104 results about "Molecular diffusion" patented technology

The invention discloses a dough humidity and temperature dynamic regulation and control system based on multi-modal sensor fusion, and relates to the technical field of operation parameter regulation and control, and the method comprises the steps: carrying out the non-blind area monitoring of a three-dimensional temperature and humidity field in a fermentation box, and eliminating the local failure risk of a point-type sensor; capturing a space-time coupling relationship of temperature and humidity-carbon dioxide concentration-dough volume through a self-attention mechanism; constructing a differential equation set comprising at least one state variable; establishing a fermentation equipment thermodynamic model, optimizing refrigeration and heating time sequences through reinforcement learning, and designing an energy consumption optimization strategy based on digital twinning; performing cross-device cooperative control; constructing a hierarchical diagnosis tree containing fault features; performing microbial activity enhanced humidity regulation and control, and forming a protective layer on the surface of the dough based on a humidity gradient control algorithm of a water molecule diffusion coefficient. And by arranging the environment regulation and control module, the time compression module and the time sequence optimization module, the product quality, the production efficiency and the energy utilization rate are remarkably improved.

This information processing device comprises: a molecular dynamics calculation means for calculating the motion of a molecular group including atoms and / or molecules using molecular dynamics calculation; an average square displacement calculation means for calculating an average square displacement for each atom and molecule; a diffusion coefficient calculation means for calculating a diffusion coefficient for each atom and molecule on the basis of the average square displacement for each atom and molecule; a fitting means for fitting the cumulative probability of the diffusion coefficient with a cumulative distribution function; and a diffusion coefficient determination means for determining a diffusion coefficient for the molecular group on the basis of the fitted cumulative distribution function.

The invention relates to analcime with an ANA structure and a preparation method of the analcime, the chemical molecular formula of a unit cell of the analcime with the ANA structure is Na < x > [SiyAlzO96], x is equal to 6-15, y is equal to 30-37, and z is equal to 10-16; the analcime with the ANA structure has a spherical crystal morphology. The analcime with the ANA structure disclosed by the invention has a spherical crystal morphology, shows excellent molecular diffusion performance, and has a good application prospect in the fields of small molecular acid catalytic reaction, small molecular gas adsorption separation, ion adsorption purification and the like.

The invention discloses a graded porous guanidyl resin-based CO2 adsorption material and a preparation method thereof, and belongs to the technical field of polymer synthesis. The prepared adsorption material is of a composite spherical structure and has a multi-stage pore channel structure including micropores, mesopores and macropores, the CO2 adsorption capacity of the material is effectively improved by introducing the hierarchical pore channel structure, the molecular diffusion resistance can be remarkably reduced by introducing hierarchical pore channels, and the contact area of an adsorbent and CO2 molecules is increased, so that rapid adsorption is achieved; and the pyridyl, the polyamino compound and the guanidyl have relatively strong alkalinity and chemical affinity to CO2, and through surface functional modification, active sites on the surface of the material are remarkably increased, so that the adsorption capacity and selectivity of CO2 are further improved.

The invention provides a hierarchical pore zeolite molecular sieve as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) pretreating a hydrogen-type zeolite molecular sieve at 500-600 DEG C to obtain a pretreated hydrogen-type zeolite molecular sieve; 2) in an inert gas environment, cooling the pretreated hydrogen type zeolite molecular sieve to 300-500 DEG C, introducing an inert gas containing a carbon source into the system, and carrying out carbon pre-deposition treatment to obtain a carbon pre-deposited zeolite molecular sieve; and (3) sequentially carrying out alkali treatment, roasting treatment, acid pickling treatment and drying treatment on the pre-carbon-deposited zeolite molecular sieve to obtain the hierarchical pore zeolite molecular sieve. Through carbon pre-deposition treatment, carbon deposition layers are formed on the surface and in the zeolite, disordered etching of alkali is resisted, and the hierarchical pore zeolite molecular sieve with rich mesopores and micropore structures is obtained. The prepared hierarchical pore zeolite has good molecular diffusivity as a methanol-to-olefin catalyst, and the conversion rate of methanol and the service life of the catalyst are both improved.

