57 results about "Nanodot" patented technology

The invention relates to a composite nanodot loaded porous carbon nitride photocatalyst as well as a preparation method and application thereof, and the preparation method comprises the following steps: calcining a precursor formed by mixing melamine, cyanuric acid and trithiocyanuric acid to obtain porous carbon nitride, and loading cobalt oxide nanodots and nickel nanodots on the porous carbon nitride in two steps, the composite nanodot loaded porous carbon nitride photocatalyst with excellent visible light catalytic hydrogen production performance is obtained; when the composite nanodot loaded porous carbon nitride photocatalyst obtained by the method is used for photocatalytic hydrogen production, an activity test result shows that the activity of the photocatalyst prepared by the method is improved by 222.5 times compared with that before modification; the preparation method disclosed by the invention has the advantages of high reaction efficiency and good performance of the obtained photocatalyst, and has a wide application prospect.

The invention discloses a preparation method of an environment-friendly degradable single-sided perspective sticker, and belongs to the technical field of modified nano materials. The method comprises the following steps: (1) preparation of a multi-layer composite structure: mixing polylactic acid and poly (butylene succinate), adding nano-montmorillonite and a surface modifier, and carrying out melt blending to form a first-layer melt; stirring poly (butylene adipate-co-terephthalate) and fluorescent carbon nanodots to form a second layer of melt; the first layer, the pressure-sensitive adhesive layer and the second layer are co-extruded and compounded to form a film blank. And (2) construction of the nano-film: biaxially stretching the film blank, imprinting a micropore array, dipping in the silver nanoparticle suspension, and drying to obtain the nano-film. And (3) coating functionalization treatment: immersing into a fluorine-containing nano coating solution, and curing. And (4) post-treatment: carrying out secondary curing. The obtained single-sided perspective sticker is suitable for the fields of buildings, vehicle privacy films and the like, and solves the problems of serious pollution and slow degradation of a traditional sticker.

The invention provides a preparation method of a plate-shaped glassy carbon electrode, which comprises the following steps: curing a resin raw material into a plate-shaped resin block, carbonizing in an inert atmosphere, and respectively introducing a nitrogen source and a boron source for doping operation to obtain a co-doped plate-shaped resin block precursor; placing the co-doped plate-shaped resin block between two porous graphite plates, and carrying out high-temperature treatment to obtain a glassy carbon matrix; and immersing the glassy carbon substrate into the adhesion layer solution to form an adhesion layer, transferring the adhesion layer into a deposition solution which comprises a bismuth-containing solution and a gold-containing solution, forming bismuth-gold nano-dots on the adhesion layer, and washing and drying the bismuth-gold nano-dots to obtain the plate-shaped glassy carbon electrode. Through directional arrangement of crystal orientations, the tantalum carbide coating achieves higher electrical conductivity and thermal conductivity. And the sensitivity and the service life of the plate-shaped glassy carbon electrode are obviously improved and prolonged.

The invention provides a bright-field microscopic imaging quality detection system, which belongs to the field of imaging quality detection and comprises an imaging optical module, a bright-field illumination optical module, a carrier and an image quality detection nano-point mechanism. The imaging optical module is arranged above the carrying table, and the imaging optical module collects an image of the image quality detection nano-point mechanism on the carrying table to realize image quality detection; the image quality detection nanodot mechanism comprises a nanostructure scatterer and a substrate. According to the invention, by designing the illumination pupil and the nanodot mechanism, a P polarized light Brewster angle illumination mode is realized, the adverse effect of the secondary reflected light of the substrate on the signal-to-noise ratio of the image is filtered out, the serious influence of the reflected light of the substrate on the signal-to-noise ratio of the image in the point spread function measurement based on nanostructure imaging is reduced, and the measurement accuracy is improved. And the signal-to-noise ratio of online image quality detection is improved. The system can be popularized and applied in the fields requiring on-line image quality detection, such as microscopic imaging, nanoscale semiconductor quantity detection, overlay quantity detection and the like.

