658 results about "Nanocrystal" patented technology

The invention provides a cerium oxide photo-thermal synergistic catalytic material loaded with a metal promoter as well as a preparation method and application of the cerium oxide photo-thermal synergistic catalytic material. The cerium oxide photo-thermal synergistic catalytic material loaded with the metal promoter comprises a cerium oxide nanocrystal and the metal promoter loaded on the surface of the cerium oxide nanocrystal, the exposed crystal face of the cerium oxide nanocrystal comprises a {111} crystal face, and the area of the {111} crystal face accounts for more than 50% of the total area of the outer surface of the crystal face; the mass fraction of the metal cocatalyst is 0.1-2wt% of the mass of the cerium oxide. The catalytic material provided by the invention takes cerium oxide with a {111} crystal face as an exposed special crystal face as a carrier, photons can be captured and charges can be separated more efficiently, and phonons further promote deep trap state charge release. Meanwhile, the metal additive is added and cooperates with cerium oxide with exposed special crystal faces for catalysis, so that the catalytic effect is remarkably improved, and efficient catalytic combustion of methane is achieved under the mild condition.

The invention discloses a corrosion-resistant protective sleeve for an aluminum alloy cable and a preparation method of the corrosion-resistant protective sleeve, and belongs to the field of cable protective sleeves. The corrosion-resistant protective sleeve for the aluminum alloy cable is prepared from the following raw materials in parts by mass: 40 to 50 parts of ethylene propylene diene monomer, 15 to 25 parts of fluorinated silicone rubber, 5 to 10 parts of modified thiolated ethylene-vinyl alcohol copolymer, 8 to 15 parts of metal fluoride nanocrystal, 4 to 8 parts of vulcanizing agent, 3 to 8 parts of plasticizer and 3 to 5 parts of flame retardant. The two rubber matrixes are compounded to form a physical barrier layer to prevent corrosion media and water molecules from permeating, material pores can be filled with the metal fluoride nanocrystals, diffusion channels of the corrosion media are reduced, and hydrophobicity and corrosion resistance are improved through cooperation of the metal fluoride nanocrystals and the fluorinated silicone rubber. The modified thiolated ethylene-vinyl alcohol copolymer can improve the compatibility between rubber matrixes and form coordination with metal ions of the metal fluoride nanocrystals, so that the diffusion path of a corrosive medium is prolonged, and the corrosion of the corrosive medium is synergistically blocked.

The invention discloses a preparation method of a high-strength, high-hardness and ablation-resistant CuWTaTeAl gradient nano composite material. The method comprises the following steps: 1, mechanically mixing Cu80Al20 spherical coated powder, Cu90W10 spherical coated powder, WTe2 alloy powder, Ta powder and Cu powder, and then carrying out ball milling and mixing; 2, performing SPS (spark plasma sintering); thirdly, after soaking treatment, multi-pass hot rolling deformation is carried out, and then quenching treatment is carried out; and 4, annealing heat treatment. The binary spherical coating powder, the alloy powder and the elementary substance powder are subjected to ball milling and mixing to achieve uniform distribution of all elements, high-melting-point W and Ta are added to improve the ablation-resistant temperature of the composite material, large-scale copper dendrite powder is added to form gradient distribution nanocrystals, the proportion of all the elements is controlled, the lattice distortion degree is increased, and the ablation-resistant temperature of the composite material is improved. The high-strength, high-hardness and ablation-resistant CuWTaTeAl gradient nano composite material is suitable for the fields of contacts, switches, electrical connectors, resistance welding electrodes and the like.

The invention provides a coil module and electronic equipment. Relates to the technical field of circuit boards. A high-speed signal line and a wireless charging coil are integrated in the same coil module. The coil module can comprise a substrate and a metal layer formed on one side of the substrate, the metal layer comprises a thick metal area, a thin metal area and a transition area located in a junction area of the thick metal area and the thin metal area, a wireless charging coil is arranged in the thick metal area, and a high-speed signal line is arranged in the thin metal area. The first nanocrystal and the second nanocrystal are oppositely arranged on the two sides of the substrate, at least part of the periphery of the wireless charging coil is covered with the first nanocrystal, the first nanocrystal extends to the position above the transition area, and at least part of the wireless charging coil is covered with the second nanocrystal. The integration level can be improved, space resources are saved, and the high-speed signal line and the wireless charging coil are pulled away through the transition area without affecting the signal quality of the high-speed signal line and the wireless charging coil.

