44results about How to "Precise size control" patented technology

This invention discloses a cultivation experimental device for studying plant ectomycorrhizal fungal interactions. It includes a base with a petri dish on it. A protective shell is installed around the petri dish on the top of the base. A circular plate is rotatably mounted inside the protective shell. Both the circular plate and the top surface of the protective shell have two symmetrical arc-shaped ventilation openings. An adjustment component connects the circular plate and the protective shell, including a splined sleeve rotatably connected to the top of the protective shell. This invention provides a cultivation experimental device for studying plant ectomycorrhizal fungal interactions that offers high adjustment precision, effortless operation, and stability. The precise design of the ventilation opening adjustment component allows for accurate control of the opening size, meeting the oxygen requirements of different fungal species and plants. Furthermore, the threaded connection of the protective shell enhances the stability and practicality of the device, providing strong support for scientific research.

This utility model discloses an integrated chamfering and edge grinding machine, relating to the field of machining technology. It includes a conveyor frame, an edge grinding frame, a clamping assembly, a lifting mechanism, and an edge grinding assembly. In use, the conveyor motor, chamfering drive motor, clamping motor, lifting mechanism, and edge grinding motor are activated separately via a controller. First, the output shaft of the clamping motor drives the clamping drive shaft to rotate. A clamping gear, mounted on the clamping drive shaft, rotates along with it. The clamping gear meshes with the serrated teeth of a misaligned clamping rod, causing the misaligned clamping rod to move under the drive of the clamping gear, thus opening and closing the clamping jaws. When the clamping jaws are closed, they firmly clamp the part to be processed, providing stable support for the chamfering operation. After the part is clamped by the clamping jaws, the chamfering drive motor starts, and its output shaft is connected to the clamping assembly to perform the chamfering operation on the part.

The application discloses a kind of welding methods of high-strength steel shell and low-strength steel inner shell penetration pipe of jacketed pressure vessel, core step includes: precision pretreatment before welding: size and defect detection, homogenization modification and preheating are carried out to machining bevel; Sequential optimization welding: the sequence of "first inside then outside" and "sectional skip welding" is combined, and prior to pipe side (high-strength steel side) is carried out backing surfacing welding; Strict welding control: the combined process of tungsten argon arc welding backing and electrode arc welding filling is used, interlayer temperature, heat input and weld size are accurately controlled; Timely and effective post-welding treatment: high-temperature post-heat treatment is carried out immediately after welding, or according to the structure constraint degree, choose whole intermediate annealing.The application effectively decomposes and releases welding stress through systematic process combination, inhibits the generation of crack, and significantly improves the welding quality and reliability of jacketed vessel penetration pipe joint.

The invention belongs to the field of semiconductor materials, and discloses gallium oxide and a synthesis method thereof. The synthesis method comprises the following steps: introducing ammonia water into a gallium nitrate solution, and continuously stirring to obtain a white turbid liquid; aging the white turbid liquid, filtering and washing to obtain an intermediate product; and calcining the intermediate product to obtain solid particles which are gallium oxide. According to the synthesis method, gallium nitrate and ammonia water are used as core raw materials, additional additives and complex precursors are not needed, the impurity introduction risk can be greatly reduced, and the high purity of the product can be guaranteed by combining washing and calcining procedures; meanwhile, the process steps are simple, the operation conditions are mild and controllable, expensive special equipment is not needed, the production cost is low, the method is suitable for large-scale production, and a gallium oxide product with good dispersity and high crystallinity can be obtained after a precursor prepared through a precipitation method is calcined and crushed.

The application discloses a kind of aluminum nitride as medium's capacitance loaded MEMS filter and manufacturing method, method includes: providing silicon substrate;Forming first metal layer on silicon substrate, and it is patterned;Forming dielectric layer on first metal layer and it is patterned;Silicon substrate is coated with photoresist and is patterned, carries out silicon hole etching, forms silicon via by thinning process;Forming patterned second metal layer on the front and back of silicon substrate;The first metal layer is as the lower electrode of capacitor, dielectric layer is as the dielectric layer of capacitor, and the second metal layer is the upper electrode of capacitor, filter resonator, via and back ground metal.End loaded capacitor mode can greatly reduce the volume of filter, the second metal layer is simultaneously as capacitor upper electrode, filter resonator, via and back ground metal, not in need additional process step to make resonator, reduce process step, realize the miniaturization of filter, satisfy SiP integration demand.