The invention relates to a controllable electrochemical etching strategy based on solubility product difference, in particular to a preparation method of a barium sulfate modified NiCo-LDH aqueous alkaline zinc battery positive electrode material, which comprises the following steps: firstly, dissolving 1, 4-phthalic acid and sodium hydroxide in a molar ratio of 1: 2 in water to obtain a solution A; dissolving barium nitrate pentahydrate, cobalt nitrate hexahydrate, nickel nitrate hexahydrate and ammonium fluoride in water according to a molar ratio of (0-1.5): 1: 4: 10 to obtain a solution B; the preparation method comprises the following steps: fully mixing the solutions, transferring the mixed solution into an autoclave containing foamed nickel (NF), and carrying out solvothermal reaction to obtain a tri-metal Co / Ni / Ba-MOF precursor (CNBx-BDC); cNBx-BDC is used as a working electrode, a platinum wire is used as a counter electrode, Hg / HgO is used as a reference electrode, 5-6M potassium hydroxide and 0.05-0.06 M sodium sulfate are used as electrolyte, a three-electrode system and a cyclic voltammetry method are adopted, electrochemical etching is carried out at the scanning rate of 20-30mV s <-1 > under the voltage range of 0-0.5 V, and the barium sulfate nanodot functionalized Co / Ni / Ba-LDH electrode (BS (at) CN-LDH) is obtained after six times of circulation. The unique porous structure can provide more electrochemical active sites and enhance electrolyte infiltration capacity, and the constructed heterostructure forms a strong built-in electric field, accelerates charge transfer, reduces ion diffusion energy barriers and improves energy utilization efficiency.

This invention discloses a silicon-carbon composite anode material, its preparation method, and a lithium battery prepared using ALD and CVD technologies. The method includes: growing a first metal oxide on the surface of a carbon substrate using ALD atomic layer deposition; reducing the first metal oxide on the surface of the carbon substrate to metal-containing nanodots in a reaction chamber; heating the carbon substrate with the nanodots in a reactor and injecting a gas mixture containing silane and an inert gas; growing silicon nanowires on the nanodots using a silane CVD pyrolysis process; heating the carbon substrate with the grown silicon nanowires in a reactor and injecting hydrocarbon gas; and coating the surface of the silicon nanowires with a carbon layer using a CVD pyrolysis process to obtain the silicon-carbon composite anode material. This method effectively prevents the volume expansion of silicon nanowires during charge and discharge, improving the cycle performance of the silicon-carbon composite anode material.

The application belongs to the field of electrode materials, and particularly relates to a raw-state ultra-thin carbon-coated metal sulfide nanodot material, which comprises metal sulfide nanodots and a nanoscale-thickness carbon layer uniformly coated on the surface of the metal sulfide nanodots. The application also provides a preparation method and application of the material. Different from conventional metal sulfide@carbon materials, the nanomaterial disclosed by the application is formed synchronously with metal sulfide and carbon materials, and the metal sulfide particles are smaller (nanodots), and the surface is uniformly coated with ultra-thin carbon material reaching atomic level nanoscale. Research finds that the material has better stability and better electrochemical performance in alkali metal secondary batteries.

The application relates to a silicon-carbon negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: obtaining soft carbon microspheres by using a first carbon source for thermal polymerization; performing spray coating of the soft carbon microspheres, a second carbon source, graphite carbon nanodots and an activating agent, cooling and solidifying, first heating and activating, then neutralizing with an acid and washing to obtain a porous carbon sphere precursor; under an inert atmosphere, feeding a silicon source into the porous carbon sphere precursor and performing second heating, so that the silicon source is cracked and elemental silicon is deposited and adsorbed inside the porous carbon sphere to obtain a porous silicon-carbon sphere; heating and warming the porous silicon-carbon sphere and feeding an organic gas to form a carbon layer on the surface of the porous silicon-carbon sphere, and finally obtaining the silicon-carbon negative electrode material. The obtained silicon-carbon negative electrode material can avoid separation of the porous carbon sphere and the homogeneous porous carbon layer after external force roller pressing, can prevent particle breakage, can improve the structural strength of the silicon-carbon negative electrode material, and can further improve the capacity of a battery system and the cycle life.