The invention relates to a UCNPs probe-based in-situ dynamic monitoring molecular interaction method, which comprises: S1, providing a UCNPs probe, the core layer of the UCNPs probe being a rare earth up-conversion nanocrystal, the shell layer of the UCNPs probe being an anti-quenching inert material, and the anti-quenching inert material coating the surface of the rare earth up-conversion nanocrystal; the surface of the anti-quenching inert material is modified with ligand molecules, and the ligand molecules are used for being specifically combined with target molecules in a to-be-detected sample; s2, mixing or contacting the UCNPs probe with a to-be-detected sample containing target molecules to construct a to-be-analyzed molecular interaction system; s3, irradiating the molecular interaction system by adopting near-infrared pulse laser, and collecting the change of the fluorescence lifetime tau of the UCNPs along with the time t and the change of the fluorescence intensity I along with the time t in real time to obtain a tau-t curve and an I-t curve; and S4, according to the tau-t curve and the I-t curve, realizing in-situ dynamic monitoring on the molecular interaction state. According to the method, a molecular binding / dissociation event is directly converted into a quantifiable and anti-interference optical signal, and the technical defect that in-situ dynamic monitoring of molecular interaction cannot be achieved in a traditional technology is overcome.

The invention discloses a solid waste-based low-carbon gel material and a preparation method thereof. The material comprises the following components in percentage by mass: 40%-60% of high-activity slag, 20%-35% of tower bottom ash subjected to stage treatment, 3%-8% of a pH sensitive composite exciting agent, 0.5%-2% of nano C-S-H seed crystal, 0.1%-1% of modified cellulose nanocrystals and 15%-25% of water, and the water-solid ratio is controlled to be 0.15-0.28. The preparation method comprises the steps of tower bottom ash grading pretreatment, nano C-S-H seed crystal preparation and dispersion, pH sensitive composite exciting agent preparation, mixing and slurry preparation. Sulfate release is optimized through staged treatment, alkalinity is dynamically regulated and controlled through a pH sensitive exciting agent, ordered hydration and a multi-stage pore structure are induced through nano C-S-H seed crystals and modified cellulose nanocrystals, and the compressive strength, the impermeability and the low expansion rate are remarkably improved. Industrial solid waste is effectively utilized, energy consumption and carbon emission are reduced, the problems of non-uniform hydration and expansion cracking are solved, and the method is suitable for the fields of green buildings and resource recycling.

The invention discloses a forming method of a flash memory unit. The forming method comprises the following steps: providing a semiconductor substrate; forming a tunneling oxide layer on the semiconductor substrate; forming nanocrystalline silicon particles on the tunneling oxide layer; forming an isolation insulating layer on the tunneling oxide layer and the nanocrystalline silicon particles; and forming a control grid on the isolation insulating layer, wherein the step of forming the nanocrystalline silicon particles on the tunneling oxide layer comprises: forming an amorphous silicon layer on the tunneling oxide layer; and performing repeated seed crystal particle forming processes on the amorphous silicon layer, wherein surface annealing treatment is performed between two adjacent seed crystal particle forming processes, and an annealing process is performed after the last seed crystal particle forming process. The flash memory unit can be used for storing a large quantity of electrons, and has high performance.

A razor blade is proposed. The razor blade may include a blade substrate having a blade edge formed therein, and a coating layer formed on the blade substrate. The coating layer may contain a matrix-forming atom, a first atom, and a second atom. The coating layer may contain a first coating region and a second coating region located at different depths in the thickness direction. The second coating region may have a larger number of nanocrystal regions than the first coating region.

