steps: (1) preparing the copper nanowires by using a mature method in advance; (2) ultrasonically dissolving a certain amount of the copper nanowires in N,N-dimethyl formamide to obtain a solution A; (3) adding ligand-terephthalic acid used for synthesizing MOF into the solution A, carrying out ultrasonic treatment, and stirring to obtain a solution B; (4) adding a precursor of zirconium into the solution B, carrying out ultrasonic treatment, and stirring to obtain a solution C; (5) putting the solution C into microwave, and reacting for a period of time so as to obtain UIO-66-Cu.

The invention relates to a method for measuring the relative absorption constants of molecules to be measured, such as dye, an antibody, a medicament, a medicament prosoma, and the like on polypeptide molecules by utilizing a STM (Scanning Tunneling Microscopy) technology. The method comprises the following steps of: acquiring an STM image of the self-assembly structure of the polypeptide molecules or acquiring an STM image of the co-assembly structure of polypeptide-labeled molecules through co-absorption with labeled molecules, adding molecules to be measured, such as the dye, the antibody, the medicament, the medicament prosoma, and the like to acquire the combination sites and the absorption quantity of the molecules to be measured on polypeptide and search the interaction of the polypeptide and the molecules to be measured on a molecule level; and measuring the relative absorption constants of the molecules to be measured on the polypeptide. The method provided by the invention is very significant to the analysis of the interaction mode and the combination essence of the target protein and the medicament.

The invention discloses a preparation method of a BiOBr/black phosphorus alkene hetero-junction nano composite material. The method adopts hydroxyl induction assisted solvothermal interface co-assembly to prepare the BiOBr/black phosphorus alkene hetero-junction nano composite material. The technical method includes the following steps of taking Bi(NO3)3*5H2O and KBr as raw materials and ethyleneglycol as a solvent, and adopting a solvothermal reaction to prepare the flower-shaped BiOBr; taking a black phosphorus block as a raw material and NMP as a solvent, and adopting ultrasonic strippingwith vacuum drying to prepare black phosphorus alkene; and preforming solvent heat treatment on the BiOBr and the black phosphazene in an ethanol solvent, and utilizing the hydroxyl induction assisted solvothermal interface co-assembly to prepare the BiOBr/black phosphazene hetero-junction nano composite material. The method has the advantages of simple preparation process and low production cost, and the obtained BiOBr/black phosphazene heterojunction nano composite material has strong visible light response capability, good interface coupling property and the advantages of direct Z-type hetero-junction, so that the method is expected to be applied to photo-catalytic components to degrade organic pollutants.

The invention discloses a preparation method and application of a covalent organic framework material containing acylhydrazone bonds and disulfide bonds. The preparation method comprises the followingsteps: using 4, 4'-dithiodibenzoylhydrazide and 1, 3, 5-benzenetricarboxaldehyde as building units, using a mixed solution of mesitylene and dioxane as a solvent, and using acetic acid as a catalystto react at 100-150 DEG C for 24-72 h through a solvothermal method to obtain the covalent organic framework material, wherein the reaction is as shown in the following formula. The material has a porous structure with a covalent organic framework, a specific surface area (BET) of 300-350 m<2>/g, and relatively high drug loading capacity for antitumor hydrophobic drugs such as doxorubicin or paclitaxel; the prepared covalent organic framework material and a polymer surfactant can form a stable nanostructure through ultrasonic co-assembly; and the material can decompose and release loaded drugsin acidic and reductive microenvironments, and has relatively high application prospects in antitumor drug delivery and other aspects.

The invention discloses a preparation method of a fluorescent cholesteric cellulose nanocrystal film with acid-base gas response. The preparation method comprises the following steps: 1) preparing a cellulose nanocrystal suspension; 2) synthesizing an AIE type organic small-molecule fluorescent material; 3) preparing an AIE type fluorescent suspension; 4) mixing the cellulose nanocrystal suspension with the AIE type organic small-molecule fluorescent material, and performing magnetic stirring and ultrasonic treatment; 5) performing an evaporation-induced co-assembly process to obtain a fluorescent cellulose film with a cholesteric structure. According to the preparation method disclosed by the invention, the problem in phase separation of the cellulose nanocrystal and the water-insoluble organic small-molecule fluorescent material is solved, then the cholesteric structure is maintained, and a fluorescent color film with a periodic structure is prepared successfully. The composite filmwith fluorescence characteristic and cholesteric structure shows the change among a plurality of optical characteristics of fluorescence, visible light and circularly polarized light in acid and baseatmospheres, and can be accurately and efficiently used for detecting acid and base gases and can be recycled.

