21 results about "Microplasma" patented technology

An in-chamber plasma source in a deposition reactor system includes an array of microcavity or microchannel plasma devices having a first electrode and a second electrode isolated from plasma in microcavities or microchannels. An inlet provides connection to deposition precursor. A region interacts deposition precursor with plasma. An outlet directs precursor dissociated with the plasma onto a substrate for deposition. A reactor system includes a substrate holder across from the outlet, a chamber enclosing the in-chamber plasma source and the substrate holder, an exhaust from the chamber, and conduit supplying precursors from sources or bubblers to the inlet. A reactor system can conduct plasma enhanced atomic layer deposition at high pressures and is capable of forming a complete layer in a single cycle.

The application discloses a kind of metal organic framework materials, preparation method and its application in photodynamic sterilization, it is related to biological medicine technical field, preparation method includes, and it is prepared to A solution by dissolving with the preparation of mid-four (4-carboxyl phenyl) porphyrin is added N,N-dimethylformamide;Scandium chloride hexahydrate is dissolved in ultrapure water, and B solution is prepared;The A solution and B solution prepared are mixed, and are treated with ultrasound, so that two kinds of solutions are fully mixed to prepare mixed solution;The mixed solution is treated with microplasma;After the mixed solution treated with microplasma is centrifuged, and metal organic framework solid is obtained.The application uses microplasma treatment to provide a large number of high-energy electrons in discharge process, promotes the rapid deprotonation of organic linker, has the advantages such as small volume, low energy consumption, simple and fast and reagent green.

The invention discloses a coaxial dielectric barrier discharge micro-plasma multi-dimensional element compound detection device which comprises a capillary column assembly and a capillary column interface assembly, the capillary column assembly is provided with a gas transmission channel extending in the axial direction of the capillary column assembly, one end of the capillary column assembly is a capillary gas inlet end, and the other end of the capillary column assembly is connected to the capillary column interface assembly. A conical contraction connector is arranged in the capillary column connector assembly, and the conical contraction connector is gradually transited from the large section to the small section in the gas flowing direction. The plasma discharge cavity is communicated with the capillary column interface assembly and extends along the axial direction; and a first electrode and a second electrode are wound outside the plasma discharge cavity. And a medium tube is arranged between the first electrode and the second electrode. And the first electrode and the second electrode are electrically connected with a high-voltage converter power supply. One end of the plasma discharge cavity away from the capillary column interface assembly is provided with a plasma lighting window; an optical detection assembly is arranged on the outer side of the plasma discharge cavity.

This invention relates to a hydride generation gaseous sample introduction method and apparatus for heavy metal element determination in conjunction with a liquid cathode glow discharge-atomic emission spectrometer, belonging to the field of atomic spectroscopy metal element analysis technology. This invention uses chemically generated carbon dioxide gas as a carrier gas, which is then used as the atmosphere gas in the liquid cathode glow discharge to ionize and generate micro-plasma. The chemical hydride generation method converts the applicable analyte element into a hydride, which is then carried into the micro-plasma by the carbon dioxide carrier gas, atomized, and excited to generate an emission spectrum.

A fabrication tool has at least one flat lamp photon source, or an array of flat lamps, that serve to non-thermally ablate polymer material from a surface. No photoresist is required and the desired photoablated pattern is determined by inserting a photolithographic mask between the lamp(s) and the surface to be processed. Methods of the invention pattern organic polymer and can pattern a substrate using a pattern established in an organic polymer layer on the substrate, and can also deposit materials in the pattern by breaking bonds in deposition precursors with photons from the microplasma array. Another method converts organic polymer material to have a hydrophylic surface. A tool of the invention can have width and depth comparable to a typical paperback book and a height comparable to a coffee cup.

The application relates to the field of molten salt electrochemistry, in particular to application of normal-pressure micro-plasma discharge in preparation of nano uranium dioxide particles. The normal-pressure plasma discharge can be used for synthesizing nano uranium dioxide particles with high crystallinity in molten salt, the prepared uranium dioxide product has good crystallinity, high purity and excellent oxidation resistance, and the product particle size is between 20-200 nm.

