20 results about "Colloidal crystal" patented technology

The present application relates to a controllable preparation method of a colloidal crystal capillary column and its application in biomolecule separation, and specifically comprises the following steps: a plunger and an electroosmotic pump are prepared in situ at one end of a capillary; a buffer solution containing monodisperse colloidal particles is filled in an upper reservoir of an electric field assembly device, and a buffer solution is filled in a lower reservoir; the capillary is filled with the buffer solution, and the end of the capillary containing the electroosmotic pump is inserted into the lower reservoir; the dispersion of the colloidal solution is maintained by applying oscillation to the upper reservoir, an electric field is applied between the two reservoirs to make the colloidal particles move to the electroosmotic pump under the action of an electroosmotic flow, and a three-dimensional colloidal crystal is assembled; and the capillary is supplemented with an ultrasonic force to reduce lattice defects. The present application has the advantages of simple preparation process, controlled directional movement of colloidal particles through an electric field, improved assembly efficiency and quality of the three-dimensional colloidal crystal, and controllable assembly of the colloidal particles under the action of an electric field through regulation and control of the length and surface charge of the electroosmotic pump.

1. The name of the design product: drying box (colloidal particles). 2. The use of the design product: used for constant temperature and humidity drying, promoting the rapid self-assembly of colloidal crystal drying settlement, avoiding dust and other interference. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The present application relates to a kind of detection film and its manufacturing method, chip bonding detection method, detection film is covered on the chip of completion bonding, there are colloidal crystal microspheres in orderly arrangement in detection film, based on the Bragg reflection of colloidal crystal microspheres, according to the light reflected by colloidal crystal microspheres on each chip to determine whether the chip is tilted.

The embodiment of the present application discloses an ultrafiltration membrane and a preparation method and application thereof. The ultrafiltration membrane comprises a porous channel support layer and a functional layer on the outer surface of the porous channel support layer; wherein the porous channel support layer comprises a hot melt type resin and a polytetrafluoroethylene dispersion resin, and the functional layer comprises a hydrophilic colloidal crystal structure formed by arranging hydrophilic colloidal microspheres in an array form on the outer surface of the porous channel support layer. The porous channel support layer and the functional layer in the ultrafiltration membrane of the present application form hierarchical filtration, and the nanoscale gap between adjacent microspheres with the same size in the hydrophilic colloidal crystal structure can realize the rejection of the ultrafiltration level. The hydrophilicity of the hydrophilic colloidal crystal structure can not only improve the anti-pollution property of the ultrafiltration membrane, but also effectively solve the 'Trade-off' effect between the rejection rate and the water flux.

The present invention provides an article with a colloidal crystal structure attached to it, which has a high individual identification function for the colloidal crystal structure and is difficult to see when attached to the article. [Solution] An article 101 with a colloidal crystal structure, comprising an article 110 and a colloidal crystal structure 1 attached to the article 110, wherein the colloidal crystal structure 1 has a particle immobilization layer 20 and a plurality of colloidal particles 30 provided inside the particle immobilization layer 20, and the plurality of colloidal particles 30 are embedded in the particle immobilization layer 20 and arranged apart from each other along a plane direction perpendicular to the thickness direction of the particle immobilization layer 20, forming a plurality of types of two-dimensional crystals, and when viewed from the thickness direction, the directions of the axes of symmetry along the plane directions of the plurality of types of two-dimensional crystals are different from each other, and the colloidal particles 30 are provided on the surface of the article 110.

This invention provides a colloidal crystal structure that offers both high individual identification and decorative functions. [Solution] A colloidal crystal structure 1 comprising a base material 10, a particle fixing layer 20 provided on one main surface side of the base material 10, and a plurality of colloidal particles 30 provided inside the particle fixing layer 20, wherein the plurality of colloidal particles 30 are embedded in the particle fixing layer 20 and are arranged apart from each other along a plane direction perpendicular to the thickness direction of the particle fixing layer 20, forming a plurality of types of two-dimensional crystals, and when viewed from the thickness direction, the directions of the axes of symmetry along the plane direction of the plurality of types of two-dimensional crystals are different from each other, and the average particle size of the plurality of colloidal particles 30 is 1 μm or more.

The application discloses a preparation method of a layered structure silicon oxide film, and belongs to the technical field of deep processing of glass thin film. First, monodisperse polystyrene microsphere emulsion is used as raw material, and 2-5 layers of ordered colloid crystal templates are prepared on a substrate through a doctor blade method. Then, tetraethyl orthosilicate is used as a precursor, hydrolysis and condensation are carried out under catalysis of a specific acid-base sequence, and an SiO2 coating sol is prepared by combining an anionic surfactant as a soft template. Finally, the sol is used as a coating liquid, the above template is used as the substrate, and a film is formed by adopting a spin coating or a pulling method, the template is removed through drying and heat treatment at 400-600 DEG C, and a silicon oxide film with a layered, through and multi-level pore structure is obtained. The method is simple and controllable, the prepared film has the characteristics of low refractive index and high optical transmittance, and has important application prospects in the field of solar photovoltaic cells.