The application relates to a soluble silk fibroin pellet quick-freezing, separating and collecting device. The device comprises a low-temperature treatment tank, an external heat preservation tank, a feeding assembly, a separating assembly and an electric control system. The low-temperature treatment tank is nested in the external heat preservation tank and is adiabatic; the feeding assembly is arranged between a top cover plate and an adiabatic plate and comprises a material feeding pipe, a liquid nitrogen feeding pipe and a recovery pipe; a liquid drop pipe is arranged in the material pipe and is provided with a heating device arranged inside the liquid drop pipe to prevent freezing; liquid drops fall through the adiabatic plate into liquid nitrogen to be quickly frozen into small balls. The parameters of a stirring paddle can be adjusted to control the particle diameter, and a peristaltic pump and the specification of the drop pipe are used to control the size. The quick-frozen mixture flows into a separating tank through a low-temperature electromagnetic valve, small balls are intercepted by a screen, and liquid nitrogen is recycled. The electric control system is used for regulating and controlling stirring, the electromagnetic valve and heating power. The device can ensure resolubility through low shear quick freezing, the quick-frozen mixture can be freeze-dried in less than 24 hours due to the high specific surface area of the small balls, the cost is reduced through liquid nitrogen circulation, and the flux and particle diameter can be controlled through multi-parameter adjustment, so that the device is suitable for the preparation of silk fibroin and composite materials.

The utility model relates to the technical field of drip irrigation, in particular to a greening maintenance drip irrigation device which comprises a water storage tank, a first filter screen, a second filter screen, a water outlet pipe, a drip irrigation head, a stirring device, a chemical adding device and a moving device. A first filter screen and a second filter screen are respectively mounted in an inner cavity of the water storage tank from top to bottom, a user can add required fertilizer, insecticide or plant nutrient solution into the water storage tank through a chemical adding device, and a stirring device is started, so that the chemical is fully and uniformly mixed with water, and uniform nutrient distribution in the irrigation process is ensured; the multiple drip irrigation heads slowly permeate into soil at the roots of plants, each drip irrigation head is provided with an independent control valve, closing and starting can be selected according to the specific positions of different plants, the chemical adding device and the stirring device are used in cooperation, fertilization operation can be synchronously completed in the irrigation process, the labor cost is saved, and the working efficiency is improved.

The utility model relates to the technical field of pelletizers, and discloses an anti-blocking vibrating screen device for a discharging port of a pelletizer, which comprises a supporting seat, a discharging pipe is fixedly connected to the inner wall of the supporting seat, a first fixing plate is fixedly connected to the outer wall of the discharging pipe, and a second fixing plate is fixedly connected to the outer wall of the first fixing plate. An adjusting assembly is arranged in the discharging pipe and comprises an adjusting plate, the outer wall of the adjusting plate is slidably connected to the interior of the discharging pipe, a first connecting rod is fixedly connected to the outer wall of the adjusting plate, a single-face rack is fixedly connected to one end of the first connecting rod, and an electric push rod is fixedly connected to the inner wall of a first fixing plate. According to the utility model, the electric push rod is used for driving the double-sided rack to move, and the sliding of the adjusting plate in the discharge pipe is realized through the meshing transmission of the gear and the single-sided rack, so that the opening size of the discharge pipe can be accurately controlled, granules can be prevented from being accumulated and blocked in the discharge pipe, and the discharge flow can be flexibly adjusted according to production requirements.

