750 results about "Self-assembly" patented technology

The invention provides a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell comprises a first electrode, a hole transport layer, a perovskite layer, an electron transport layer and a second electrode which are stacked in sequence. The material of the hole transport layer comprises a biomolecular material which is fixed on a self-assembly monomolecular layer material through an intermolecular force, and the biomolecular material comprises one or more of guanine, adenine, thymine, uracil, cytosine, hydroxymethylcytosine, xanthine, hypoxanthine, 6-mercaptopurine and corrin. According to the perovskite cell provided by the invention, the biomolecular material with a plurality of nitrogen heterocyclic structures and amino groups is added to generate multipoint hydrogen-bond interaction and pi-pi accumulation with the tail end of the SAM, so that the orderliness of molecular arrangement is improved, and the dipole direction and strength of the whole interface are regulated and controlled; and a coordination bond or hydrogen bond network is formed by the coordination compound and uncoordinated cations or anions in perovskite, so that interface defects are effectively passivated, and the thermal stability and the humid and hot life of a device are enhanced.

The invention discloses a preparation method and application of an amino-functionalized graphene quantum dot modified MXene loose nanofiltration membrane. The preparation method comprises the following steps: mixing an MXene nanosheet dispersion liquid with an aminated graphene quantum dot aqueous solution, and preparing an amino functionalized graphene quantum dot / MXene mixed dispersion liquid by adopting a self-assembly method; and filtering and depositing the obtained mixed dispersion liquid on the modified base membrane to obtain the MXene loose nanofiltration membrane. According to the preparation method disclosed by the invention, the zero-dimensional aminated graphene quantum dots are creatively embedded into the MXene nanosheets, so that the MXene loose nanofiltration membrane which is stable in structure and regular in stacking is prepared. The nanofiltration membrane has good separation performance on different dyes and inorganic salts while effectively inhibiting water swelling, is a next-generation separation membrane with high stability and high selectivity, is mild and simple in preparation process, and has a wide application prospect.

The invention belongs to the technical field of biomedical materials and regenerative medicine, and relates to collagen-based injectable fiber hydrogel as well as a preparation method and application thereof. According to the injectable fiber hydrogel, methacrylated collagen and dithiothreitol are subjected to a thiol-ene click reaction rapidly under the action of a photoinitiator through illumination, a primary cross-linked network is formed, and the injection and in-situ gel forming requirements are met; then under the conditions that the pH is 6.5-8.0 and the temperature is 30-39 DEG C, collagen molecules are self-assembled into a nanofiber structure, and a bionic network similar to a natural extracellular matrix is obtained. The hydrogel disclosed by the invention has the advantages of rapid gelation, structural biomimetic property and biological activity; residual sulfydryl endows the hydrogel with active oxygen scavenging capacity, so that oxidative stress can be relieved, and immune response can be regulated; the fibrotic structure promotes cell adhesion, migration and tissue regeneration.

The present disclosure belongs to the technical field of microorganisms, and in particular relates to a nano-coated growth-promoting bacterial agent and a composite growth-promoting bacterial agent, preparation methods and use thereof. The nano-coated growth-promoting bacterial agent includes a growth-promoting bacterial agent and a nano-coating formed by self-assembly of a plant-derived polyphenol and a soluble multivalent metal ion on the surface of the growth-promoting bacterial agent. The key to the present disclosure is to employ the plant-derived polyphenol and the soluble multivalent metal ion to self-assemble on the surface of the growth-promoting bacterial agent to form a nano-coating. Based on the interaction of the growth-promoting bacterial agent with the phyllosphere, the leaf face adhesion performance of the growth-promoting bacterial agent is significantly enhanced, the loss rate of the growth-promoting bacterial agent under rainfall erosion is effectively reduced, and the survival rate and colonization of the growth-promoting bacterial agent in the phyllosphere are enhanced.