The invention discloses a surface nano oxide dispersion strengthening method for high-strength and high-toughness aluminum alloy powder and a powder material thereof, and relates to the technical field of powder metallurgy materials. Aluminum-zinc-magnesium-copper-zirconium pre-alloyed atomized powder is used as a matrix, and is dispersed by virtue of polyvinylpyrrolidone and anhydrous alcohol; the preparation method comprises the following steps: sequentially introducing magnesium aluminate spinel nanoparticles, optional magnesium oxide nanoparticles and passivated magnesium nanoparticles for dry coating, embedding a nano dot matrix into a surface layer through ceramic ball micro shot blasting, removing organic matters in a vacuum subsection manner, thermally activating at 405-435 DEG C, cooling, and adding zinc micro powder for low-energy coating. The method is suitable for canning degassing, hot isostatic pressing and hot extrusion workpieces. And large-scale production can be realized. The oxide in the obtained powder is converted into intragranular non-communicated dispersion particles from a prior powder boundary communicated interlayer, the boundary connectivity is reduced, the densification combination is improved, the fracture toughness, impact and high-cycle fatigue are remarkably improved, meanwhile, the powder fluidity is kept, and the consistency is improved.

The invention provides a listeria monocytogenes detection kit based on iron-tannic acid network coating aggregation-induced emission nanodots and a detection method. The listeria monocytogenes detection kit comprises Cas12a protein, crRNA, a single-stranded nucleic acid fluorescent probe, an iron-tannic acid network coating aggregation-induced emission nanodot dispersion liquid, a Lamp element, a buffer solution and enzyme-free water. According to the present invention, the iron-tannic acid network coating aggregation-induced emission nano-dot is adopted as the light-emitting material, Cy5-ssDNA is adopted as the fluorescent probe, and the specific gene segment Listeria of Listeria monocytogenes is adopted as the target sequence to construct the two-color ratio fluorescent biosensor, and the two-color ratio fluorescent biosensor can be used for detection of Listeria monocytogenes in food, the method has the advantages of simplicity, no dependence on large instruments, low cost, short detection period, low background, high sensitivity, strong specificity, high efficiency, reliability and the like.

The application provides a carbon nanodot-based temperature sensor and a preparation method thereof. The carbon nanodot-based temperature sensor comprises, from bottom to top, a substrate layer, an interdigital electrode layer and a sensing layer. The sensing layer comprises hydrophilic carbon nanodot particles and an ionic salt. The sensing layer is formed by drop coating of a mixed aqueous solution of the hydrophilic carbon nanodot particles and the ionic salt. The preparation method is simple and easy to implement, and has low cost. The prepared temperature sensor has high sensitivity, high precision and high stability. The sensitivity of the temperature sensor reaches 345951.8%℃ ‑1 .

This invention discloses a composite material of carbon-supported silicon nanodots derived from a hierarchical porous metal-organic framework (MOF), relating to the field of lithium-ion battery anode materials. The invention includes preparing a hierarchical porous MOF precursor with both micropores and mesopores; converting the precursor into a hierarchical porous carbon framework through controlled heat treatment; confining the growth of silicon nanodots within the mesopores of the carbon framework via vapor deposition; and removing residual metals by acid washing to obtain a purified target composite material. By using a MOF with a hierarchical porous structure as a precursor and combining it with vapor deposition technology, this invention enables the in-situ construction of uniformly dispersed silicon nanodots within the mesopores of the derived carbon framework, while simultaneously maintaining an efficient ion transport network using a microporous system.