The invention provides a porphyrin nanocomposite with tumor targeting function and a preparation method and application thereof, belonging to the technical field of material chemistry and bio-nano medicine. The invention provides a preparation method of a porphyrin nanocomposite with tumor targeting function, wherein gadolinium acetylacetonate porphyrin and tetraphenylzinc porphyrin are used for driving two hydrophobic porphyrin components to carry out co-assembly by using a co-assembly strategy, and the obtained porphyrin nanocomposite exhibits high photodynamic therapy efficiency and MRI imaging efficiency. Meanwhile, the porphyrin nanocomposites also modified HeLa cell membrane fragments to enhance tumor targeting function and enhance HeLa cell uptake. The porphyrin nanocomposite provided by the invention can be used as an excellent photosensitizer and/or contrast agent.

The invention relates to a controllable preparation method of a porphyrin/SiO2 co-assembly nano composite material for photodynamic therapy. The method comprises the following steps: (1) preparing a mixed solution of tetrapyridyl zinc porphyrin and hydrochloric acid, an MTAB aqueous solution and a methanol tetraethyl orthosilicate solution; (2), adding the mixed solution of the tetrapyridyl zinc porphyrin and HCl into an MTAB aqueous solution containing a NaOH solution under a stirring condition, wherein the pH of the mixed solution is 4.0 to 5.3; (3) dropwise adding the methanol tetraethyl orthosilicate solution into the solution in the step (2) every 10 to 20 minutes, and adding all methanol tetraethyl orthosilicate solution within 3 to 4 hours; and (4) stirring a reaction solution obtained in the step (3) for 40 to 50 h at a room temperature, centrifugally separating, and obtaining precipitates, i.e. the porphyrin/SiO2 co-assembly nano composite material. After the targeted modification by folic acid, the prepared composite material has an effect for accumulating rapidly-proliferated cells in priority, has excellent fluorescent imaging positioning capacity, has high photo therapy efficiency and the like.

The invention relates to a preparation method of a metal photonic crystal material, belonging to the preparation field of inorganic nano materials. The method comprises the steps of: preparing a silicon dioxide reverse template material by taking colloid microspheres as a template material; preparing silicon dioxide inverse opal structure by a co-assembly method; then carrying out reduction reaction by using steam of dimethylaminoborane, wherein an alcohol solution of chloroauric acid and chloroplatinic acid are taken as a gold source and a platinum source; and finally synthesizing the metal photonic crystal material. The technical scheme in the invention is novel and reasonable in design, wide in application scope, simple in operation, easy to control in reaction, good in repeatability, free from pollution and good in safety. The prepared metal photonic crystal material is even in order within hundreds of microns, and is good in optical property.

The invention discloses a multifunctional coating applicable to a medical implantable device and belongs to the technical field of coating materials. A method comprises steps as follows: firstly, an amphiphilic functional zwitterionic copolymer is synthesized, a tannic acid ethanol solution is dropwise added to zwitterionic random copolymer ethanol under the stirring condition, and a compound colloidal solution is formed through co-assembly; finally, the compound colloidal solution is taken as an electrolyte solution, and a nanocoating is prepared on the surface of a medical alloy with an electrophoretic deposition technology. The method is simple and convenient to operate and applicable to a wide substrate range; by means of the coating, cell adhesion and proliferation are improved, meanwhile, the coating has better antifouling capability, has a good adhesion inhibiting function on escherichia coli, staphylococcus aureus, protein and the like, has certain bactericidal activity to killbound bacteria and is expected to be applied to the fields of bone substitute repairing materials, organ and cavity scaffolds and the like.

The invention discloses a motor stator-rotor co-assembly device and method. The motor stator-rotor co-assembly device comprises a stator displacement device for driving a stator to rotate to change the axial direction of the stator, a grabbing hanger for hanging a rotor and a bolt automatic tightening device for automatically tightening a connecting bolt between a rotor end cover and a stator stock, wherein the stator displacement device is connected with the stator stock; the grabbing hanger is connected with a rotor shaft extending end; the bolt automatic tightening device is in matched connection with the connecting bolt; the rotor is assembled to the stator along with tightening of the connecting bolt; and the rotor end cover is in interference fit with the stator stock along with tightening of the connecting bolt. Automatic transposition of the stator and positioning after transposition can be realized, the stator and the rotor are ensured to complete vertical co-assembly along avertical direction, when the connecting bolt is completely tightened, stator-rotor co-assembly is realized, interference fit assembly between the rotor end cover and the stator stock is also realized,and the stator-rotor co-assembly automation level is improved, and the universality and the practicability are high.