The invention relates to the technical field of semiconductor photoetching, and discloses a super-resolution photoetching and guided self-assembly-based graphic structure preparation method, which comprises the following steps of: S1, forming a guide layer, a reflective metal layer and a photosensitive film layer which are sequentially stacked on a substrate; s2, exposing and developing the photosensitive film layer by adopting super-resolution photoetching equipment, and forming a photoetching pattern on the photosensitive film layer; s3, the reflective metal layer and the guide layer are sequentially etched to the upper surface of the substrate, and the photoetching pattern is transmitted to the guide layer; s4, taking the photoetching pattern as a guide structure, and coating a molecular brush material in a groove of the guide structure to form an affinity polymer layer; s5, the groove of the guide structure is internally coated with a block copolymer, and after annealing, guide self-assembly is conducted to form a block copolymer layer; and S6, selectively removing part of the polymer block region to obtain a graphic structure. According to the method, a super-resolution photoetching process is combined with guided self-assembly of the block copolymer, so that higher process expansion is realized, and a graphic structure with the resolution within 20nm is obtained.

The invention discloses a mechanical property regulation and control method of an aromatic microcapsule, and belongs to the technical field of microcapsules. The preparation process of the microcapsule comprises the following steps: self-assembling CNC and an amino-functionalized polymer ligand on an oil-water interface to form a stable Pickering emulsion. Wall materials are deposited on the surfaces of emulsion droplets in situ, the CNC interface coverage rate is regulated and controlled by adjusting parameters such as the ligand concentration and the emulsion water phase pH value, and then a series of aromatic microcapsules with different mechanical properties are prepared. In addition, the functional microcapsules can be designed in a customized manner according to different application requirements, and good application prospects are shown.

The invention relates to the technical field of metal organic framework materials (MOF) and isotope separation, in particular to a functionalized metal organic framework material for water / heavy water separation and a preparation method and application thereof. The metal organic framework material is a porous crystal material which is formed by coordination self-assembly of metal ions and V-shaped organic ligands and has a periodic network structure; the V-shaped organic ligand is a V-shaped dicarboxylic acid organic ligand modified by an oxygen-containing functional group designed through topological functionalization. According to the metal organic framework material, through topological functional design of a V-shaped organic ligand, a space confinement channel and a high-density oxygen active site are integrated in the same MOF material, and an ideal model system is provided for identification of water isotopes; according to the metal organic framework material, the framework structure flexibility, the pore channel confinement effect and the molecular recognition capability can be synergistically regulated and controlled, so that efficient recognition and separation of water / heavy water are realized.

The invention relates to a perovskite solar cell, a preparation method thereof and a photovoltaic module. The perovskite solar cell comprises a hole transport layer, the hole transport layer comprises a metal oxide layer, and the grain size of the metal oxide layer is 5-10 nm; the self-assembly molecular layer is arranged on the first surface of the metal oxide layer, and the hydroxyl coverage rate of the first surface is 7%-25%. According to the perovskite solar cell, the defects of the hole transport layer and the defects of the self-assembly molecular layer can be improved at the same time, and the film layer binding force between the hole transport layer and the self-assembly molecular layer is enhanced, so that the carrier transport efficiency in the perovskite solar cell is effectively improved, and the photoelectric property is improved.

The invention relates to a nano groove array and a manufacturing method and application thereof, and the manufacturing method of the nano groove array comprises the following steps: taking single-stranded DNA (ssDNA) as a DNA brick, and carrying out self-assembly by adopting a complementary pairing principle of the ssDNA to obtain the nano groove array with a base and a side wall; wherein the width and the height of the nano groove array are fixed, the number of grooves is determined, and the nano groove array extends along a single direction; in the nano groove array, the width of the side wall and the width of the groove are equivalent to the diameter of two double-helix DNA (dsDNA). Compared with the prior art, the number of the grooves of the nano groove array is controllable, the width of the grooves is 4 nm, the period of the groove array is 8 nm, and the self-assembly defect can be greatly reduced.

