108results about How to "Achieve self-assembly" patented technology

The invention discloses a preparation method of graphene-coated silicon dioxide nanoparticles. Graphite powder is taken as a raw material, graphene oxide with oxygen-containing functional groups is prepared with an improved Hummers method, the silicon dioxide nanoparticles are prepared with a hydrothermal method, a proper quantity of silane coupling agents are added to a solution containing silicon dioxide and uniformly stirred, the silane coupling agents are attached to the surfaces of silicon dioxide particles, and surface-modified silicon dioxide particles are obtained; graphene oxide is added to the modified silicon dioxide solution, and surfaces of the silicon dioxide particles are completely coated with graphene oxide under the interaction of functional groups. Finally, a reducing agent is added to the solution, graphene is formed by further removing the oxygen-containing functional groups of graphene oxide, and a composite with graphene completely coating silicon dioxide is prepared. The method has the advantages that a process is simple, the reaction time is short, regulation is easy and the like. The prepared composite has the characteristics of regular structure, high porosity, low density, good hydrophobicity and the like.

The invention discloses a nucleic acid nano structure carrier, a nucleic acid nano structure carrier-precious metal photosensitive contrast agent composite comprising the same, and preparation methods and applications of the carrier and the composite. The nucleic acid nano structure is a random two-dimensional and/or three-dimensional nano structure constructed by a DNA paper-folding technology. The precious metal components are used to carry out DNA modification on the surface of the carrier and selected from one or more of gold nano rods, gold nano shells, silver-coated gold nano rods, and gold nano cages. The provided composite is used as a photo-acoustic imaging probe, is capable of guaranteeing the absorption contrast enhancing effect of the photo-acoustic contrast agent which is coupled to the composite, and moreover can prominently improve the targeting performance of the contrast agent on tumors. Furthermore, the precious metal photosensitive components which are coupled to the carrier are enriched in the inner of tumor tissues, and thus the solved is the problems that conventional contrast agent is distributed over the whole human body or the contrast agent can only stay on the tumor surfaces. The preparation method has the advantages of simple technology, low cost, convenience, and easy application.

The invention relates to a resistive flexible strain sensor based on drying-mediated self-assembly of colloidal particles into parallel cracks, and a preparation method of the resistive flexible strain sensor. The flexible strain sensor comprises a flexible substrate, a sensitive layer and a conductive layer which are arranged from bottom to top in sequence, wherein the flexible substrate is a thin film made of a flexible material; the sensitive layer is prepared from a thin film produced through drying of colloidal dispersions, and the upper surface of the sensitive layer is provided with a regular crack array structure; a pair of copper sheet electrodes are arranged on the conductive layer, and are respectively located at the two ends of the conductive layer; and an enameled wire is ledout of each electrode. The flexible strain sensor provided by the invention can be adhered to the surface of human skin or attached to clothes to achieve wearable monitoring of respiration, pulses, gaits, joint movements and the like of a human body; and through the drying-mediated method, the colloidal particles are self-assembled into the parallel cracks, so that the flexible strain sensor has the characteristics of high sensitivity, high speed and high efficiency of a preparation process, high simplicity and environmental friendliness of a preparation technique, high convenience in mass production, low cost and the like, and achieves broad application prospects.

The application relates to a preparation method of a two-dimensional metal organic framework (MOF)/ carbon oxide material composite thin film. The application further relates to a two-dimensional metal organic framework (MOF)/ carbon oxide material composite thin film. Besides, the application further relates to an application of the two-dimensional metal organic framework (MOF)/ carbon oxide material composite thin film in absorbing radioactive nuclei waste fluid. The invention has the beneficial effects of simple operation and strong repeatability; graphene oxide and MOF can be self-assembled by height layer by layer. Besides, the composite thin film can realize ultra-strong absorbing ability, and the simple method is universally applicable to the compounding of the two-dimensional metalorganic framework containing different center metal ions and the carbon oxide material. These high-quality two-dimensional MOF/carbon oxide composite materials have huge application value in absorption, separation and catalyst domains.