This invention discloses a method for preparing patterned colloidal crystal films with hydrophilic-hydrophobic conversion effects, specifically relating to the field of colloidal crystals. The specific steps are as follows: A colloidal microsphere emulsion of a specific concentration is prepared as a coating solution; a wire rod is used to apply a constant force to the substrate surface to form a film at a uniform speed; after the solvent evaporates, a hydrophilic colloidal crystal film is formed; and then it is placed at a constant temperature for a specific post-treatment time to obtain a hydrophobic colloidal crystal film. This method utilizes the change in the hydrophilic functional groups on the surface of polymer colloidal microspheres under high-temperature conditions to achieve hydrophilic-hydrophobic conversion of the colloidal crystal film at low cost. The hydrophilic-hydrophobic conversion colloidal crystal film prepared by this invention has a simple process and low cost, and can be used in fields such as anti-counterfeiting patterns and sensor devices.

The present application belongs to the field of two-dimensional colloidal glass preparation, and particularly relates to a two-dimensional colloidal glass containing pegs on a substrate and a preparation method thereof. The present application uses a method for preparing a two-dimensional colloidal glass on a substrate containing pegs, which can study the influence of pegs on the structure and dynamics of the two-dimensional colloidal glass, and provide a new idea for people to understand the physical mechanism of glass transition. Meanwhile, the method can also be applied to the preparation of other two-dimensional colloidal systems containing pegs, such as two-dimensional colloidal crystals, to study the influence of pegs on the crystal structure, which is conducive to the preparation of defect-free microstructure materials and has important application value in the fields of sensors, optoelectronic functional materials and the like.

The application belongs to the technical field of environmental protection, and particularly relates to application of a PS@Ag@ZIF-8 composite film in preparation of an optical sensor. The application takes a single-layer colloidal crystal sample as a framework, and prepares PS@Ag@ZIF-8 which is loaded with silver AgNPs on the surface and coated with ultrathin MOFs, and the PS@Ag@ZIF-8 can be used as a high-efficiency optical sensor device. The application increases the refractive index difference of the ordered array, increases the p-v ratio of the film, and improves the color saturation by means of the ingenious design of the AgNPs. The ultrathin two-dimensional structure is combined with the AgNPs, and high-efficiency optical signal conversion and color output are realized for VOCs.

The present application relates to a kind of extracellular vesicle real-time enrichment and detection method;Belong to biological detection technical field;The present application first prepares silica colloidal crystal (SCC) film using vertical evaporation method;Then di-stearoyl phosphatidyl ethanolamine-polyethylene glycol-carboxyl (DSPE) is modified on silica colloidal crystal film, and the affinity characteristics of DSPE and phospholipid bilayer are used to separate and enrich extracellular vesicle in biological liquid;Again, by constructing reflection interference spectrum system, the optical thickness change caused in the process of separating extracellular vesicle is used to carry out real-time detection to extracellular vesicle;The present application can not only quickly and efficiently separate extracellular vesicle in a variety of biological liquids, but also can carry out real-time concentration and membrane protein expression amount analysis to separated extracellular vesicle;The present application provides a kind of fast low-cost integrated multifunctional analysis method for the extracellular vesicle separation of various body fluids.

The invention discloses a manganese-cerium oxide catalyst with a controllable pore structure and a preparation method and application thereof, and belongs to the technical field of catalyst preparation and environmental catalysis, and the preparation method comprises the following steps: 1) preparing a polymethyl methacrylate colloidal crystal template; 2) dissolving a Mn (NO3) 2 aqueous solution, Ce (NO) 3.6 H2O and citric acid in a mixed solution of ethylene glycol and methanol to form a manganese-cerium precursor solution; (3) dipping a polymethyl methacrylate colloidal crystal template into the manganese-cerium precursor solution, and then carrying out suction filtration treatment to obtain a product; and 4) drying the product and roasting at multi-stage temperature to obtain the three-dimensional ordered macroporous manganese-cerium catalyst. The manganese-cerium catalyst with the three-dimensional ordered macroporous structure is prepared by using a colloidal crystal template method, and the catalyst is uniform in pore diameter, ordered in pore channel, high in specific surface area, convenient for mass transfer and active site touch, excellent in toluene catalytic oxidation activity, stability and water resistance, and good in application prospect.