This invention discloses a protein-polysaccharide ternary nanoparticle loaded with cordycepin, its preparation method, and its applications. The invention employs a layer-by-layer self-assembly method to modify the surface of zein nanoparticles. Since zein has a positive surface charge, the first layer modification uses the anionic polysaccharide sodium alginate for electrostatic bonding, and the second layer modification uses the cationic polysaccharide chitosan, constructing positively charged ternary composite nanoparticles. These nanoparticles have small particle size, high encapsulation efficiency, high drug loading capacity, and a sustained-release effect, significantly reducing cytotoxicity and significantly improving the therapeutic effect on osteoarthritis. This invention develops a novel cordycepin formulation, overcoming the limitations of cordycepin's clinical use.

The invention relates to a sulfonic group modified ZIF-67 coated diaphragm as well as a preparation method and application thereof, and belongs to the technical field of lithium batteries. Comprising a porous base membrane and a modified coating coated on one side or two sides of the porous base membrane, and the modified coating comprises sulfonic group functionalized ZIF-67 nanoparticles and a binder, the sulfonic group functionalized ZIF-67 nanoparticles are a metal organic framework material formed by coordination self-assembly of a cobalt source, a 2-methylimidazole ligand and an imidazole auxiliary ligand containing a sulfonic acid group. Imidazole ligands with sulfonic acid groups are introduced into a ZIF-67 framework through in-situ coordination self-assembly, homogenization of lithium ion flux is achieved through regular pore channels of ZIF-67, meanwhile, anion decomposition is promoted through the electrostatic induction effect of the sulfonic acid groups, and the lithium ion transference number is increased. The diaphragm can effectively inhibit the growth of lithium dendrites, and shows excellent cycling stability and rate capability in an NCM811 / Li metal total battery, a Li-Li symmetric battery and a Li-Cu half battery.

The invention discloses preparation of a nitrogen-rich ionic organic single crystal material and application of the nitrogen-rich ionic organic single crystal material in iodine adsorption, and belongs to the technical field of functional materials and radioactive pollutant treatment. The material is formed by self-assembly at room temperature through a solution method by taking biphenyl tetracarboxylic acid tetrabutylamine as an anion ligand and tetra (4-ethyl pyridine phenyl) ethylene bromide or tetra (4-imidazole phenyl) ethylene bromide as a cation ligand. The method is simple in preparation process, mild in condition and high in yield. The skeleton of the obtained material is rich in nitrogen sites and has a large cavity, the material shows extremely high adsorption capacity and rapid adsorption kinetics for iodine in a gas phase and a liquid phase, the maximum adsorption capacity of the material for iodine steam reaches up to 5.16 g / g, the retention rate of 95% or above can still be kept within 7 days after adsorption, and the material has good recycling performance. The material provides a novel and reliable solution for efficiently capturing and fixing radioactive iodine, and has a wide application prospect in the field of nuclear waste treatment.

The invention discloses a covalently bridged bicontinuous hard carbon negative electrode material and a preparation method and application thereof, and belongs to the field of electrochemical energy storage materials. According to the method, the limitation of a biomass hard carbon long-range disordered structure is broken through through a template-self-assembly-reconstruction three-section reaction, atomic-scale synergy of electrons and ions is realized in a hard carbon matrix, and in-situ mechanical interlocking and chemical bridging between heteroatom doped carbon dots and a hard carbon matrix graphite domain are enhanced by utilizing the design of a precursor; topological reconstruction of a carbon skeleton is triggered through pickling purification and a high-temperature carbonization process, and accurate fusion of C-C covalent bonds is realized. The graphitized nano domain grown in the process provides a rapid transmission channel for electrons, generated topological defects and heteroatoms provide a rapid transmission channel for adsorption and surface migration of sodium ions, and the prepared material shows excellent reversible capacity, first coulombic efficiency and rate capability.