The invention discloses a manufacturing method for inhibiting generation of burrs on a pole piece and the pole piece. The manufacturing method comprises the following steps: S1, preparing slurry, and adding a self-repairing material; s2, coating: carrying out biaxial orientation stretching treatment on the current collector; s3, drying, wherein three-stage temperature control is adopted; s4, calendering, wherein asymmetric rolling is adopted; s5, cutting is conducted, ultrasonic softening pretreatment is conducted firstly, and a composite cutting technology is adopted; and S6, edge treatment is carried out, and a micro-plasma polishing technology is adopted. Microcracks generated in the cutting process can be repaired through a self-repairing material adding technology; the biaxial orientation treatment of the current collector improves the mechanical property and isotropy of the current collector; the ultrasonic softening pretreatment reduces the cutting resistance and reduces the generation of burrs; and edge burrs are accurately removed through micro-plasma polishing. According to the invention, the burr height and density of the pole piece are obviously reduced, the safety and cycle performance of the battery are improved, and the problems of battery short circuit and safety risk caused by pole piece burrs are solved.

The application provides a system and method for quantitatively determining nanometer plastics in an aqueous solution, and belongs to the technical field of environmental analysis and detection. The system comprises: a carrier gas supply unit for providing carrier gas and regulating the flow rate of the carrier gas, a programmed heat treatment unit, a three-way valve, a drying unit, a microplasma excitation and spectrum detection unit, a data processing unit and a control unit. The entire system is built based on miniaturized electrothermal evaporation and microplasma excitation technology, has the characteristics of low energy consumption and compact structure, has the potential to develop into a field quantitative screening device, and provides a new practical technical scheme for accurate quantitative monitoring of nanometer plastics in environmental water.

Disclosed is a modular commercial food storage, sterilization, and drinking water supply system. The system comprises a food storage and drinking water supply apparatus, a user terminal, and an administrator terminal. The food storage and drinking water supply apparatus includes a solar power unit installed on an upper portion of the apparatus, an energy storage unit configured to store electric power, an ozone generation unit configured to receive power stored in the energy storage unit and generate ozone to be provided to a drinking water purification unit and a food processing management unit through an advanced oxidation process using microplasma, a food processing management unit configured to sterilize food using ozone generated from the ozone generation unit and deliver ozone into a food storage space, and a drinking water purification unit configured to purify drinking water by receiving ozone generated from the ozone generation unit.

The invention belongs to the field of portable and trace detection of pollutants, and particularly relates to an aM-level detection method of perfluorooctanoic acid. The method comprises the following steps: firstly, triggering enzyme-free catalysis hairpin assembly by using a PFOA aptamer to generate double-stranded DNA to activate a CRISPR-Cas12a system, so as to realize target cyclic amplification and signal transduction; a DNA signal is converted into a copper element signal through a gold-core copper-shell nanoparticle labeling strategy, and multi-stage signal amplification is achieved; and finally, quantifying a Cu signal at 327 nm by adopting a capillary tube-micro plasma emission spectrometer driven by a self-developed lithium battery. The detection limit of the platform to PFOA reaches 0.50 aM, which is 4 orders of magnitude lower than the American EPA standard; the linear range spans 6 orders of magnitude (2.5 aM-2.5 pM); the standard addition recovery rate of 6 kinds of complex environment water samples (landfill leachate, breeding wastewater and the like) and 3 kinds of dairy products is 95.54%-108.63% (RSDlt; 5%).

A method for manufacturing a distributed Bragg reflector is provided. The distributed Bragg reflector is applied to a 1550 nm vertical-cavity surface-emitting laser, which structurally includes a top distributed Bragg reflector, a bottom distributed Bragg reflector, and a vertical cavity (including a P-type and an N-type electrode) and a multiple quantum well light-emitting layer that are positioned therebetween. An optical multilayer film of the distributed Bragg reflector is formed by sputtering, and includes silicon layers and silicon dioxide layers alternately stacked to each other. The silicon dioxide layers are produced by a process of nano-sputtering and micro-plasma oxidation. A reflectance of the bottom distributed Bragg reflector at 1,550 nm is greater than 99.9%, and a reflectance of the top distributed Bragg reflector at 1,550 nm is controlled to be between 95% and 99%, so that basic physical / optical requirements for forming a resonant laser can be improved.