The application discloses a kind of conical dielectric array InGaN quantum dot structure and preparation method, including substrate, GaN template layer, conical dielectric array layer, first InGaN quantum dot layer, first GaN barrier layer, second InGaN quantum dot layer, second GaN barrier layer;GaN template layer is grown on substrate;Conical dielectric array layer is grown on GaN template layer;First InGaN quantum dot layer is grown on GaN template layer;First GaN barrier layer is uniformly grown and completely covers on first InGaN quantum dot layer;Second InGaN quantum dot layer is grown on first GaN barrier layer;Second GaN barrier layer is uniformly grown and completely covers on second InGaN quantum dot layer;Multiple periodic InGaN quantum dot layer, GaN barrier layer, are repeatedly grown on second GaN barrier layer in sequence, form multilayer InGaN quantum dot structure.The application can realize the accurate adjustment of quantum dot density, size, distribution etc., and the grown InGaN quantum dot has the advantages of simple process and high crystal quality.

This disclosure relates to a liquid spraying device, characterized in that it includes: a control unit, a spray head, a droplet driving unit, and a liquid supply device. The control unit is configured to receive target liquid spraying information, the target liquid spraying information including the droplet volume and number of sprays per spray as set according to requirements. The droplet driving unit is configured to generate a corresponding spraying waveform signal based on the droplet volume and the number of sprays. The liquid supply device is configured to supply target liquid to the spray head in a voltage-stabilized and constant-flow manner, and the spray head, in response to the spraying waveform signal, sprays the target liquid supplied by the liquid supply device from one or more outlets with the set droplet volume and number of sprays per spray.

The utility model discloses a nozzle type aluminum alloy variable air volume valve, which particularly relates to the technical field of air valves and comprises two valve plates, two ends of the two valve plates are jointly connected with an air guide component, two blades are mounted between the two valve plates, and a linkage component is connected between the two blades. The two valve plates and the two air guide assemblies jointly form a nozzle structure, a plurality of first air inlets are formed in the inner sides of the ends of the air guide assemblies and jointly connected with a first air inlet cavity, a first air pipe is installed on the outer side of the first air inlet cavity, and a plurality of second air inlets are formed in the inner sides of the middles of the air guide assemblies. The multiple second air inlets are jointly connected with a second air inlet cavity, and a second air pipe is installed on the outer side of the second air inlet cavity. The nozzle type structure designed on the basis of the Venturi effect solves the problems of low precision and easiness in dust accumulation and blockage during differential pressure measurement, and has the advantages of high measurement precision, strong dust accumulation and blockage resistance, accurate air volume regulation and control, high processing efficiency and good product quality.

This utility model provides a sound insulation cotton cutting device, relating to the field of sound insulation cotton processing technology. It includes a workbench with a first support frame installed in the middle of its upper surface. A trimming mechanism is installed at the lower end of the first support frame. A second support frame is installed at one end of the upper surface of the workbench, and a cutting blade is movably installed at the lower end of the second support frame. This utility model utilizes two annular blades to simultaneously trim and cut both sides of the sound insulation cotton without secondary processing, significantly shortening production time, improving efficiency, and reducing time costs. Furthermore, the annular blades can be replaced according to the material thickness via a locking bolt and slider, and the spacing between the blades can be controlled to precisely control the overall size of the material after trimming and cutting, effectively improving cutting accuracy and ensuring product quality stability.

The application discloses an asymmetric hybrid mesoporous material and a preparation method and application thereof, and belongs to the technical field of mesoporous materials; the preparation method comprises the following steps: taking a template agent, a pore expanding agent and an organic silicon source as the basis, combining SiO2 nanospheres and an organic silane capping agent to prepare superstructure silicon spheres; then, the superstructure silicon spheres are dispersed in an alcohol-water mixed solvent, dopamine hydrochloride is added, and in-situ polymerization is carried out under the action of ammonia water to obtain an asymmetric mesoporous material. The material has a high specific surface area and a rich hierarchical pore structure, and the mesoporous superstructure silicon sphere constructed by the SiO2 nanospheres is one end, and the polydopamine layer is the other end. The application has the advantages of simple process and mild conditions, and the material morphology and size can be controlled by adjusting reaction parameters. When the material is applied to a water-based zinc ion battery negative electrode, the specific capacity, cycle stability and rate performance of the battery can be significantly improved, the zinc dendrite growth and side reactions can be effectively inhibited, and the material has important energy storage application value.

