59 results about "Colloidal crystal" patented technology

The invention discloses a carbon nanotube quasi-catalyst as well as preparation and application thereof, and relates to the technical field of synthesis of carbon nanotube catalysts. A metal catalyst precursor salt, an oxide carrier precursor salt and a complexing agent are mixed to prepare a precursor solution, the colloidal crystal microsphere template is soaked in the precursor solution, and the quasi-catalyst can be obtained after suction filtration, drying and low-temperature heat treatment. When the quasi-catalyst is used for preparing the carbon nano tube, dangerous reducing gas such as hydrogen is not needed, and the carbon nano tube powder which is small and uniform in diameter, excellent in conductivity and easy to disperse can be efficiently prepared on a large scale under the conditions of low carrier gas flow rate and low reaction temperature. The quasi-catalyst and the preparation technology thereof have remarkable technical advantages and cost benefits, and have wide application prospects.

The invention discloses a SiOxCy-coated integrated carbonaceous honeycomb framework material as well as preparation and application thereof, and belongs to the field of electrochemical energy storage and functional nano composite materials. The material is prepared by adopting a co-sacrifice template low-temperature pyrolysis strategy, and is realized through the steps of metal salt-colloidal crystal microsphere template precursor preparation, precursor compression molding, double-temperature-zone one-step roasting and the like. The preparation process is simple, the macrostructure is regular and controllable, and the chemical composition is adjustable; the graphene carbonaceous matrix is in three-dimensional interconnection with the SiOxCy nanoparticles, and the carbon nanotubes grow in situ. When used as a lithium ion battery negative electrode material, the material does not need traditional conductive agents, binding agents and current collectors, shows high reversible capacity and excellent cycling stability, and is suitable for the fields of electric automobiles, energy storage power stations, household energy storage, standby power supplies and the like.

The invention discloses a carbon nanofiber and carbonaceous honeycomb framework composite conductive agent material and a preparation method thereof, and belongs to the field of carbon materials. The method comprises the following steps: blending ferric nitrate and nickel nitrate with citric acid according to a molar ratio of 3: 1 to prepare an impregnation precursor solution; dipping an organic colloidal crystal template and drying to obtain a catalyst precursor; in a double-temperature-zone tubular furnace, a carbon source and a catalyst precursor are synchronously heated in a specific atmosphere, and the composite material with a fishbone-shaped structure is obtained through one-step roasting. The material is a composite system of carbon nanofibers and a carbonaceous honeycomb structure, the electronic conductivity reaches 40-140 S / cm, the structure and thermal stability are good, and the rate capability and cycle life of an electrochemical energy storage system such as a lithium ion battery can be remarkably improved and prolonged as a conductive agent. The method is simple in process and mild in condition, and has a good application prospect.

The invention relates to the technical field of optical thin film materials, and discloses a preparation method and application of a liquid colloidal crystal thin film material. The preparation method of the liquid colloidal crystal film material comprises the following steps: preparing a monodispersed colloidal particle solution; a dual-channel or multi-channel flow control structure is adopted, so that the chaos effect of fluid is optimized, and uniform distribution of nano-particles on a liquid-solid interface is promoted; by accurately controlling the flow speed, the pressure gradient and the flow channel structure, particle aggregation or disordered accumulation is avoided; injecting a colloidal particle solution; after the film is formed, the film structure is ensured to be stable through curing treatment, and the colloidal crystal film with stable optical characteristics is obtained. Through fusion of fluid mechanics, colloidal chemistry and interface engineering technologies and combination of a micro-fluidic technology and a colloidal crystal thin film technology, the technical bottlenecks of a traditional optical thin film material in structural precision, environmental stability and large-scale production are overcome, and a solution is provided for high-safety photoelectric encryption, anti-counterfeiting and flexible optoelectronic devices.

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.

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 discloses a melanin-containing multi-layer structural color hydrogel microneedle patch and a preparation method and application thereof.The preparation method comprises the steps that a colloidal particle solution is injected into a microneedle mold, and a colloidal crystal microneedle template is obtained through a deposition method; preparing a hydrogel pre-polymerization solution from melanin and a high-molecular organic matter pre-polymerization solution, injecting the hydrogel pre-polymerization solution into a microneedle mold containing a colloidal crystal microneedle template, and curing the hydrogel pre-polymerization solution to obtain a colloidal crystal hydrogel mixed microneedle patch; after the colloidal crystal microneedle template is removed, the inverse opal structure hydrogel scaffold containing melanin is obtained; preparing a pre-gel solution of a drug-added temperature-sensitive polymer material, pouring the pre-gel solution into holes of the prepared inverse opal structure hydrogel stent, and cooling and curing to form a shell layer, thereby obtaining the hydrogel stent. The hydrogel microneedle patch provided by the invention contains an inverse opal structure bracket with photo-thermal conversion capacity and inherent immunoregulation performance and a temperature-sensitive gel outer layer loaded with drug components, and integrates multiple functions of photo-thermal response, drug release, immunoregulation, sensing and the like.