[Problem] To provide a method for producing a multilayer object using an inkjet process, in which intra-dot nanopatterns that are expressed in nanodots can be stably adjusted into desired shapes in accordance with the application. [Solution] The method for producing a multilayer object at least includes: a printing step in which nanofluid droplets are ejected by an inkjet process onto a substrate on which a coating film may have been formed; and a drying step in which the ejected nanofluid droplets are dried to form a plurality of nanodots. The nanofluid droplets each comprise a dispersion medium and nanoparticles dispersed therein. In the printing step and the drying step, intra-dot nanopatterns expressed in the plurality of nanodots are adjusted by adjusting the Marangoni number Ma, the ratio kev of contact angle relaxation time to evaporation time, and the Péclet number Pe.

The invention relates to the technical field of high polymer materials, and discloses a super junction MOSFET device structure and a manufacturing method thereof, and the method comprises the steps: forming a catalyst nano dot matrix on a semiconductor substrate; and then, in a single and continuous epitaxial growth process, N-type pulses and P-type pulses are alternately executed at high frequency, so that catalyst-guided growth of the N-type semiconductor columns and selective epitaxial filling growth of the P-type semiconductor columns are realized, and a self-aligned super junction structure is formed. According to the method, an in-situ real-time optical monitoring system is utilized, and according to different thicknesses of an epitaxial layer in the initial growth stage, the middle growth stage and the final growth stage, the duration time of pulses is adjusted in a self-adaptive mode, and surface topology is compensated. The prepared super junction structure is an integral single crystal structure without a physical interface, so that an atomic-scale steep doped junction is realized, the process is simplified, interface defects are eliminated, and charge balance can be accurately controlled, thereby obtaining a device with low leakage current, high breakdown voltage uniformity and high surface flatness.

An electrocatalyst comprising bismuth nanodot-doped zinc materials is used for electrochemical reduction of carbon dioxide to formate. The electrocatalyst consists of bismuth nanodots dispersed on a zeolitic imidazolate framework-8 wherein the bismuth-zinc material is in the form of particles with a longest dimension of 200 to 1000 nm. The bismuth-zinc material is utilized in H cell, flow cell, and MEA cell applications for carbon dioxide reduction.

The present invention discloses a method for detecting thiourea using carbon nanodots and gold nanoparticles as fluorescent probes, which belongs to the field of analytical detection. The technical solution of the present invention is: fluorescent carbon nanodots are mixed with gold nanoparticles in advance, and the fluorescence of the carbon nanodots will be quenched based on the fluorescence resonance energy transfer effect; then, if thiourea is present in the sample to be tested mixed with the probe, the thiourea will trigger the aggregation of gold nanoparticles through coordination and decombinate the carbon nanodots from the gold nanoparticles, and finally restore the quenched fluorescence of the carbon nanodots. Under the optimized detection conditions, the relative fluorescence intensity of the carbon nanodot-gold nanoparticle probe shows a good linear relationship with the thiourea concentration in the range of 0.05-1μM, and the detection limit (S / N=3) is 0.0362μM. The detection method established by the present invention is not only convenient, but also has excellent selectivity and sensitivity, and can be effectively applied to the detection of thiourea in tap water, lake water and fruit and vegetable juice.

The invention discloses an orange fluorescent silicon nanodot, a preparation method thereof and an application of the orange fluorescent silicon nanodot in mitochondrial imaging in living cells, the method comprises the following steps: S1, dissolving tetramethyl rhodamine methyl ester in ultrapure water, then adding N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, uniformly stirring, and carrying out hydrothermal reaction on the obtained mixture; and S2, cooling after the reaction is finished, purifying the product by using a chromatographic column, eluting by using an eluent, collecting the eluent, and drying to obtain the orange fluorescent silicon nanodot. The silicon nanodot provided by the invention has the advantages of good light stability, high quantum yield and the like, and can be successfully applied to positioning imaging of mitochondria in living cells; compared with common blue-green fluorescence, orange fluorescence has better tissue penetrating ability and background interference resistance; the O-SiNDs prepared by the invention also has the property similar to that of lipophilic cations, and can realize high-specificity targeted marking on mitochondria of living cells.