The utility model relates to the technical field of exposure machines, in particular to an aperture adjusting structure and an exposure machine thereof, and the aperture adjusting structure comprises an adjusting assembly, the adjusting assembly comprises a mounting cover, a first fixed disc, a first rotating disc, a light blocking block, a first limiting groove, a first inclined groove and a first limiting shaft, the first rotating disc is movably installed at the top of the first fixing disc, the light blocking blocks are located between the first fixing disc and the first rotating disc, the multiple light blocking blocks are annularly distributed, and the first limiting groove is formed in the first fixing disc. According to the utility model, the light blocking block is driven by the knob of the adjusting assembly to realize accurate adjustment of the aperture, the position of the clamping assembly is adjusted by the screw rod and the chute of the moving assembly, and flexible circuit boards with different sizes are clamped by the rotating disk and the spring structure of the clamping assembly. The problems that an existing exposure machine is inconvenient in aperture adjustment and poor in circuit board positioning and clamping are solved, and the exposure precision and the equipment universality are improved.

This invention discloses a stripe projection 3D imaging system based on a Micro-LED array. Its 3D information acquisition module consists of an integrated packaged Micro-LED driver board, a Micro-LED array, a micro-projection module, and a CCD camera. The 3D reconstruction module utilizes a computer. The micro-projection module is equipped with a plano-convex lens and a mechanical focusing damping structure, and is separately arranged in the front and rear optical paths of the Micro-LED array. The system's workflow is as follows: the driver board reads pre-stored stripe pattern data and timing-controls the Micro-LED array to output coded structured light stripes; the focusing structure adjusts the object distance in the optical path, focusing and scaling the stripes before projecting them onto the surface of the object being measured; the CCD camera simultaneously acquires a sequence of deformed images modulated by the object's shape and transmits it to the computer; the computer combines a multi-step phase-shifting algorithm and Gray code rules to complete phase calculation and unfolding, and, combined with a preset phase-height mapping relationship, reconstructs the 3D shape and point cloud data of the object being measured. This invention enables low-cost, miniaturized, and high-performance 3D shape measurement.

The invention relates to a substrate surface functionalization modified micro-fluidic chip and a crystallization control method, and solves the technical problem of how to use the micro-fluidic chip to accurately control the crystallization process, the substrate comprises a substrate and a cover plate, the substrate is provided with patterned SAMs, the cover plate comprises an upper layer and a lower layer, the upper layer is provided with a gas channel and a gas accommodating chamber, and the lower layer is provided with a gas outlet. The upper layer is provided with a gas input through hole, a gas output through hole, a liquid input through hole and a liquid output through hole, the lower layer is provided with a liquid channel and a reaction chamber, the lower layer of the cover plate is bonded with the substrate, and the patterned SAMs are located in the reaction chamber. The method is suitable for precise preparation of drug crystals, biological materials, ceramic materials, nanometer materials and optical elements, and can be widely applied to the industries of pharmacy, biomedical engineering, advanced material synthesis and the like.

The utility model discloses a kind of micro rod-shaped motor sliding table, it is related to motor sliding table technical field, including motor sliding table body and the base and slider of being set on motor sliding table body, rod-shaped motor body is arranged on the motor sliding table body, rotor is installed on the rod-shaped motor body, stator is also arranged in the rod-shaped motor body, guide rail is arranged on the motor sliding table body, the base is set on guide rail, the utility model is driven by high-efficiency electromagnetic design and permanent magnet, the size and direction of ampere force can be accurately controlled, so that the motion response of motor sliding table body is rapid, control precision is high, one-way positioning accuracy is significantly improved compared with the sliding table of traditional screw rod structure, avoid complex mechanical transmission structure, reduce the mechanical loss of device, and overall size is smaller, can be placed in narrow space, improve the stability of device operation.