The present invention discloses a Mg / Ba dual-doped catalyst for the catalytic combustion of methane, its preparation method, and application. The catalyst uses La2Ce2O7 as a carrier and Mg and Ba oxides as active components. The carrier and active components are combined using a hydrothermal method, and the catalyst is then uniformly loaded using a colloidal crystal template method. This pyrochlore-type compound (A2B2O7) has high thermal stability, meeting the requirements of a methane oxidative coupling (OCM) catalyst. The catalyst is highly selective, exhibits high catalytic activity in the OCM reaction at low temperatures (<650°C), exhibits high methane removal rates, and produces high yields of C2 products (C2H4 and C2H6), promising broad market applications.

The invention belongs to the technical field of functional polymer materials, and discloses a colloidal crystal coating with structural color and a preparation method and application thereof, the preparation method comprises the following steps: 1) mixing water, acrylic acid, an initiator, styrene and a first cross-linking agent, and polymerizing to obtain a colloidal particle emulsion; 2) continuously adding an initiator, butyl acrylate, methyl methacrylate, acrylic acid and a second cross-linking agent into the colloid particle emulsion, and then carrying out secondary polymerization to obtain a core-shell colloid particle emulsion; 3) concentrating the core-shell colloid particle emulsion, and adding carbon black to obtain an electrophoretic deposition solution; and (4) platinum serves as a cathode, metal with the electrode potential lower than that of platinum serves as an anode, electrophoretic deposition is conducted, and the colloidal crystal coating with the structural color is generated on the surface of the anode. The electrophoretic deposition liquid composed of the core-shell colloidal particle emulsion and the carbon black is used, the colloidal crystal coating with the structural color is deposited on the metal surface through electrophoretic deposition, and the preparation process is simple, controllable and environmentally friendly.

The present invention belongs to the field of micro-nano optical materials technology, specifically relating to a hexagonal, non-close-packed gold nanoparticle array based on a microscopically complex surface and a method for preparing the same. The preparation method is primarily based on a colloidal crystal template calcination method and comprises: filling the microscopically complex surface with UV-curable adhesive and curing it; assembling a monolayer of polystyrene microspheres using a gas-liquid interface self-assembly method and transferring them to a target surface; and sputtering a monolayer of elemental gold and calcining it to produce a hexagonal, non-close-packed gold nanoparticle array with a well-symmetric microscopically complex surface. The non-close-packed gold nanoparticle array prepared by the present invention not only exhibits good periodicity and substrate conformability, but also has an additional step compared to the traditional colloidal crystal template calcination method, resulting in simpler operation.

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 invention belongs to the technical field of catalysts. The invention provides a catalyst for preparing cyclopentanone through cyclopentanol dehydrogenation and a preparation method thereof.The preparation method comprises the steps that S1, 120-126 g of potassium pyrophosphate, 10-13 g of stannous chloride, 8-10 g of copper sulfate and 2-3 g of carbon nano tube powder are added into 1 L of deionized water, the pH value is adjusted to 7-8, and an electroplating solution is obtained; s2, assembling a PS colloidal crystal template on the pretreated copper sheet to obtain a copper sheet with the PS colloidal crystal template; s3, taking a copper sheet with the PS colloidal crystal template as a cathode and a titanium mesh as an anode, performing electro-deposition in the electroplating solution, roasting at 500-550 DEG C for 3-4 hours, stripping and grinding to obtain a Sn-Cu-CNT composite material; s4, etching the Sn-Cu-CNT composite material with 10vol% acetic acid for 30-35 minutes in an ice bath at 0-5 DEG C to obtain an etched material, putting the etched material into an ammonia water-EDTA (Ethylene Diamine Tetraacetic Acid) mixed solution with the pH (Potential of Hydrogen) of 9.5, and oscillating for 10 minutes at 60 DEG C to obtain a carrier; and S5, impregnating the carrier with a nickel nitrate solution, drying, and roasting to obtain the catalyst. The method can effectively improve the conversion rate of cyclopentanol and the selectivity of cyclopentanone.

Technologies for harmonic acoustic manipulation of colloidal particles include a system having a piezoelectric substrate coupled to one or more segmented acoustic transducers and a fluid positioned above the substrate. The segmented transducers have multiple segments, each with a resonant frequency equal to a harmonic frequency. The system further includes a controller that generates a harmonic signal including multiple harmonic components and applies the signal to the segmented acoustic transducers to generate an acoustic potential field in the fluid and manipulate the colloidal particles. The system may translate or rotate the particles, and may form the particles into a colloidal crystal monolayer. The system may selectively pair or otherwise group and separate individual particles. The system may pair and separate multiple groups of particles. The system may measure adhesion between particles. The system may pattern particles over a surface. The colloidal particles may be cells.