The invention provides an inorganic fiber prepared from industrial solid waste and a preparation method thereof, and belongs to the technical field of inorganic fiber preparation. According to the rare earth doped low-temperature co-melt, a silicon-oxygen network is destroyed and stabilized, the viscosity of solid waste melt is reduced, phase splitting is inhibited, and a uniform melt environment is created; the viscosity of the carbon-coated composite nanoparticles is reduced through in-situ carbon thermal reduction reaction in a synergistic manner, and meanwhile, a reactant gas is utilized to clarify a melt, so that internal defects are removed; the apatite surface modified core-shell nanocrystal is used as a microstructure construction core, a fine and uniform microcrystalline phase is formed in the fiber through induction, and a high-strength basis of the material is constructed; homogenization of the low-temperature co-melt is the premise of subsequent uniform dispersion of additives, core-shell nanocrystals construct a high-strength microcrystalline matrix, carbon-coated particle cores are positioned at a phase interface, the fibers are endowed with high toughness through a physical mechanism, and comprehensive mechanical properties are improved through cooperation of the core-shell nanocrystals, the carbon-coated particle cores and the core-shell nanocrystals.

The invention provides a nanocrystalline composite oral ulcer film agent as well as a preparation method and application thereof. The nanocrystalline composite oral ulcer film agent comprises a waterproof backing layer and a drug-loading adhesion layer coated on the waterproof backing layer, the drug-loaded adhesion layer comprises a macromolecular hydrogen bond compound formed by a weakly acidic polymer and a nonionic proton receptor polymer, and a nanocrystalline drug. Compared with the prior art, the preparation method has the advantages that the polyacrylic acid polymer and the nonionic cellulose polymer interact to form IPC serving as an adhesion layer film-forming material, the nanocrystals are loaded into the adhesion layer film-forming material, the waterproof backing layer is coated with the adhesion layer film-forming material, and the oral ulcer film agent is prepared after drying and cutting. The obtained film agent has good comfort and adhesive power, shows good drug stability and permeation promotion performance, can be used as a carrier of an oral administration route, prolongs the drug action time and improves the curative effect. The preparation method of the film agent is simple and easy for industrial mass production.

The invention provides a magnetic resin composition, a magnetic film and application thereof. The magnetic resin composition comprises (A) a magnetic filler, (B) epoxy resin, (C) a curing agent and (D) a flexibilizer, the magnetic filler (A) comprises carbonyl iron powder (A1), FeSiCr alloy (A2) and iron-based nanocrystals (A3); based on the total mass of the magnetic resin composition as 100%, the content of the (A) magnetic filler is 85% or more; based on 100% of the total mass of the magnetic filler (A), the content of the carbonyl iron powder (A1) is 55%-65%, the content of the FeSiCr alloy (A2) is 15%-25%, and the content of the iron-based nanocrystalline (A3) is 15%-25%. According to the magnetic resin composition and the preparation method thereof, specific types of magnetic fillers are introduced and compounded according to a specific content, so that the magnetic resin composition has relatively high magnetic conductivity and relatively low magnetic loss after being cured, and meanwhile, the binding force with a copper layer is relatively high.

The invention relates to the technical field of radiation refrigeration films, and discloses a porous polyvinylidene fluoride based composite radiation refrigeration film and a preparation method thereof. The method comprises the following steps: firstly, carrying out melt blending on PVDF, NaCl and ZnO nanoparticles and forming a film, then dissolving out NaCl through water washing, and constructing a continuous three-dimensional porous structure in a PVDF matrix; and immersing the obtained porous PVDF / ZnO membrane material into a methanol aqueous solution containing 2-methylimidazole, so that ZnO is subjected to a coordination reaction at the pore wall and is converted into the ZIF-8 nanocrystal in situ. In the thin film prepared by the steps, the micron-sized salt-induced pore structure, the nano-sized ZIF-8 particles and the interface of the ZIF-8 particles jointly form a multi-stage scattering network, so that the scattering ability of the thin film in the solar spectrum range of 0.25-2.5 microns can be remarkably enhanced, the high infrared emission performance of the PVDF matrix in an atmospheric window of 8-13 microns is maintained, and the thin film has high solar reflectivity and high infrared emissivity, and can be used for preparing the solar film. An excellent radiation refrigeration effect can be achieved, and the heat-dissipating material is suitable for being applied to building outer surfaces, equipment heat dissipation, individual heat management and the like.