The invention belongs to the technical field of biology, and relates to a preparation method and application of shewanella spp-nanometer ferrous sulfide capsules. The method comprises the steps that an LB culturing medium and an M9 culturing medium are prepared, shewanella spp is inoculated to the LB culturing medium for culturing, and bacterial liquid is obtained; the LB culturing medium and theM9 culturing medium are mixed, sodium lactate, calcium chloride and magnesium sulfate are added, and reaction buffering liquid is obtained; then, the bacterial liquid is centrifuged, bacterial sludgeis added into the reaction buffering liquid until the OD 600 value is 0.05-5; then, a ferric chloride solution and a sodium thiosulfate solution are added into the reaction buffering liquid after inoculation of the bacterial sludge, and after culturing, centrifugation, washing and resuspending, the shewanella spp-nanometer ferrous sulfide capsules are obtained; in the process of synthesizing the capsules, the activity of the biological metabolism mechanism is fully utilized, the raw materials are simple and cheap, the application cost is low, and quantization production can be achieved; multi-period efficient removal for hexavalent chromium is efficiently achieved, and a new method is provided for efficiently processing heavy metal pollution.

The invention discloses a nucleic acid nanostructure carrier, a stimuli-responsive type nucleic acid nanostructure carrier chiral noble metal nanocomposite comprising the same and a preparation method thereof and application. The nucleic acid nanostructure carrier is of two-triangular DNA paper folding structure constructed through a DNA paper folding technology, and the two triangular DNAs are connected through a control chain to form a rhombic paper folding structure. Concretely, the nucleic acid nanostructure carrier is of a nucleic acid nano-structure formed by self-assembly through hybridization of a scaffold chain and an auxiliary folding staple chain and hybridization of a control chain and the scaffold chain of the two-triangular DNA paper folding structure respectively. On the one hand, the stimuli-responsive type nucleic acid nanostructure carrier chiral noble metal nanocomposite overcomes shortcomings of optical signal modulation through a conventional plasma assembly (chain accumulation and limited adjustment range); on the other hand, a plasma structure is adjusted through an external environment, and the nucleic acid nanostructure carrier can be used for monitoring specific bioactive substances and the like.

The invention discloses a carbon-wrapped polyhedron silver nano-particle and a controllable self-assembly preparation method thereof. A one-step water heating technology is adopted, glucose serves as a reducing agent and a carbon source, and polyvinylpyrrolidone (PVP) serves as a morphological control agent for metallic silver growth and triggers self-assembly of composite particles. The method for preparing the carbon-wrapped polyhedron silver nano-particle comprises the following steps: sequentially dissolving 1.0-2.0g of glucose, 0.25-2.80g of PVP and 0.02-0.04g of silver nitrate in 100ml of deionized water, and ultrasonically dissolving a solid for 20 minutes until the solid is completely dissolved; transferring 40ml of mixed solution into a 50ml reaction kettle, performing constant-temperature reaction for 6 hours at a certain temperature of 160-200 DEG C, and cleaning and drying a product. According to the self-assembly of the composite nano-particles, other conditions are unchanged, the concentration of the PVP is increased to reach a certain value, and the suspension liquid of the cleaned product is directly added to the surface of a carbon film, a silicon chip or other carriers dropwise. The method has a simple process, is low in cost and easy to industrialize, and can be popularized to preparation and industrialized production of other core-shell structure nano-particles and self-assembly structures.