The invention provides an image quality detection nano-dot mechanism for bright field microscopic imaging, and belongs to the field of imaging image quality detection.The image quality detection nano-dot mechanism comprises a nano-structure scatterer and a substrate, high-reflectivity coating films are arranged on the upper surface and the lower surface of the substrate, an imaging area without the high-reflectivity coating film is arranged in the middle of the upper surface of the substrate, and the high-reflectivity coating films are arranged in the imaging area. And the nano-structure scatterer is arranged in the imaging area. According to the application, the substrate with the imaging area is arranged in the area of the image quality detection nano-dot mechanism, so that the image quality detection nano-dot mechanism meets a strong scattering effect and a high bright field image signal-to-noise ratio under the working wavelength of the bright field microscopic imaging system, and is convenient to popularize and apply in the field of online image quality detection of the bright field microscopic imaging system.

The application provides a single-chain super-small fluorescent polymer nanodot modified Bacillus subtilis derived nanometer calcium carbonate composite material (SC-PNPs@CaCO3) as a high-sensitivity fluorescent sensing platform for choline acetyltransferase (ChAT) activity detection. The composite material is synthesized through biological mineralization of Bacillus subtilis, the free radical polymerization method is used to prepare the SC-PNPs with positive charges on the surface, and a stable fluorescent sensing system is constructed through self-assembly. Coenzyme A (CoA) is generated in the ChAT catalytic reaction, which can significantly quench the fluorescent signal of the material, realize high-sensitivity detection of the ChAT activity change, and the detection limit reaches 0.00074 mU / mL. The fluorescent sensing platform can realize real-time monitoring of the ChAT activity change, and reveal the regulation effect of the cholinergic signal pathway in the repair process in a skin repair model. The application provides an innovative technical means for choline acetyltransferase activity analysis, and provides a new research direction for exploring the function of the cholinergic system in skin repair and other physiological and pathological processes.

The application discloses a preparation method of an environment-friendly degradable single-side perspective sticker and belongs to the technical field of modified nanometer materials. The method comprises the following steps: (1) preparation of a multilayer composite structure: mixing polylactic acid and polybutylene succinate, adding nano-montmorillonite and a surface modifier to melt blend to form a first layer melt; stirring polybutylene adipate terephthalate and fluorescent carbon nanodots to form a second layer melt; and forming a film blank by co-extruding the first layer, a pressure-sensitive adhesive layer and the second layer; (2) construction of a nanometer film: biaxially stretching the film blank, pressing a micropore array, immersing in a silver nanoparticle suspension and drying to obtain a nanometer film; (3) functionalization treatment of a coating layer: immersing in a fluorine-containing nanometer coating solution and solidifying; and (4) post-treatment: secondary solidification. The obtained single-side perspective sticker is suitable for fields such as building and vehicle privacy films, and solves the problems of large pollution and slow degradation of traditional stickers.

The invention belongs to the technical field of battery materials, and discloses a composite silicon-based negative electrode material, a preparation method thereof and a battery, the composite silicon-based negative electrode material comprises nanometer silicon and a carbon net, the nanometer silicon is distributed on the carbon net, and the nanometer silicon and the carbon net are tightly combined; the carbon net is doped with a nitrogen element, and the surface of the carbon net is loaded with nano-copper. The carbon material is doped into the silicon-based negative electrode material, the copper nanodots in the carbon material can promote electron conduction, and the nitrogen-doped carbon net has higher stability and can provide better frame support for the copper nanodots and nano silicon, so that the structural stability and conductivity of the silicon-based negative electrode material are improved, and the volume change of the silicon-based negative electrode material is relieved. Besides, the nitrogen-doped carbon net loaded with the copper nanodots provides a stable composite layer for the nano silicon material, so that the volume expansion of the silicon negative electrode can be effectively inhibited, and the structural stability of the silicon negative electrode is improved.