The oil injection slicing system for the molded tiles comprises an oil injection machine, a slicing machine and an inspection machine, the oil injection machine and the slicing machine are both provided with transmission rollers, the oil injection machine carries an oil injection system through a first support, and a roller brush set is arranged below the oil injection system. A first sensor is arranged on a second support at the front end of the slicer, a first sliding rail and a cutting device are arranged in the middle of the slicer, the cutting device comprises a mounting seat, a slicing device and a corner cutting device, a first driving system is arranged in the slicer, and a recycling device is arranged at the bottom of the slicer. The first conveying belt is connected with the slicing machine, the inspection machine is arranged on the first conveying belt, a removing device is arranged on the third support, a second driving system and a second sensor are arranged at the top of the removing device, and a third sensor is arranged on the removing device. The slicing machine is provided with a control system, and the control system is electrically connected with the first sensor, the second sensor, the third sensor, the recycling device, the first driving system, the second driving system and the first conveying belt.

This disclosure provides a method for fabricating a laser chip. An electrically isolated layer group comprising a first N-type InP layer, a second N-type InP layer, and a first active layer are sequentially grown on a substrate. A second active layer is grown outside a first position of the first active layer. First and second electrically isolated layers and a conductive layer are grown at the interface between the first and second active layers. Second and third P-type InP layers and a contact layer are sequentially grown on the first active layer, the conductive layer, and the second active layer. A second position of the contact layer is etched down to the third P-type InP layer. Both the first and second contact layers are etched down to the first N-type InP layer. A passivation layer is grown and etched down to the first and second contact layers and the first N-type InP layer. Positive and negative electrodes are grown. In this disclosure, the substrate is conductive, avoiding the problem of charge accumulation on the substrate surface leading to internal electric field distortion. The electrically isolated layer group prevents current from flowing from the second N-type InP layer into the substrate. The first N-type InP layer is conductive, enabling the positive and negative electrodes to conduct.

This invention provides a torque angle logic control method and control system, a rolling connection device, a storage medium, and an electronic device. The method includes: employing an independent angle control method, setting a target angle for the motor spindle during the rolling process, acquiring the real-time angle of the motor spindle during the rolling process, and controlling the operation of the motor spindle of the rolling connection device based on the real-time angle and the target angle; when the real-time angle reaches the set target angle during the rolling process, the motor spindle of the rolling connection device automatically reverses and exits. This invention effectively ensures the stability and consistency requirements of the product and meets the expected service life of the product.

The application discloses a glass microporous vacuum adsorption device with optical flatness and a manufacturing method thereof, and belongs to the technical field of precision machining and semiconductor manufacturing. The vacuum adsorption device comprises a glass substrate and an equalizing structure in communication with the glass substrate. The glass substrate is provided with a through micropore array manufactured by using an ultrafast laser processing technology. The micropore array is composed of a plurality of micropores penetrating along the thickness direction of the glass substrate. The micropore array is formed by ultrafast laser-induced modification and selective chemical etching. After the through micropores are formed, no additional surface polishing treatment is needed to maintain the optical flatness of the adsorption surface. The equalizing structure is in communication with an external vacuum system through a suction port to form a uniform negative pressure distribution on the adsorption surface. The vacuum adsorption device is suitable for adsorbing and fixing an ultrathin wafer. The application can realize uniform adsorption and reduce the risk of warping and scratching.

The utility model discloses a mutton processing thawing pool relates to mutton thawing technical field, including bearing seat, the bearing seat upper end is equipped with the collecting port, the bearing seat lower extreme mounting has the drainage frame. The utility model discloses the bearing seat, drainage frame, thawing pool frame, movable tank, filter screen, sliding slot and rack that set up, the bearing seat as the basis of whole equipment, provides the firm support for thawing pool, ensures when the multiple thawing pool frame of placing and the thawing water containing, equipment can keep stable, avoids the shaking or displacement because of the bearing too big, in the thawing process, the water flow can enter each thawing pool frame in order through the drainage frame, guarantees every piece of mutton to be able to fully contact thawing water, also helps when the water or drainage, let water can flow out smoothly, avoids the waterlogging phenomenon influence thawing efficiency or causes the operation inconvenient.