The invention discloses a display panel and a manufacturing method thereof, belonging to the technical field of display. The display panel comprises a driving substrate, a plurality of LED devices anda barrier layer and an electrode layer arranged on the driving substrate. The barrier layer comprises a barrier and a plurality of barrier openings arranged in an array, wherein the barrier openingsare separated by the barrier, and an LED device is arranged in one barrier opening; The LED device includes a first electrode and a second electrode, the first electrode and the second electrode are located on the same side of the LED device, and the second electrode is disposed around the first electrode; The electrode layer includes a ferromagnetic electrode and a lead wire positioned within thebaffle opening. Compared with the prior art, the assembly of the LED device on the driving substrate can be realized by energizing the lead wire, the transfer process is simple and easy to control, the efficiency is high, and the transfer head does not need to be made additionally, which is favorable for reducing the production cost of the product.

The invention discloses a polyethylene glycol grafted graphene oxide composite solid-solid phase change material. The main components comprise polyethylene glycol, a crosslinking agent and graphene oxide; the polyethylene glycol is subjected to tail end functionalized modification by the crosslinking agent; the polyethylene glycol and the graphene oxide form a mutually linked skeleton through electrostatic interaction between a hydrogen bond and a functional group; and the polyethylene glycol grafted graphene oxide composite solid-solid phase change material has a graphene layered structure. The preparation method comprises the following steps: 1) performing molecular chain tail end functionalized modification on the polyethylene glycol by the crosslinking agent; and 2) adding the grapheneoxide to perform self assembling and graft polymerization on the polyethylene glycol. Self assembling of the graphene oxide and graft polymerization of the polyethylene glycol are realized through molecular chain tail end functionalization, a composite phase change material with a graphene layered structure is formed, and the advantages of maintaining solid state in the phase change process, obviously improving phase change latent heat and having more excellent heat conductivity are achieved. Therefore, the polyethylene glycol grafted graphene oxide composite solid-solid phase change materialhas a wide application prospect in the field of phase change thermal storage.

The invention provides a graphite/manganous oxide composite electrode material. The composite electrode material is a graphite/manganous oxide composite electrode material with a nuclear shell structure; the nuclear shell is nanosphere, and the core of the nanosphere is manganous oxide with grain size less than 100nm; and the shell of the nanosphere is a graphite carbon layer with thickness less than 10nm. The invention also relates to a preparation method of the electrode material, a product of the electrode material, and application.

The invention relates to a polypeptide and chemotherapy drug combined drug-loaded micelle and a preparation method and an application thereof. Polypeptide with a tumor targeting therapeutical effect and a chemotherapy drug are combined to prepare the tumor-targeting polypeptide-PEGylated phospholipid complex-chemotherapy drug drug-loaded micelle; the polypeptide with the tumor targeting therapeutical effect is specifically combined with a chemotactic factor receptor CXCR4, the CXCR4 polypeptide antagonist is used for increasing a targeting penetration ability of the drug to tumor tissues, the PEGylated phospholipid micelle is used for increasing the drug biological stability and the drug loading amount, and compared with a single chemotherapy drug doxorubicin, the combined drug-loaded micelle shows a stronger characteristic of inhibiting tumor cell vitality. The polypeptide and chemotherapy drug combined drug-loaded micelle provides a feasible method and technique for improving the tumor therapeutic effect.

The invention provides albumin-loaded metalloporphyrin complex nano particles preparation method and an application thereof. The albumin-loaded metalloporphyrin complex nano particles take porphyrin,metal salt and albumin as raw materials, a solvent method is employed for preparing the albumin-loaded metalloporphyrin complex nano particles, the method is simple, operation is easy, repeatability is good, and the prepared albumin-loaded metalloporphyrin complex nano particles solve the problem of water solubility and targeting performance of a metal-based complex medicine; under supersonic waveeffect, the albumin-loaded metalloporphyrin complex nano particles have ultrasonic tumor cell killing effect, and a metal-based complex loaded on albumin molecules has a wide antineoplastic application prospect.