The invention is applicable to the technical field of photoelectricity, and provides a single-matrix white-light rare earth lead-free perovskite nanocrystal, a preparation method and application, and the single-matrix white-light rare earth lead-free perovskite nanocrystal is Eu < 3 + > ion doped Cs3TbCl6 nanocrystal. The rare earth ion Eu < 3 + > is doped into the Cs3TbCl6 nanocrystal, full-spectrum white light emission of blue light (matrix self-limiting state exciton emission), green light (Tb < 3 + > ion emission) and red light (Eu < 3 + > ion emission) is obtained, excellent thermal stability and environmental stability are achieved, and the nanocrystal material also shows excitation light dependent color adjustable emission (blue light, green light, red light and white light) and has good application prospects. The nanocrystal prepared based on a solution method can be applied to large-area flexible photoelectric devices; the fluorescent conversion layer can be used as a fluorescent conversion layer of a white light emitting diode with a high color rendering index, and can also be applied to anti-counterfeiting and information encryption.

The invention relates to a quercetin nanocrystal and a preparation method and application of a quercetin nanocrystal preparation, and the preparation method of the quercetin nanocrystal comprises the following steps: step 1, mixing a quercetin absolute ethyl alcohol solution and a geniposide aqueous solution, and centrifuging to obtain a precipitate; and 2, washing the precipitate with distilled water, discarding the supernatant, adding the precipitate into water, dispersing to obtain a quercetin-geniposide suspension, and freeze-drying to obtain the quercetin nanocrystal. The geniposide is used as a carrier to prepare the quercetin nanocrystal, the geniposide is used for regulating and controlling the morphology and size of the quercetin nanocrystal to enable the quercetin nanocrystal to play a synergistic effect, and the effect of the quercetin on treating ulcerative colitis is greatly improved.

An optical lens assembly includes at least one optical lens element and at least one optical element. At least one surface of the at least one optical lens element or the at least one optical element includes a low reflection layer, and the low reflection layer includes a rough layer, a nanocrystalline particle and a hydrophobic layer. The nanocrystalline particle is disposed between the rough layer and the hydrophobic layer, and the hydrophobic layer is farther away from the surface of the at least one optical lens element or the at least one optical element than the nanocrystalline particle. A material of the nanocrystalline particle at least includes SiO2.

The application provides a method for regulating halogen perovskite microstructure at a frozen temperature by using a laser and an electric field, and relates to a device, which is a customized TEM in-situ sample rod equipped with a laser optical fiber and a liquid nitrogen Dewar bottle, and a Nd:YAG pulse laser system with a wavelength of 532 nm, adjustable pulse frequency and a pulse duration of 7 ns coupled into a transmission electron microscope through the optical fiber; first, at a frozen temperature, perovskite nanocrystals are etched by controlling the energy, frequency and action time of the pulse laser, then at the frozen temperature, the small crystal nucleus rotation of the perovskite nanocrystals is controlled by using a low-energy pulse laser and applying an electric field, and the perovskite nanocrystals are recrystallized along specific crystal faces, so that perovskite nanocrystals with specific exposed surfaces, reduced microstructure defects and increased radiation resistance are obtained, and the method has great value for large-scale industrial production.

An example thin-film transistor includes a silicon-based substrate and a source and drain at the silicon-based substrate. The source and drain are spaced apart by a gap. The thin-film transistor further includes a nucleation layer in contact with at least the silicon-based substrate within the gap, and a body of channel material in contact with the nucleation layer. The channel material is nanocrystalline tin oxide (SnO2). The nucleation layer includes a nucleation element that may reduce thermally induced stress between the silicon-based substrate and the body of channel material. The nucleation element may also promote a preferred crystal orientation for the channel material.