The application discloses a kind of compound fertilizer with nitrogen fertilizer slow-release and biocontrol function and preparation method, it is related to microbial compound fertilizer field, including the following components: nitrogen source carrier, physical net trapping material, 3,4-dimethyl pyrazole phosphate, biocontrol component, binder.A kind of preparation method, including the following steps: after silanization modification treatment is carried out to attapulgite, with polyglutamic acid aqueous solution mixed reaction, obtain self-assembly gel;Bacillus subtilis is embedded and handled, rhamnolipid is pre-emulsified, chitosan oligosaccharide is crosslinked with boric acid treatment, and is blended;Nitrogen source carrier is heated to melt, add self-assembly gel, mix evenly;Temperature control, add 3,4-dimethyl pyrazole phosphate, and keep warm reaction;Cooling, add the blend obtained in step S200, binder, mix evenly;Extrusion granulation, after fluidized bed drying, slow-release coating is carried out, and the target compound fertilizer is obtained.The application makes disease control efficiency to improve to 89.2%, and blocks nitrosomonas AMO enzyme activity for 120 days.

The invention provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell at least comprises a conductive substrate, a hole transport layer, a perovskite active layer and an electrode layer which are stacked, the material of the hole transport layer comprises a self-assembly material and a doping material; the doping material comprises hydrochloride of boric acid phenyl ammonium. Hydrochloride of boric acid phenyl ammonium is doped into existing self-assembly molecules, on one hand, wettability of the hole transport layer can be improved, and on the other hand, nitrogen atoms on ammonium radicals on the hydrochloride of boric acid phenyl ammonium can serve as Lewis base to conduct passivation modification on the perovskite active layer.

The invention discloses an oligomeric amino acid dendritic macromolecular material as well as a preparation method and application thereof, and relates to the technical field of nano materials. The general formula of the oligomeric amino acid dendritic macromolecular material is TPE-(PEG) n-(Lys) x-(Arg) y, wherein TPE is a hydrophobic core, has an aggregation-induced emission characteristic, and can enhance the self-assembly capability and the tracing function of the nano-carrier; pEG is a connecting arm, so that the water solubility and biocompatibility of the material can be improved; lys is a branch skeleton and is a main construction unit of a dendritic macromolecule; arg is a functional terminal, guanidyl of Arg has strong positive charges, electrostatic binding with negatively charged nucleic acid can be promoted, and meanwhile cellular uptake can be enhanced possibly through the membrane penetration effect. The oligomeric amino acid dendritic macromolecular material gives consideration to stability, modifiability and targeting, provides a new scheme for small nucleic acid delivery, and is expected to have far-reaching influence in the fields of precise tumor treatment, gene therapy and multi-modal diagnosis and treatment.

The invention discloses cysteine mediated Hf / Cu bimetal synergistic self-assembled nano-particles as well as a preparation method and application of the cysteine mediated Hf / Cu bimetal synergistic self-assembled nano-particles. According to the method, cysteine is used as a multifunctional ligand, carboxyl and sulfydryl of cysteine are in bridge connection with metal through coordination, ligand chelation and assembly guiding effects are synchronously exerted, bimetallic ions are induced to be cooperatively self-assembled in an alkaline system (pH is 9-10), and metal cysteine self-assembled nanoparticles with uniform structures are formed through in-situ nucleation and multistage aggregation. According to the method, the ligand function and the bimetallic synergistic effect are accurately matched, the synthesis process is mild (room temperature), the operation is simple and convenient, and the product is excellent in dispersity and stability. Meanwhile, a close coordination structure constructed by cysteine provides a key channel for energy / electron transfer from sensitizing metal to Cu under X-ray irradiation, and lays a structural foundation for subsequent catalytic effect enhancement.

The invention relates to ink and a light-emitting device. The ink comprises a solvent, and an organic luminescent material and a discotic liquid crystal material which are dispersed in the solvent. According to the ink, the wettability of the ink on the surface of a substrate can be improved by adding the discotic liquid crystal material, the substrate can be more uniformly coated with the ink, the uniformity of a thin film is enhanced, and the discotic liquid crystal material has self-assembly capacity and can promote molecular arrangement and accumulation in the thin film forming process, so that the compactness and quality of the thin film are improved.