The invention discloses a transparent organic and inorganic hybridization heterojunction material and a preparation method thereof. According to the heterojunction material, alkylthrophene-pyridine copolymer which is used as a p-type semiconductor material and II-VI group inorganic nanocrystalline which is used as an n-type semiconductor material are assembled in a solution, and then a film is formed by a spin coating, casting or printing method; and room-temperature large-area forming can be realized. The prepared hybridization heterojunction is ordered in structure and high in light absorption efficiency, dispersion stability and interfacial compatibility. Films formed by the hybridization heterojunction materials are high in light transmission and can widely used as materials of various active coatings in semiconductor photoelectric devices.

The invention discloses a synthesis method of low-polyethylene-glycol functional amphiphilic pillar [5] arene compound (AP5-glycol), wherein AP5-glycol is self-assembled in water to form a vesicle, and the vesicle can generate responsive depolymerization (the vesicle becomes small or gradually disappears) after being affected by external physical stimulation such as heating, ultrasonic treatment, violent stirring and the like and can be rapidly formed again after the external stimulation is stopped, i.e., the two processes including vesicle formation and vesicle depolymerization are reversible and controllable. Therefore, the vesicle has excellent thermodynamic reversibility and controllability. In addition, KPF6 and benzo-18-crown-6 can be respectively used as a switch for depolymerizing and forming a vesicle self-assembly again. The characteristics can ensure that the vesicle has outstanding recyclability in application such as drug release or transfer and the like.

A synthetic method of an aluminium zinc phosphate nanocrystal adopts a direct synthetic method of low-heating solid-state chemical reaction, uses zinc salt powder, aluminium salt powder, and phosphate powder as raw materials, and comprises the following steps: adding a template, mixing and grinding under a condition with room temperature and normal pressure, allowing the reaction mixture to standat a temperature from room temperature to 90 DEG C, washing the reaction mixture with water to remove by products of soluble inorganic salts, filtering, drying the filter cake at 100 DEG C to obtain a product of a zinc phosphate nanocrystal with a microcrystal particle size of 35 nm. Compared with the prior art, the aluminium zinc phosphate product obtained by the method of the invention has better corrosion inhibition performance than traditional zinc phosphate or aluminium phosphate products, and is a antirust material with excellent performance. Additionally, the method has the advantages of no solvent required, mild reaction conditions, easy control, simple process, extensive raw material sources, etc.

The invention relates to a method for preparing a transition metal oxide positive electrode material of lithium. The method is a metal-organic coordination polymer precursor method, and the transition metal oxide of lithium can be prepared by performing thermal treatment and high-temperature calcination to the metal-organic coordination polymer. The transition metal oxide of the lithium prepared by using the method is good in crystal form, has nanoscale, special morphology and specific crystal orientation, and can show excellent electrochemical performance when being used as a positive electrode material of a lithium ion battery. The LiNi0.5Mn1.5O4 synthesized by using a method and having a spinel structure can achieve the specific capacity up to 117mAh/g when being used for discharging at 10 DEG C and 40 DEG C, and the specific capacity can be kept above 81.0% after being cyclized for 500 times. The specific capacity can achieve 105mAh/g after charging and discharging are carried out for 350 times according to 1C rate at 55 DEG C. In addition, the lithium-rich manganese-based positive electrode material 0.3Li2MnO3.0.7LiNi0.5Mn0.5O2 prepared by utilizing the method and having a laminar structure has reversible specific capacity. Two classes of materials are used as the positive electrode materials of the lithium ion battery with high specific energy and high specific power, and the method has wide application prospects.

The invention discloses a molecularly imprinted membrane with a selective-separation chiral drug and a preparation method of the membrane. According to the invention, D-naproxen is taken as template molecules, a PVDF (Polyvinylidene Fluoride) hollow fiber separation membrane is taken as a base material, and the D-naproxen imprinted molecules are packaged in a fenestra grafting gel layer in a surface finish process to prepare the D-naproxen imprinted PVDF hollow fiber membrane. The molecularly imprinted separation membrane prepared by the method has good adsorption and separation functions to naproxen chiral drug molecules, has a desorption rate up to 90%-95.78%, can realize the intelligent regulation and control on combination and release of D-naproxen and solves the problem of uncontrollability on the shape and size of cavities and the affinity of template molecules of the conventional molecularly imprinted membrane. According to the invention, the mature PVDF hollow fiber membrane on the market is taken as a base membrane of the molecularly imprinted membrane, and an N-isopropyl acrylamide monomer (NIPAAm) of the conventional thermo-sensitive hydrogel is taken as a functional monomer; and the preparation method is simple, low in production cost as not needing special equipment, and suitable for industrialized application.