The invention provides a light source transition area gradient light-emitting display screen based on a photonic crystal, which relates to the technical field of display screens and comprises a photonic crystal substrate, a light source module, a driving module, a feedback module and a data processing control end, the photonic crystal substrate is a silicon-based and polymer-based two-dimensional photonic crystal and is installed on a core optical layer of the display screen, non-uniform periodic gradient structures are periodically distributed on the surface of the photonic crystal substrate, the periodic change range is 50-200 nanometers, and a point defect microcavity array, a chiral structure, a sub-wavelength columnar metasurface array and a waveguide bending structure are embedded in the substrate. Aiming at the defects in the aspect of light field regulation and control in the prior art, smooth gradual change of a light field at a sub-wavelength level is realized through the non-uniform periodic gradient structure (the period is 50-200 nanometers) of the photonic crystal substrate, the point defect microcavity array and the waveguide bending structure; the problem of abrupt change of light intensity caused by traditional pixel-level brightness adjustment is solved.

The invention provides preparation of an ultra-small nano probe with efficient biomarker performance and super-resolution imaging application of the ultra-small nano probe. The nanodot is of a core-shell structure, and the core-shell structure comprises a fluorescent core, a fluorescent layer and a fluorescent layer, wherein the fluorescent core is composed of a single-chain semiconductor polymer; the shell layer is composed of an amphiphilic compound, a hydrophobic part of the amphiphilic compound is combined with the semiconductor polymer, a hydrophilic group is located on the surface of the shell layer to serve as an active group, the average particle size of the nanodot is smaller than 5 nm, and the nanodot is of a glassy structure. The nanodot can realize high-density specific marking of various subcellular organelles and nano-scale biological fluorescence imaging.

The invention discloses a metal nanodot in-situ deposition method based on an STM-MBE vacuum interconnection system and a semiconductor device. The STM-MBE vacuum interconnection system comprises an STM observation chamber, a vacuum sample transfer chamber and an MBE growth chamber which are sequentially butted and isolated; the in-situ deposition method comprises the following steps: introducing a metal source into an MBE growth chamber so as to deposit a wrapping layer on the surface of an STM needle tip in the MBE growth chamber; the substrate in the MBE growth chamber and the STM needle point deposited with the wrapping layer are conveyed to an STM observation chamber through a vacuum sample conveying chamber; and a voltage pulse module in the STM observation cavity is used for generating a pulse signal, so that the wrapping layer on the surface of the STM needle tip is converted into a molten state and deposited on the substrate in a nanodot form, and the metal nanodot is obtained. According to the in-situ deposition method, controllable nanoscale deposition of the metal source can be achieved, and the electrical / quantum performance of the metal source is fully guaranteed.

The invention relates to the technical field of composite materials, in particular to a CdS-NiCo-LDH composite material and a preparation method and application thereof. According to the preparation method disclosed by the invention, NiCo-LDH is firstly obtained through hydrothermal reaction, and then CdS nanodots are introduced into NiCo-LDH interlayers through electrochemical reaction and in-situ vulcanization, so that the interlayer spacing is increased, and OH <-> transportation is facilitated; due to the construction of the CdS nanodots, the conductivity of the CdS nanodots is improved, electron migration of the CdS nanodots is facilitated, and electrochemical reaction active sites are increased. Meanwhile, the in-situ synthesis method not only avoids the adverse effect of secondary growth, but also reduces the volume expansion of NiCo-LDH in the oxidation-reduction reaction process.

The application discloses a kind of ZnIn2S4 / amorphous MoO 3‑x Preparation and application of nanodot Z system photocatalyst, it relates to the field of photocatalysis.It is simple to operate, environment-friendly, and the prepared ZnIn2S4 / amorphous MoO 3‑x Nanodot catalyst has excellent hydrogen production performance and stability.First, amorphous MoO 3‑x Nanodot is synthesized by ultrasonic chemical method, then MoO 3‑x Nanodot is loaded on ZIS by one-pot hydrothermal method, and ZM catalyst is obtained.First, a certain amount of ZM catalyst is weighed and placed in a quartz photo-reactor, then triethanolamine aqueous solution without dissolved oxygen is added, argon is introduced to exhaust air, and the reactor is sealed.The reactor is placed in a magnetic stirrer and the temperature of the reactor is maintained by a constant-temperature tank.The application improves the electron-hole separation efficiency of the composite catalyst, reduces the recombination efficiency, and expands the light absorption range.