The invention provides a collagen nano dispersion preparation as well as a preparation method and application thereof. The preparation method of the collagen nano dispersion preparation comprises the following steps: S1, dissolving type I collagen and type III collagen in an acidic aqueous medium to prepare a collagen solution; s2, regulating and controlling the temperature, the pH value and the ionic strength of the collagen solution, so that the collagen solution is self-assembled; and S3, when the average particle size of the collagen fibers reaches a target range, performing dynamic freezing on the self-assembly system. The preparation and stable dispersion of the nano-scale collagen fiber can be realized without chemical crosslinking, the uniformity, biocompatibility and safety of the product are remarkably improved, and the nano-scale collagen fiber has excellent water-light effects and the like, and can be widely applied to the field of medical cosmetology.

The presently disclosed methods provide for preparing a stable hydrophobic self-assembled monolayer (SAM) coating, that includes preparing a SAM solution by combining a SAM compound with an initial solvent and an additional solvent and mixing, in a sealed container, the SAM solution at a first fixed temperature at a constant rotational speed for a first fixed time interval. The SAM coating is then prepared by treating a substrate to achieve pristine state, and heating the substrate at a second fixed temperature for a second fixed time interval. Then within a sealed container, immersing the substrate in the SAM solution for a third fixed time interval. Following the completion of the third fixed time interval, the substrate is removed from the sealed container and treated with the initial solvent and the additional solvent to remove excess SAM material, and heated at a third fixed temperature.

This invention discloses a method for preparing lignin nanoparticles with uniform particle size and its applications. The method involves fully dissolving industrial lignin in an aqueous solution of inorganic salts in acetone, filtering, and then adding an aqueous solution of inorganic salts of the same concentration to complete self-assembly, resulting in a dispersion of lignin nanoparticles with uniform particle size. Centrifugation yields the lignin nanoparticles with uniform particle size. This invention provides a simple, easily controllable, and highly reproducible nanoparticle preparation method. Furthermore, compared to mechanical methods, interfacial crosslinking, and emulsion methods for preparing lignin nanoparticles, it offers advantages such as significantly shortened process flow and reduced costs, demonstrating potential for large-scale industrial production.

The invention provides an allosteric nanogel adjuvant as well as a preparation method and application thereof, and belongs to the technical field of vaccines. The allosteric nanogel adjuvant comprises a self-assembly motif, a responsive site and an immunomodulatory peptide fragment, and the self-assembly motif is composed of 2-5 amino acids; the allosteric nanogel adjuvant has a structure as shown in a formula I, and is named as NTP5 for short; the allosteric nanogel adjuvant is self-assembled into nanoparticles, the nanoparticles are allosteric into a nanofiber structure through responsive broken bonds, nanogel is further formed, and the key problems of a traditional vaccine in the aspects of antigen delivery and immune activation are effectively solved. The nanogel adjuvant can efficiently load various antigens to form a stable nano vaccine, activate an immune microenvironment and provide more means and thoughts for vaccine development.

The invention relates to the technical field of sodium ion battery materials, in particular to a preparation method of a biomass derived sulfonated cellulose centrifugal self-assembly synthesized spheroidal hard carbon material, which comprises the following steps: mixing a pretreated biomass material with an alkaline solvent to prepare hydroxylated cellulose; the hydroxylated cellulose and a sulfonating agent are mixed and subjected to a sufficient sulfonation reaction, and sulfonated cellulose is obtained through vacuum drying; the sulfonating agent is at least one of concentrated sulfuric acid, sodium hydrogen sulfite and chlorosulfonic acid; sulfonated cellulose is added into a metal salt solution for cross-linking assembly, a precursor material with a sphere-like structure is formed under the induction action of a centrifugal force field, and the metal salt solution is any one of soluble iron, cobalt and nickel salt solutions; and carrying out low-temperature carbonization, purification treatment and high-temperature carbonization on the precursor material to obtain the biomass-derived spheroidal hard carbon material. The spheroidal hard carbon material obtained by the method is low in specific surface area and high in tap density.