The invention discloses a 3D printing pump-free sample injection point discharge atomic emission spectrum analysis device and method for detecting arsenic, and belongs to the technical field of atomic emission spectrum analysis. Comprising a 3D printing integrated device, an external gas path system and a spectrum detection system, the 3D printing integrated device comprises a 3D printing module, a quartz glass sheet, a quartz capillary tube, two tungsten filament electrodes and a microsyringe; the external gas path system comprises a small argon steel cylinder, two argon pipelines, a gas flow meter and a trace gas flow meter; the spectrum detection system comprises an optical fiber and a small CCD spectrometer. The method comprises the following steps: injecting an arsenic-containing solution sample into a reaction chamber of a 3D printing device by using a microsyringe, converting the arsenic-containing solution sample into a gaseous analyte through hydride generation, blowing the gaseous analyte into a discharge chamber by argon, exciting an atomic emission spectrum of arsenic by using micro plasma, radially collecting a spectral signal from the outside of a quartz capillary by using a bare optical fiber, and transmitting the spectral signal to a CCD (Charge Coupled Device); and finally, the concentration of the arsenic in the sample can be obtained through calculation. The method has the characteristics of high excitation efficiency, strong anti-interference capability, low cost, open source sharing, environmental friendliness and the like.

The present application relates to the technical field of pesticide detection, and provides a method for determining dithiocarbamate pesticides based on a tandem microplasma-emission spectrum, which comprises the following steps: using stannous chloride-hydrochloric acid (SnCl2-HCl) solution as a reducing agent, separating DTCs pesticides by liquid chromatography (LC), exciting the SnCl2-HCl system by a first-stage liquid electrode glow discharge (LEGD) microplasma to reduce the DTCs pesticides into carbon disulfide (CS2) in real time, exciting CS2 to emit a spectrum by a second-stage dielectric barrier discharge (DBD) microplasma, thereby forming a LEGD reduction-DBD determination tandem microplasma system, and achieving the detection of dithiocarbamate pesticides, wherein the method has the advantages of real-time, accuracy, rapidity, simplicity, and the ability to analyze each subclass of DTCs pesticides, and meets the requirement of rapidly determining dithiocarbamate pesticide residues in fruits and vegetables in a short period of time.

This invention provides a low-temperature micro-plasma jet generator and its preparation method, comprising: an ultrasonic jet generator for generating ultrasonic jets; and a micro-plasma generator for generating plasma; wherein the ultrasonic jet generator and the micro-plasma generator are integrated into a single, sheet-like structure. The ultrasonic jet generator is located in the middle of the micro-plasma generator, effectively enhancing the transverse wave effect of negative oxygen ions and ozone waveguides through the ultrasonic jet effect. This invention integrates the ultrasonic jet effect and the generation of low-temperature micro-plasma, effectively solving the problem of low transverse waveguide efficiency for the propagation of low-temperature negative oxygen ions and ozone. It can be used in plasma disinfection and sterilization scenarios, providing an effective approach for the miniaturized integrated manufacturing of related products.

The invention relates to a triboelectric reactor device with microplasma discharge for the production of hydrogen from an aqueous electrolyte. The device comprises a translucent outer body and a dielectric inner body that define an intermediate cavity containing the electrolyte and an internal cavity. A triboelectric strip arranged on the outer surface of the inner body, with alternating zones of electronegative material and exposed substrate, generates electrical charge through solid-liquid interaction. This charge, optionally enhanced by a pyroelectric element subjected to thermal variations, accumulates in a multilayer capacitive architecture. Upon exceeding a threshold, a dielectric barrier microplasma discharge is generated between an emitting electrode tip and the inner body, producing reactive species and ultraviolet radiation that promote the dissociation of water into hydrogen.The system can operate autonomously without an external power source and can simultaneously generate plasma-activated water as a byproduct.

The present invention is related to a production method of porous materials comprising steps of: providing a micro-plasma system, which includes an anode, a cathode, and a reaction solution. The said anode is at least partially immersed in the reaction solution, while the cathode is a tube with its opening positioned near and above the reaction solution with a gas introducing to the opening. After applying a current to the micro-plasma system, a micro-plasma reaction occurs, resulting in the formation of a porous material in the reaction solution. The aforementioned reaction solution contains an amine precursor, an aldehyde precursor, and an electrolyte, and especially does not include any toxic or volatile organic solvents. The present invention presents a novel method for producing porous materials with simple and rapid steps without the need for volatile or toxic organic solvents, making the process more environmental friendly, cost-effective and high yielding rate.