The invention provides a surface-modified perovskite nanocrystal and a preparation method and application thereof, and the surface-modified perovskite nanocrystal comprises: a perovskite nanocrystal having a chemical composition of ABX3; wherein A is selected from at least one of Cs < + >, CH3NH3 < + > and HC (NH2) 2 < + >; b is selected from at least one of Pb < 2 + >, Sn < 2 + >, Ge < 2 + > and Mn < 2 + >; x is selected from halogen anions; the surface of the perovskite nanocrystal is coated with an organic ligand layer; the organic ligand comprises a halogenated organic ligand. In the surface modified perovskite nanocrystal, the surface of the perovskite nanocrystal is coated with the organic ligand layer, so that surface defects can be effectively passivated at the same time, and the surface integrity and the crystallization quality of the nanocrystal are remarkably improved. And due to the surface consistency, the defect state density is reduced, and the exciton and phonon coupling coefficient is reduced, so that a non-radiative composite channel is remarkably inhibited, and the optical performance of the perovskite nanocrystal is remarkably improved.

The invention relates to a perovskite quantum dot capable of improving luminous intensity through light driving and a preparation method thereof, the perovskite quantum dot comprises a micro / mesoporous template and perovskite nanocrystals located in pore channels of the micro / mesoporous template, and tungstate ions are loaded in the pore channels of the micro / mesoporous template; under the irradiation of blue light, B-site metal cations in the perovskite nanocrystals react with tungstate ions to form a BWO4 passivation layer. According to the invention, the formation of the BWO4 passivation layer in the micro / mesoporous template is driven by blue light illumination, and the surface defects of the perovskite quantum dots are passivated, so that the luminous efficiency of the perovskite quantum dots is further improved.

The application discloses a method for preparing noble metal nanocrystals by a low-VOC polyol method, and belongs to the technical field of nanometer catalyst preparation. The method uses high-boiling polyol with a normal pressure boiling point not lower than 200 DEG C as a solvent and a reducing agent, adjusts the pH value of reaction slurry to 9-13 in a composite additive system containing a surface protecting agent and a pH regulator, and then carries out a reduction reaction at 160-200 DEG C through ultrasonic dispersion and programmed temperature rising to prepare supported noble metal nanocrystals. The application solves the VOC emission problem of the traditional method from the source by using high-boiling polyol. Meanwhile, the accurate control of nanocrystal size is realized through the synergistic effect of pH regulation and programmed temperature rising. The prepared catalyst has the advantages of uniform particle size, high dispersity and excellent catalytic performance. The method is stable in process, low in cost, green and environment-friendly, and suitable for large-scale production.

The invention discloses a curcumin nanocrystal preparation as well as a preparation method and application thereof. The invention relates to a curcumin nanocrystal composition which is prepared by drying and curing a curcumin nanocrystal suspension to a blank pellet core, the curcumin nanocrystal suspension contains 20-35% of curcumin nanocrystals, 1-10% of a three-dimensional protective agent and 1-10% of a charge protective agent, and the average particle size of the curcumin nanocrystals is 200-320 nm. The curcumin nanocrystal composition prepared by the invention can effectively prevent and treat heat stroke and complications thereof, remarkably improve heat tolerance, prolong survival time, reduce the level of inflammatory factors in blood, protect intestinal epithelial cells and intestinal barrier functions, reduce damage caused by heat stroke, prevent and treat body and organ damage caused by heat stroke, and improve the curative effect of the curcumin nanocrystal composition. The preparation has the advantages of being high in drug loading capacity, good in stability, high in bioavailability, safe, effective, convenient to carry and the like.

Low-cost and earth abundant, Ni1-xMox alloy nanocrystals, with sizes ranging from 18-43 nm and varying Mo composition (0.0-11.4%), were produced by a colloidal chemistry method for alkaline HER reactions. For a water splitting current density of −10 mA / cm2, these alloys demonstrate over-potentials of −62 to −177 mV, which are comparable to commercial Pt-based electrocatalysts (−68 to −129 mV). The cubic Ni0.934Mo0.066 alloy nanocrystals exhibit the highest activity as alkaline HER electrocatalysts, outperforming commercial Pt / C (20 wt %) catalyst.