To provide a colloidal crystal film that satisfies a specific condition and that is extremely characteristic and excellent in design properties compared with a conventional colloidal crystal film.SOLUTION: A laminate has a base material and a colloidal crystal layer. When λ[10] is the maximum wavelength derived from Bragg reflection in a reflection spectrum in which an incident angle and a reflection angle relative to the colloidal crystal layer are both set to 10°, and λ[70] is the maximum wavelength derived from Bragg reflection in a reflection spectrum in which the incident angle and the reflection angle are both set to 70°, λ[10] and λ[70] indicate a predetermined relationship.SELECTED DRAWING: Figure 2

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 invention belongs to the technical field of nano structure preparation, and discloses a regular-shape nano round hole array structure and a preparation method thereof. According to the preparation method, large-area, uniformly and densely arranged nanoscale polystyrene microspheres are prepared on a target substrate by using an LB membrane method, and a high-quality two-dimensional colloidal crystal is formed; the morphology and size of the microspheres are controlled by using an inductively coupled plasma etching technology; depositing a target material on the surfaces of the obtained microspheres and the substrate by using a vacuum evaporation coating technology with good deposition directivity; and finally, stripping the polystyrene nanometer microspheres to prepare the nanometer circular hole array. According to the technical scheme disclosed by the invention, the nano round hole array structure with a regular shape can be prepared in a large area at low cost, and the method has relatively high universality; the prepared nano round hole array structure has the characteristics of regular shape, high consistency, uniform arrangement, controllable size and the like.

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.

The invention provides a preparation method of a high-performance SERS (Surface Enhanced Raman Scattering) substrate based on colloidal crystal template etching and application of the high-performance SERS substrate in detection of benzylpenicillin potassium in medical wastewater. The specific preparation process comprises the following steps: S1, obtaining large-area polystyrene colloid nanospheres which are uniformly, tightly and hexagonally arranged on the water surface by using an inclined plate-assisted gas-liquid interface self-assembly method, and transferring a crystal mask plate to the surface of a clean silicon substrate at a constant speed by using a Czochralski method; s2, putting the silicon wafer integrated with the large-area nanospheres into reactive ion etching (Oxford 100), uniformly etching the nanospheres by adopting oxygen plasma, shortening the distance between the nanospheres, and enhancing local electromagnetic coupling; s3, silver of 60 nm is deposited on the surfaces of the nanospheres in a thermal evaporation mode, and due to the electromagnetic resonance effect of the metal nanoparticles, Raman signals can be further enhanced. And S4, putting the structured SERS substrate and the untreated substrate into a penicillin potassium solution with the concentration of 0.1 mol / L, soaking for 20 minutes, naturally airing, and measuring a Raman signal by using a micro Raman spectrometer.

The present invention addresses the problem of providing a two-dimensional colloidal crystal structure having few defects in the crystal structure. A titanium dioxide-containing layer (2) is formed on a substrate (1), and a two-dimensional colloidal crystal layer (4) is further formed on the titanium dioxide-containing layer (2). This structure is manufactured by: 1) a substrate preparation step (S1) in which a metal oxide layer (2) is formed on the surface of a substrate (1); 2) as a colloidal crystal dispersion preparation step (S2), preparing a dispersion (6) having a charged three-dimensional colloidal crystal (5) having a surface charge opposite to the surface charge of the metal oxide layer (2); and 3) as a two-dimensional colloidal crystal formation step (S3), a dispersion liquid (6) of the charged three-dimensional colloidal crystal (5) is brought into contact with the metal oxide layer (2).

The invention discloses an epoxidation catalyst as well as a preparation method and application thereof. The preparation method of the epoxidation catalyst comprises the following steps: preparing hollow silicon dioxide microspheres by using a template method, mixing and dispersing the hollow silicon dioxide microspheres and polystyrene microspheres, vertically immersing a quartz glass sheet into a solution, and standing to obtain a colloidal crystal film. And drying and roasting the film to obtain the three-dimensional ordered silicon dioxide template with vacancies. And immersing the template into the prepared silicon dioxide sol, standing and drying. And immersing, standing and drying. And then carrying out vapor deposition to load a titanium source, roasting, washing with water, and carrying out ammonium fluoride pretreatment to obtain the epoxidation catalyst. The catalyst has the characteristics of high activity and high selectivity especially for epoxidation of macromolecular olefin.