This invention provides a bamboo-like carbon nanotube with a heterostructure, its preparation method, and its applications. The preparation method includes: dissolving cobalt nitrate and heteropolyacid in ethanol to obtain a first solution; dissolving dicyandiamide in a mixed solution of ethanol and water to obtain a second solution; mixing phytic acid with the second solution uniformly and performing a polymerization reaction to obtain a third solution; adding the first solution to the third solution to perform a chemically induced self-assembly reaction, washing and drying to obtain a dicyandiamide-heteropolyacid-phytic acid-cobalt ion organic polymer; and calcining to obtain the bamboo-like carbon nanotube with a heterostructure. This method is simple and inexpensive; the Co2P and WN / MoN nanoparticles in the bamboo-like carbon nanotube are uniformly distributed in the carbon matrix, improving the electrochemical performance of the material; the introduction of dicyandiamide and phytic acid enables nitrogen and phosphorus doping of the carbon framework, improving the conductivity of the carbon support; and the resulting product exhibits high capacity and excellent cycle stability as a cathode material for metal-air batteries.

This invention relates to the field of biopharmaceutical manufacturing technology, and discloses a BCMA-targeting nanobody, its preparation method, and its application. The nanobody comprises a heavy chain single-domain binding domain, a helical conformation-constrained peptide chain, and an amphiphilic self-assembled polypeptide sequence. The helical conformation-constrained peptide chain forms a steric barrier between the binding domain and the polypeptide sequence through physical length, maintaining the monomeric conformation of the polypeptide sequence in a free state. When the binding domain is anchored at the receptor binding interface, the conformation-constrained peptide chain increases the local effective concentration of the polypeptide sequence within the confined space, inducing intermolecular topological assembly. This invention utilizes a kinetic phase transition mechanism to generate a binding state jump, maintaining the conformational activity of the composition in the circulatory system, reducing off-target toxicity, and prolonging the residence time at the receptor interface.

The application discloses an adsorbent for removing trace metal ions in alcohol ether solvents and a preparation method and application thereof, and belongs to the field of chemical separation technology. The adsorbent is a zirconium-based metal organic cage material with discrete structure formed by coordination self-assembly of a zirconium metal salt and a nitrogen-containing polycarboxylic acid organic ligand. The adsorbent has specific ion nanowells, and can form a strong limited synergistic effect with metal ions. The adsorbent is suitable for adsorption and separation of trace metal ions in various alcohol ether solvents, and has high metal ion adsorption and removal efficiency.

The invention discloses a trans-perovskite solar cell based on double boric acid group anchoring and a preparation method thereof. The solar cell comprises a substrate, an anode, a hole transport layer, a co-self-assembly molecular layer, a perovskite light absorption layer, an electron transport layer and a cathode which are stacked. The co-self-assembly molecular layer comprises a first self-assembly molecule and a second self-assembly molecule of an organic compound containing two boric acid anchoring groups and a conjugated skeleton; the conjugated skeleton has at least: an extended conjugated structure including an aryl group, a biaryl group, a plurality of aryl groups bridged by heteroatoms, a heteroaryl group, and a plurality of heteroaryl groups connected by chemical bonds; the regulating group comprises an atom or a group for providing lone pair electrons, or a substituent containing a halogen atom. According to the invention, collaborative optimization of the interface stability, the carrier extraction efficiency and the interface functionality is realized through the co-self-assembly molecular layer, and the photoelectric conversion performance and the stability of the solar cell are improved.

The invention relates to the technical field of separation membranes, in particular to a self-assembled ion separation membrane based on a pillararene derivative and a preparation method of the self-assembled ion separation membrane. The pillararene derivative and the triaminoguanidine hydrochloride are respectively dissolved, so that the problems of instant precipitation and phase separation easily caused by direct mixing are effectively avoided. Meanwhile, two functional monomers are ultrasonically dispersed, so that the problem of molecular agglomeration in the mixing process is avoided, the uniformity of reaction liquid is ensured, and a foundation is laid for subsequently forming a flawless separation membrane. The pillararene derivative contained in the separation membrane structure provides a macrocyclic pore structure with ion recognition capability, and triaminoguanidine hydrochloride acts on sites through multiple hydrogen bonds / ionic bonds, so that the selective separation performance of the membrane is further enhanced. Due to the collaborative design of the material, the material has precise molecular recognition capability and adjustable aperture, and can realize efficient selective separation of target objects such as small organic molecules, ions or dyes.