This invention relates to the fields of analytical detection and online solid-phase extraction technology, specifically to a rapid detection method for trace plasma samples used in pharmacokinetic studies. The method first measures the empty baseline pressure; after injection, it calculates the net sample pressure and total resistance integral in real time, and identifies the transition point from injection to cleaning to lock the fluid dynamics boundary parameters; during the cleaning phase, it calculates the measured pressure decay rate and extrapolates the theoretical pressure decay rate under ideal emptying conditions, uses the total resistance integral to compensate for viscosity at the measured rate, and then obtains the flow hysteresis ratio characterizing the sample matrix retention effect based on both; finally, it uses the flow hysteresis ratio to adaptively correct a standard threshold to obtain a target threshold, and performs flow path switching when the measured rate reaches the target. This invention effectively decouples sample viscosity from adsorption characteristics, enabling adaptive adjustment of the cleaning time based on real-time sample kinetic feedback, completely eliminating matrix residue contamination while ensuring the recovery rate of polar drugs.

The invention discloses a uranium oxide molten salt electrolytic reduction and molten salt spectrum online analysis method and device based on a micro-plasma anode array. The device comprises a micro-plasma anode array, a high-voltage direct-current power supply, a gas control system and a spectrum collection device. According to the method, the micro-plasma array is creatively used as an electrolytic anode and a spectrum excitation source at the same time, the atomic emission spectrum of the molten salt can be excited and collected in situ while efficient electrolytic reduction of uranium oxide such as uranium dioxide is achieved to prepare metal uranium, and therefore element components such as cesium in the molten salt can be monitored online in real time. The device solves the industrial problems that a traditional anode is easy to corrode and fused salt components are difficult to analyze in situ, has the advantages of being high in corrosion resistance, good in stability, dual-purpose and sensitive and efficient in analysis, and has wide application prospects in the field of nuclear fuel dry post-treatment.

The invention provides a three-dimensional enhanced SCGD-OES device and a heavy metal detection method, and relates to the technical field of spectrum detection and analysis. A solution cathode unit, a main discharge anode unit and a multi-point discharge enhancement unit are arranged in the excitation chamber; and the multi-point discharge enhancement unit comprises at least two pairs of point discharge electrodes which are arranged in a spatially crossed manner, are positioned below the main discharge channel and are used for generating point discharge micro-plasmas which are spatially coupled with the main discharge channel, so that a three-dimensional synergistic discharge region is formed near a solution interface. The three-dimensional structure expands an effective discharge area, enhances the interaction between plasma and a solution, and improves the atomization and excitation efficiency of an analyte. The emission signal intensity and the detection sensitivity of heavy metal elements are greatly improved, the detection limit is as low as 0.06-1.90 mu g L <-1 >, and the device is compact in structure, good in stability and suitable for on-site, rapid and multi-element simultaneous detection of trace heavy metal in complex samples such as environmental water samples and food.

The invention relates to the technical field of micro-plasma emission spectrum detection, in particular to a micro-plasma emission spectrum detection device which comprises a sample injection system and a detection system. The sample introduction system consists of an electric heating evaporation sample introduction pipe and a micro plasma reaction pipe which are communicated through a gas homogenization treatment pipeline. The turbulent flow mixing pipeline is connected with the tail end of the electric heating evaporation sample injection pipe, the outer side of the turbulent flow mixing pipeline is sleeved with the mixing regulation and control mechanism, and the turbulent flow mixing pipeline and the mixing regulation and control mechanism cooperate to realize rapid homogenization of gas; the connecting pipeline is fixedly connected with the tail end of the turbulence mixing pipeline, the outer side of the connecting pipeline is connected with the angle adjusting frame, the micro-plasma reaction tube is sleeved in the frame to be communicated with the connecting pipeline, the connecting angle of the two tubes in different detection modes can be adjusted through the angle adjusting frame and the micro-plasma reaction tube, various detection requirements are met, the application range of the device is effectively widened, and convenience and practicability are achieved.