This invention relates to the field of environmental pollutant detection, specifically to the application of organosilicon nanodots and their hydrogel sensors in the detection of tetrabromobisphenol A (TBA) concentration. The method includes: uniformly mixing an organosilicon nanodot stock solution with a sample to be tested, allowing it to stand in the dark to obtain a test solution; acquiring the sample fluorescence intensity value of the test solution at a specific wavelength, and the control fluorescence intensity value of a blank control solution without the test sample; calculating the quenching efficiency based on the sample fluorescence intensity value and the control fluorescence intensity value; and calculating the TBA concentration of the sample to be tested based on the quenching efficiency and a standard working curve; wherein the standard working curve is obtained by fitting the concentration of a TBA standard solution and its corresponding quenching efficiency. This invention aims to provide a simple, efficient, environmentally friendly, highly sensitive, and highly selective method for detecting TBA concentration.

The application relates to the technical field of composite materials, in particular to a CdS-NiCo-LDH composite material and a preparation method and application thereof. In the application, NiCo-LDH is obtained through a hydrothermal reaction, then CdS nanodots are introduced into the interlayer of the NiCo-LDH through an electrochemical reaction and in-situ sulfuration, so that the interlayer spacing is increased, the transportation of OH- is facilitated, the conductivity of the CdS nanodots is improved, the electron migration is facilitated, and the electrochemical reaction active sites are increased. Meanwhile, the in-situ synthesis method not only avoids the adverse influence of secondary growth, but also reduces the volume expansion of the NiCo-LDH in the redox reaction process.

The present application relates to the field of high-temperature-resistant film, co-doped nanocrystals and surface matrix material, and particularly relates to a polyimide matrix co-doped nanocrystal film and a preparation method thereof. A co-doped nanocrystal precursor modified reverse-phase fine emulsion is prepared first, and then a dispersion containing the co-doped nanocrystal precursor and polyamic acid is prepared; then, the dispersion containing the co-doped nanocrystal precursor and polyamic acid is spin-coated on a clean quartz glass sheet, and is placed in a replaceable air oven for drying to obtain a polymer matrix co-doped film; finally, after sintering and cooling, a polyimide matrix co-doped film is obtained. The thickness of the polyimide matrix co-doped film can be controlled within 80-500 nanometers, and the base film is flat; the co-doped nanocrystals are uniformly distributed in the form of nanodots on the matrix film; the film can be used at high temperature, the base film does not deform, and the co-doped nanodots have good adhesion.

The application discloses a growth method of a strain cooperative regulation Ge / GaInAs epitaxial structure, and the epitaxial structure comprises, from bottom to top, a GaInP nucleation layer, a GaInAs matching buffer layer, a bottom tunnel junction n-GaAs / p-AlGaAs, an AlGaInAs lattice buffer layer, a self-assembled Ga nanodot array, a target GaInAs matching buffer layer, a target GaInAs layer, an AlInP window layer and a GaInAs cap layer on a germanium substrate. 0.1 As matching buffer layer, bottom tunnel junction n-GaAs / p-AlGaAs, Al k Ga 1‑x In x As lattice buffer layer, self-assembled Ga nanodot array, Al k Ga 1‑y In y As target matching buffer layer, Ga 1‑y In y As target layer, Al 1‑z In z P window layer and Ga 1‑y In y As cap layer. The application combines defect engineering of self-assembled nanodots and atom-level smooth growth of migration enhanced epitaxy, reconstructs an epitaxial starting interface on a nanometer scale, forms a triple system of a nucleation layer, a lattice buffer layer and a nanodot array, and realizes three-dimensional and multi-scale inhibition of dislocations and point defects.