The invention belongs to the technical field of oral medicine preparations, and particularly relates to a microcrystal suspension multi-ball soft capsule and a preparation method and application thereof.The microcrystal suspension multi-ball soft capsule is of a three-level structure formed by a shell, temperature-sensitive hydrogel and medicine-carrying microcrystal balls, and the medicine-carrying microcrystal balls are in a three-level structure under the spatial constraint effect of the temperature-sensitive hydrogel. The medicine-carrying microcrystalline balls are prevented from settling or freely moving; after the medicine is orally taken and enters a body, the shell is rapidly disintegrated, the temperature-sensitive hydrogel is slowly corroded, the medicine-carrying microcrystalline balls are released accordingly, and it is ensured that the medicine nanocrystals are stably dissolved out. Besides, in the preparation process, only conventional equipment, such as a high-pressure homogenizer and a soft capsule pressing machine, is needed, and a special nano synthesis or crosslinking process is not needed; the preparation process is easy to control and meets the large-scale production requirement.

This invention belongs to the field of biosensing and detection technology, specifically disclosing a Tau protein electrochemiluminescent aptamer sensor, its preparation method, and its application. The sensor uses a CsPbBr₃@PVP / Au composite material as the electrochemiluminescent substrate. A Tau protein-specific aptamer is immobilized on the substrate surface via Au-S bonds, and non-specific adsorption sites are blocked with 6-mercapto-1-hexanol. The CsPbBr₃@PVP / Au composite material is prepared by encapsulating CsPbBr₃ with PVP and then combining it with Au NPs. This invention utilizes the coordination passivation effect of PVP and CsPbBr₃ to significantly improve the aqueous stability and electrochemiluminescence efficiency of perovskite nanocrystals. Combined with the anchoring effect of AuNPs and the specific recognition effect of aptamers, it achieves ultrasensitive detection of Tau protein with a detection limit as low as 0.80 fg / mL. Furthermore, it exhibits excellent selectivity, stability, and detection accuracy in complex biological samples such as cerebrospinal fluid, providing a novel and efficient detection platform for the early diagnosis of Alzheimer's disease and showing promising clinical application prospects.

The invention belongs to the technical field of functional material preparation and environmental catalysis, and particularly relates to a SrTiO3 synthesis and La doping process based on a step-by-step Joule heat method and application of a prepared La-SrTiO3 photocatalyst in organic pollutant degradation. The step-by-step Joule heat preparation process is innovatively developed and comprises the steps that firstly, rapid crystallization of STO is achieved through Joule heat; nanocrystals with uniform particle sizes are obtained; 2, atomic-scale doping of the La element is completed with the help of Joule heat, and an ideal defect structure is constructed; a tubular furnace is not needed in the whole process, the synthesis and doping period is shortened to the second level, and a brand new solution is provided for efficient preparation of the high-performance STO photocatalytic material.

This invention discloses a method for precipitation separation and ceramic solidification of divalent strontium and tetravalent uranium in radioactive waste liquid, relating to the field of radioactive waste liquid treatment and disposal. U in high-level radioactive waste liquid is in the form of hexavalent uranyl (UO2). 2+ U exists in the form of hydrogenation catalytic reduction, and the present invention uses hydrogenation catalytic reduction to prepare U. 4+ Sr 2+ and U 4+ ionic radius and Ln 3+ Due to the significant differences, CePO4·0.667H2O cerium phosphate, which has a stronger nuclide-containing capacity, was selected as the co-precipitation enrichment agent for Sr. 2+ and U 4+ Separation precipitant. Inexpensive raw materials such as UO2(NO3)2·6H2O, Sr(C2H3O2)2, NH4H2PO4, and Ce(NO3)3·6H2O are selected. By controlling the Sr... 2+ :U 4+ Ion ratio, reaction time, temperature, pH, and preparation of well-developed Sr crystals 2+ / U 4+ The precipitate of cerium phosphate solid solution with high solid content is avoided by using spark plasma solid-state sintering technology to prevent grain agglomeration and adhesion during high-temperature dehydration and crystal transformation of cerium phosphate. Furthermore, pressure sintering can promote further growth of nanocrystals and promote U... 4+ and Sr 2+ Homogenization within the monazite ceramic solidified body enables a one-step preparation of monazite ceramic solidified body from a lanthanite solid solution.