The application discloses a high-performance oxygen evolution reaction composite electrocatalyst and a preparation method thereof, and belongs to the field of electrocatalytic material preparation. The application solves the problem that it is difficult to realize uniform loading and precise size control of RuO2 nanoparticles on a three-dimensional porous complex substrate (foamed nickel), thereby affecting the performance and repeatability of the prepared electrocatalyst. The method comprises the following steps: sulfidizing the foamed nickel with thiourea first, and then uniformly depositing RuO2 nanoparticles on the surface of the foamed nickel-based Ni3S2 by using an ALD technology. The application precisely controls the size of the RuO2 nanoparticles on the surface of the foamed nickel-based Ni3S2 to be 1.5-3.5 nm, and the surface density to be 0.8-1.2´10 12 / cm 2 , so that the conductivity and electrochemical activity of the catalyst can be improved, the charge transfer rate can be improved, and the OER performance of the electrocatalyst is improved.

The present application relates to the technical field of functional food materials and bio-based composite material preparation, and in particular to a high-strength sodium alginate-starch composite emulsion gel, a preparation method and application thereof. First, gelatinized starch is homogenized with sucrose fatty acid ester and vegetable oil to prepare a starch composite emulsion, and a stable emulsion system is formed by short straight-chain starch in the starch composite emulsion and vegetable oil; then the emulsion is mixed with a sodium alginate solution, and a calcium alginate network and a starch-oil composite enhanced double-network structure are constructed through pre-freezing immobilization treatment combined with a low-temperature slow calcium ion crosslinking process, thereby solving the problems of weak strength of existing sodium alginate-based emulsion gels, unstable oil and fat embedding, and difficulty in meeting complex food processing conditions, and providing an ideal animal fat replacement material for the development of healthy meat products.

This invention relates to the field of winding and stamping technology, and discloses an integrated winding and stamping equipment for producing tolerance rings. The equipment includes a support and positioning mechanism, with a winding production mechanism and a size control mechanism connected to one side of the support and positioning mechanism. The size control mechanism includes a guide seat and a positioning disk. A positioning helical gear ring is rotatably connected to one side of the positioning disk, and multiple positioning helical gears are meshed on the tooth surfaces of the positioning helical gear ring. Multiple positioning frames are fixedly connected to the outer wall of the positioning disk. This invention uses a drive motor in the size control mechanism to drive the control gears and the positioning helical gear ring to rotate, thereby adjusting the positions of multiple positioning screws and moving seats. This achieves rapid positioning and adjustment of tolerance rings of different sizes, eliminating the need for frequent replacement of production components, significantly improving production efficiency and flexibility. It integrates the two key processes of winding forming and stamping cutting into one machine, reducing the transfer and waiting time of workpieces between different processes, further improving production efficiency.

The utility model discloses a horizontal bottom seat flexible interface double rubber ring reinforced concrete pipe production device relates to reinforced concrete pipe production technical field, and it is including: base, outer mould, inner mould, jacking mechanism and traction mechanism, and the inner mould is seamless hollow cylinder, and the inner mould is used to install in the outer film, to form the pouring space of double rubber ring reinforced concrete pipe between the outer mould and the inner mould, and one end of the inner mould is provided with jacking part, and the other end is provided with traction part, the jacking mechanism is set up in the one side of base, when the strength of double rubber ring reinforced concrete pipe reaches 70%~75% of design strength, and the jacking mechanism jacks up the jacking part to make the initial separation gap between the inner mould and double rubber ring reinforced concrete pipe, the traction mechanism is set up in the one side of base away from the jacking mechanism, and the traction mechanism is used for connecting with traction part to pull out the inner mould horizontally, simple structure, convenient to use, effectively solve the horizontal production process to face the inner mould demoulding problem, effectively improve the inner wall forming quality.