The invention discloses a porous carbon fiber loading transition metal oxide, a biosensor and a preparing method of the porous carbon fiber loading transition metal oxide and belongs to the technicalfield of biosensors. The porous carbon fiber loading the transition metal oxide is prepared in the manner that high-molecular polymers, transition metal salt and a solvent are mixed to obtain a spinning precursor solution, and then carbonization treatment is conducted after electrostatic spinning. The biosensor is prepared in the manner that boric acid base electric conducting polymers are fixed with the porous carbon fiber as the base body. The porous carbon fiber loading the transition metal oxide is provided with a uniform mesoporous structure, holes communicate with one another, subsequenttreatment is not needed, the preparing technology is simple, and repeatability is high. The boric acid base electric conducting polymers are fixedly loaded on the surface of the porous carbon fiber loading the transition metal oxide and can serve as the transmission medium of electric charges, meanwhile, the electric conduction performance and the biological recognition performance of the boric acid base electric conducting polymers can promote the charge transmission capability and the specificity selectivity of an electro-catalysis reaction, and response signals of the electro-catalysis reaction are improved.

The invention provides a method of constructing graphical magnetic micro-nano structures through laser beam direct writing, wherein the method includes the following processes: (1) at least spreading more than one layers of magnetic material particles on a surface of a substrate, and then applying a controllable magnetic field so that the magnetic material particles are arranged orderly according to magnetic lines on the magnetic field on the surface of the substrate; (2) by means of the laser beam entering from one side of the back side of the substrate to scan the substrate, wherein the position irradiated by the laser beam absorbs laser energy so that the position is subjected to rapid temperature increasing, so that the irradiated position on the back side of the substrate is free of being molten or subjected to thin-layer melted while the parts on the magnetic material particles on the front side of the substrate is partially melted, and finally cooling the substrate to achieve welding between the magnetic material particles to the substrate; and (3) repeatedly doing the step (1) and the step (2) to prepare the micro-nano structure being multilayered, being different in size and being order. The method is used for preparing the graphical magnetic micro-nano structure, wherein the size and the shape of the micro-nano structure are controlled, so that super-hydrophobic property, electromagnetic wave absorption and reflection characters of the surface can be adjusted and controlled.

The invention relates to a preparation method of antibacterial structural color fibers based on silk protein. The preparation method comprises the following steps: dispersing colloidal microspheres inwater to prepare colloidal emulsion with mass fraction of 6 to 15 percent, wherein the colloidal microspheres are polystyrene microspheres, polymethylmethacrylate microspheres and titanium dioxide microspheres; dissolving the silk protein, cellulose and rare earth elements in an aqueous solution of alkali, and carrying out electrostatic spinning to obtain silk protein fibers; enabling the silk protein fibers to pass through the colloidal emulsion in a lifting way from bottom to top; drying moisture by airing. The invention also provides an antibacterial structural color fabric based on the silk protein. The antibacterial structural color fabric comprises a base fabric layer and an antibacterial coloring layer, wherein the base fabric layer is formed by weaving warp yarns and weft yarns; all weft yarns are connected between every two adjacent warp yarns in an inclined manner; at least one of each warp yarn and each weft yarn is used as a wrapping yarn; the wrapping yarns are prepared from silks and bast fibers; the bast fibers are core yarns; the silks cover the surfaces of the bast fibers; the antibacterial coloring layer is prepared from the antibacterial structural color fibersbased on the silk protein.