This invention belongs to the field of polymer materials, specifically relating to a low-heat-shrinkage polymeric film for laser drilling and its preparation method. The film comprises modified polyphenylene ether resin, vinyl-containing benzoxazine resin, a specific cationic initiator, a toughening agent, and inorganic modified fillers: gadolinium lanthanum zirconate core-shell nanocrystals and lithium aluminum borosilicate nanowires. The preparation method includes: first, surface-treating the two inorganic fillers with a silane coupling agent and then dispersing them in a solvent to obtain a slurry; then, mixing this slurry with the modified polyphenylene ether resin, vinyl-containing benzoxazine resin, cationic initiator, and toughening agent to form a homogeneous adhesive; finally, coating the adhesive onto a carrier film and drying and curing it at three temperature stages from low to high to obtain the finished film. The film prepared by this method exhibits extremely low heat shrinkage during laser drilling, effectively controlling resin protrusion or indentation defects on the hole wall, and significantly improving the quality and reliability of micropore processing.

The present application relates to the technical field of medical apparatus, particularly relates to wearable and vibration control nail base nanocrystal microneedle transdermal drug delivery device, including shell, both sides of the shell are provided with a group of positioning notches respectively, a group of positioning notches are provided with a threaded hole respectively, the inside four corners of the shell are provided with a group of support seats respectively, still include controller assembly, nanocrystal microneedle assembly, vibration assembly, power supply assembly and fixed ring assembly, the controller assembly is detachably installed in the shell, the shell is provided with vibration assembly and battery assembly respectively, the bottom end of the shell is detachably provided with nanocrystal microneedle assembly, the both ends of the fixed ring assembly are detachably connected with a group of positioning notches respectively, the nanocrystal microneedle assembly is used for lightly pricking nail base epidermis and nail plate edge to form microchannel, the power supply assembly provides power for vibration assembly and controller assembly;It makes drug directly contact focus.

The invention discloses an electromagnetic shielding material as well as a preparation method and application thereof. The electromagnetic shielding material comprises a transparent conductive ITO (Indium Tin Oxide) film substrate; the periodic nanocrystalline pixel arrays are respectively positioned on the upper surface and the lower surface of the ITO film substrate; the periodic nanocrystalline pixel array is formed by arranging a plurality of nanocrystalline units according to a specific pattern, the patterns of the nanocrystalline units on the upper surface and the lower surface are complementary and are shaped like a Chinese character'tian 'or' 8 ', cells occupied by nanocrystalline on the upper surface are smaller than cells occupied by nanocrystalline on the lower surface, such as combinations of a cross shape / an open square ring, an H shape / a 2 shape and the like, and therefore the periodic nanocrystalline pixel array is formed. According to the present invention, with the cooperation of the global conductivity of the ITO substrate and the local electromagnetic attenuation characteristic of the nanocrystalline pixel, the electromagnetic shielding efficiency is more than or equal to 40 dB (0.01 MHz-10 GHz) and the global light transmittance is more than or equal to 60%, such that the material is suitable for the electronic device display window requiring high light transmittance and strong electromagnetic shielding, and the problems that the traditional metal shielding material is opaque, and the shielding efficiency of the conductive polymer is insufficient are solved.

A multispectral luminosity three-dimensional imaging system based on a nanocrystalline color conversion light source comprises a nanocrystalline light source module, an illumination control module, an image acquisition module and a three-dimensional reconstruction calculation module. The nanocrystalline light source module realizes multi-band accurate illumination; the illumination control module realizes independent lighting of a light source channel by channel based on a shift register and a single chip microcomputer, and outputs a synchronous trigger signal to a camera, so that each image corresponds to the unique light source direction; the image acquisition module acquires a multi-wavelength and multi-direction reflection image sequence, and uses a mask to limit an effective area; and the three-dimensional reconstruction calculation module estimates the light source direction, performs photometric stereo solution on each spectral channel, reconstructs a complete three-dimensional surface topography through cross-channel normal fusion and Poisson depth recovery, and generates a multispectral albedo graph and a pseudo-color normal graph. According to the invention, the stability and precision of normal estimation and depth recovery under a complex material surface are improved, and miniaturized, high-fidelity and multiband photometric three-dimensional imaging is realized.