The application belongs to the technical field of adsorbing material preparation, and particularly relates to a one-step preparation method of hierarchical ordered porous ZrO2 adsorbing material with controllable morphology; the application can prepare two kinds of PS microsphere original emulsion with uniform particle size in the particle grading of micron to nanometer, and directly self-assembles into a binary PS colloidal crystal template with controllable morphology without subsequent treatment; in the process, the particle size of the two kinds of PS microspheres is controlled by controlling the adding amount, dropping speed, adding time and reaction time of KPS; the proportion of the two kinds of PS microspheres with different particle sizes is controlled by adjusting the mass ratio of the secondly added styrene monomer and the PS microspheres in the original emulsion; the ZrO2 precursor is mixed with the binary PS colloidal crystal, impregnated, suction filtered and calcined to obtain the hierarchical ordered porous ZrO2 adsorbing material with controllable morphology in the matching of micron to nanometer different pore diameters; the material can realize more accurate filtration of pollutants such as suspended particles with different sizes in water, and has a longer service life and more stable filtration performance.

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.

This invention discloses a highly saturated structural color photonic crystal microsphere, its preparation method, and its applications, belonging to the field of crystal materials technology. This invention employs a two-step method to prepare a water-in-oil-in-water (W / O / W) multiple emulsion. Through thermal curing of the oil phase, the liquid colloidal crystal is coated to form photonic crystal-cured microspheres, which can be directly applied as photonic crystal pigments without further assembly. The microspheres prepared by this method retain the highly saturated structural color of the photonic crystal and exhibit a certain angle dependence. The preparation process is simple, the microsphere size is adjustable, and the cost is low. This invention can synthesize structural color microspheres of various colors by synthesizing P(St / MAA) nanospheres of different particle sizes, broadening the application of structural colors in cosmetics, coatings, and other fields, achieving vibrant colors, environmental friendliness, and colorfastness.

The invention discloses a high-sensitivity controllable mechanical discoloration colloidal crystal hydrogel material and a preparation method thereof, and particularly relates to the field of colloidal crystal materials, the high-sensitivity controllable mechanical discoloration colloidal crystal hydrogel material comprises an elastic hydrogel base layer and a layer number controllable colloidal crystal film; the hydrogel base layer has stretchable and compressible properties, and the colloidal crystal film is formed by periodically arranging monodisperse colloidal particles and can generate Bragg diffraction with electromagnetic waves so as to generate structural colors. When the hydrogel base layer is subjected to stretching or compression stimulation, the volume of the hydrogel base layer is deformed, so that the distance between the colloidal crystals is changed, a reflection peak is displaced, and high-sensitivity detection of strain is realized. The prepared mechanical color-changing sensor has the characteristics of high sensitivity and high stability, and can be used in the fields of strain sensors, health monitoring, anti-counterfeiting materials and the like.

The application discloses a photonic crystal-plasmonic superlattice composite superstructure and a preparation method and application thereof, and belongs to the technical field of nanomaterials, and the method comprises the following steps: (1) self-assembling monodisperse silica nanogel particles in a medium to form a liquid colloidal crystal, coating the liquid colloidal crystal on a substrate surface, and evaporating a solvent to form a three-dimensional array of silica photonic crystals; (2) sequentially modifying gold nanoparticles by using mercapto polystyrene and 1,8-octanedithiol, and then making the gold nanoparticles form a film at a liquid interface to obtain a gold nanometer superlattice ordered two-dimensional monolayer film; and (3) transferring the gold nanometer superlattice ordered two-dimensional monolayer film to the three-dimensional array of silica photonic crystals to prepare the photonic crystal-plasmonic superlattice composite superstructure. When the photonic crystal-plasmonic superlattice composite superstructure is used as a SERS substrate, the photonic crystal light bandgap characteristics and the plasmonic localized plasmonic near-field coupling characteristics can be fully utilized, the interaction between light and matter can be synergistically enhanced, and the Raman enhancement effect can be improved.

The invention provides an operation method of lactagogue visual detection based on a mammary gland organ-like chip, relates to the technical field of biomedical detection, and has the technical key points that the invention provides inverse opal structure microspheres for lactagogue visual detection based on the mammary gland organ-like chip and a preparation method of the inverse opal structure microspheres. According to the method, a micro-fluidic device is used for obtaining monodisperse colloidal crystal microspheres, the inverse opal structure hydrogel microspheres are obtained through a method for copying pores of the silicon dioxide colloidal crystal microspheres, the process is simple, the cost is low, and control is easy; the inverse opal structure microspheres prepared by the method provide structural color, so that protein molecules in milk can be efficiently adsorbed, and the adsorption process can be monitored in real time. The lactagogue effects of different lactagogue medicines and whether breast milk can meet the nutritional requirements of infants can be evaluated by detecting the protein content of milk, personalized nutritional support can be provided for premature infants, and the growth and neurodevelopment of the premature infants can be improved.