This invention relates to a thermo-responsive nanocarrier based on a biomass core, its preparation method, and its applications. First, using hydroxyl-containing biomass materials such as cyclodextrin and cellulose nanocrystals as a core, a macromolecular initiator with ATRP initiating groups modified on its surface is prepared through an acylation reaction. Then, the macromolecular initiator is mixed with thermosensitive monomers such as N-isopropylacrylamide for ATRP polymerization to obtain a thermo-responsive nanocarrier. Next, the thermo-responsive nanocarrier is blended with functional reagents such as antibacterial agents to obtain a supported thermo-responsive nanocarrier. Finally, the supported thermo-responsive nanocarrier is mixed with a matrix material such as textile fibers to obtain a supported thermo-sensitive functional material. The preparation method of this invention has the advantages of simple process, green and controllable characteristics, and the obtained thermo-responsive nanocarrier can be widely used in the field of functional materials in light industries such as textiles, leather, and footwear, endowing related products with various intelligent properties.

This invention discloses a graphene-based silicon waveguide polarization filter, comprising a silicon substrate, a silicon dioxide lower cladding, a silicon waveguide, a polymer waveguide, and a silicon dioxide upper cladding, arranged sequentially; the polymer waveguide contains graphene. The graphene concentration ranges from 0.1 mg / ml to 1 mg / ml. A method for fabricating the graphene-based silicon waveguide polarization filter is also disclosed. First, a silicon dioxide lower cladding is fabricated on the upper surface of the silicon substrate. Then, a silicon thin film is fabricated on the upper surface of the silicon dioxide lower cladding. The silicon thin film is then patterned to form a silicon waveguide. Graphene is incorporated into EPO polymer photoresist, and a graphene-containing polymer waveguide is fabricated on the upper surface of the silicon waveguide. Finally, a silicon dioxide upper cladding is fabricated on the surface of the graphene-containing polymer waveguide. This invention enables precise control and patterning of the position, thickness, and size of the graphene-containing polymer waveguide, making it suitable for the precise and efficient fabrication and widespread application of polarization filters.

The invention belongs to the technical field of magnetic resonance imaging nano diagnosis and treatment agents, and particularly relates to a preparation method of a shape-controllable nonmetal magnetic resonance imaging nano diagnosis and treatment agent. According to the preparation method, 2-(perfluorooctyl) ethyl methacrylate (HDFDMA) and methacrylic acid-2, 2, 6, 6-tetramethyl-4-piperidinyl ester (m-TEMPO) are taken as monomers to prepare shape-controllable sugarcoated haw-shaped nano-particles (WNPT), electronegative tannic acid (TA) is loaded after oxidation, and the shape-controllable sugarcoated haw-shaped nano-particles are prepared through a polymerization-induced self-assembly method. The nanometer diagnosis and treatment agent TA (at) WNPT with a magnetic resonance imaging (MRI) function and a colitis treatment function is obtained. According to the method disclosed by the invention, polymerization and assembly are synchronously carried out under the condition of high concentration, and the morphology, size and surface chemical characteristics of the nanoparticles are accurately regulated and controlled. It is proved for the first time that in the nonmetal MRI probe, compared with spherical particles, the sugarcoated haw-shaped structure can remarkably improve the MRI performance.

This invention belongs to the field of SERS detection, specifically relating to a double-shell Ag-ZnAl2O4-MOF composite material, its preparation method, and its application in trace detection of organic pollutants. First, ZnAl2O4 nanoparticles are synthesized using a hydrothermal method. Then, the prepared ZnAl2O4 nanoparticles are placed into a prepared MOF growth solution to form a ZnAl2O4-MOF composite structure. Further composite with Ag nanoparticles is then formed to create the double-shell Ag-ZnAl2O4-MOF composite material. The Ag-ZnAl2O4-MOF composite substrate exhibits a synergistic effect of physical and electromagnetic reinforcement. Furthermore, due to the large specific surface area, porosity, and multiple metal sites of the intermediate MOF layer, more hot spots can be formed. The charge transfer effect generated by the composite with ZnAl2O4 produces an electromagnetic reinforcement effect. These characteristics effectively enhance the SERS signal intensity.