This invention belongs to the technical field of anti-counterfeiting materials and structural color materials, and discloses a physically unclonable structural color anti-counterfeiting label based on discretely distributed micron-sized colloidal crystal fragments and its preparation method. The invention involves placing anti-counterfeiting ink in a mold, which is then cured or dried to obtain the anti-counterfeiting label; the raw material composition of the anti-counterfeiting ink includes micron-sized colloidal crystal fragments and a functional polymer matrix. This invention utilizes the random size, random structure, and random discrete distribution of the structural color colloidal crystal fragments in the polymer matrix to construct a physically unclonable function, achieving not only a vivid visual effect of structural color but also constructing an unreplicable optical anti-counterfeiting feature.

A three-dimensional Bragg grating may include a single colloidal crystal that includes a plurality of repeated layers of material having different refractive indexes. A sample cell for producing a volume Bragg grating may include an internal shape that forms at least one capillary cell having a flat surface and rounded edges. A method of producing a three-dimensional Bragg grating may include: suspending insoluble particles in a host fluid to form a suspension; and exposing the suspension to a sustained microgravity environment.

The invention relates to a method for preparing a colloidal crystal capillary column and application of the colloidal crystal capillary column in peptide fragment and protein separation, and the method specifically comprises the following steps: (1) drawing one end of a capillary into a spray needle, inserting the spray needle into a protective sleeve, and tightly connecting the end, far away from the spray needle, of the capillary with a conical outlet in the lower part of a conical liquid storage tank; (2) fixing the conical liquid storage tank above the centrifugal tube, and placing the capillary tube connected with the conical liquid storage tank in the centrifugal tube; and (3) uniformly dispersing the colloidal particles in the solvent, adding the colloidal dispersion liquid into the conical liquid storage tank, arranging a conical liquid storage tank upper cover at the opening end of the upper part of the conical liquid storage tank, applying centrifugal force to the centrifugal tube, and enabling the colloidal particles to enter the capillary tube from the conical liquid storage tank under the centrifugal action to assemble the three-dimensional colloidal crystal capillary column. The preparation flux of the colloidal crystal capillary column is improved, and the colloidal crystal capillary column has a good application prospect in the aspect of separation and characterization of biomolecules.

The invention relates to a chromium-iridium solid solution oxide electrocatalyst with a three-dimensional ordered macroporous structure as well as preparation and application of the chromium-iridium solid solution oxide electrocatalyst. The preparation method comprises the following steps: (1) preparing a highly-monodispersed polymethyl methacrylate (PMMA) colloidal crystal template by adopting an emulsion polymerization method; (2) introducing a chromium precursor and an iridium precursor into the PMMA suspension, and carrying out mixing and heat treatment to obtain a three-dimensional ordered macroporous skeleton; the three-dimensional ordered macroporous skeleton is composed of highly dispersed nanoscale (1-2nm) chromium-iridium solid solution oxide particles; and (3) the obtained catalyst is subjected to pre-acid leaching treatment, soluble heteroatoms are removed, and the structural stability and the metal leaching resistance are enhanced. The obtained catalyst 3DOM H-Cr0. 75Ir0. 25Ox (3DOM represents a three-dimensional ordered macroporous structure, and H-represents an acid treatment step) shows higher electrocatalytic activity and durability than a traditional iridium-based catalyst under an acidic condition, and the use amount of noble metal is remarkably reduced, so that the cost of a membrane electrode is effectively reduced.

This invention provides a colloidal crystal structure in which diffraction patterns originating from the two-dimensional crystal composed of colloidal particles are easily detected. [Solution] A colloidal crystal structure 1 comprising a base material 10, a particle immobilization layer 20 provided on one main surface side of the base material 10, and a plurality of colloidal particles 30 provided inside the particle immobilization layer 20, wherein the plurality of colloidal particles 30 are embedded in the particle immobilization layer 20 and are arranged apart from each other along a planar direction perpendicular to the thickness direction of the particle immobilization layer 20, forming at least one type of two-dimensional crystal, and the arithmetic mean roughness Ra of the surface of the particle immobilization layer 20 opposite to the base material 10 is 0.5 μm or less.

The application discloses a signal amplification composition for quadruple detection of respiratory pathogens, a detection kit thereof and application, and belongs to the technical field of biology. The signal amplification composition is composed of a fluorescently-labeled AuNS@MoS2-Probe and an amino-modified silica colloidal crystal SiO2 PC-NH2, and realizes double amplification of signals. For low-concentration clinical samples, the application can advance the Ct value, so that samples that need to be rechecked can be directly determined as positive, effectively solves the clinical problem that the signal of a low-concentration sample is weak and is easily submerged by background noise, and reduces the risk of missed detection. The kit is a freeze-dried preparation, has good normal-temperature stability, can simultaneously detect influenza virus A, influenza virus B, a novel coronavirus and mycoplasma pneumoniae, has the advantages of high sensitivity, strong specificity and low missed detection rate, and is suitable for clinical popularization and application.