The invention discloses a method for improving SERS (Surface Enhanced Raman Scattering) detection sensitivity. The method comprises the following steps: preparing a solution of an object to be detected by using a mixed solvent, and carrying out SERS detection, wherein the mixed solvent is composed of a first solvent and a second solvent, the surface tension and wettability are controlled by adjusting the proportion of the mixed solvent, molecules of an object to be detected are promoted to enter the SERS substrate, and hot spots are activated. According to the method, two or more solvents are mixed, the surface tension of the mixed solvent and the wettability of the mixed solvent to the SERS substrate are adjusted, so that the substrate wettability and the molecular diffusion characteristic are balanced, conveying of the solvents in a nanostructure is accurately controlled, and effective molecular mass transfer is achieved; the method disclosed by the invention has the advantages of universality, high reproducibility, high sensitivity and simplicity and rapidness in operation, provides a new solution for an SERS detection method, and has a wide application prospect; the detection limit of the SERS substrate can be generally improved by 2-3 orders of magnitude.

The invention discloses a DNA tracer migration prediction and site flow field description method, and belongs to the field of environmental rock and soil. According to the method, Laplace transform, Fourier transform and numerical inversion are used for obtaining the expression of the concentration of the DNA tracer in a fast region and a slow region. On the basis, necessary model parameters such as a tracer molecular diffusion coefficient, aquifer thickness, dispersity and tracer injection attenuation rate are determined according to hydrogeological conditions disclosed by a stratum and a tracer concentration monitoring result of an injection well in a field tracer experiment. And an analytical solution provided by genetic algorithm coupling is adopted, and the fitting degree of a tracer output curve of a monitoring well and a prediction result is taken as a control quantity, so that the average linear flow velocity and the porosity of the fast area and the slow area of the field soil are determined, and the fine description of the flow field in the field heterogeneous soil is realized. The method combines an analytical model, a genetic algorithm and a field tracer experiment, the obtained prediction result is accurate and objective, calculation is convenient and fast without depending on software, and the method is suitable for engineering application.

The invention provides a nanofiltration membrane with a double-layer multi-dimensional structure and a preparation method of the nanofiltration membrane, and belongs to the technical field of nanofiltration membranes. According to the preparation method, a lithium salt-alkali composite catalyst is added into a water-phase solution, and the interfacial polymerization rate, the molecular diffusion behavior and the interfacial reaction kinetics are regulated by regulating and controlling the ionic strength, the pH dynamic balance and the oriented growth of a nanostructure, so that the high-performance polyamide nanofiltration membrane with a layered multi-dimensional structure is prepared. The high-performance polyamide nanofiltration membrane with the layered multi-dimensional structure shows an excellent separation effect in a natural surface water treatment process, particularly shows excellent performance in the aspect of removing perfluoro and polyfluoroalkyl substances, and has wide application potential.

The invention belongs to the technical field of dynamic simulation, and discloses a construction method of a molecular dynamic model for different bubble contents of ice and methane hydrate, and the method comprises the following specific steps: 1, selecting a crystal structure of the ice and methane hydrate as a model basis for initial structure construction; by constructing a molecular dynamic model of an ice and methane hydrate coexistence system, the problem of extensive quantitative regulation and control of bubble content is solved, accurate association of microscopic molecule removal and macroscopic volume fraction is realized, force field parameter suitability of a cross-phase interface is optimized, interaction of a hydrogen bond network and molecules at an ice and methane hydrate interface is accurately described, and the method has the advantages of simple operation and low cost. The simulation precision of the molecular diffusion behavior and the structural stability of the interface area is improved, meanwhile, the bubble form diversity and the temperature and pressure coupling environment are comprehensively considered, a multi-dimensional experimental verification system is established, and the influences of different bubble contents on the thermodynamic property, the dynamic behavior and the mechanical property of the system can be systematically evaluated.

The invention discloses a two-dimensional field effect transistor with high-temperature thermal stability and a preparation method thereof, and mainly solves the problem that a two-dimensional material in an existing two-dimensional field effect transistor can be oxidized and decomposed at high temperature. The device comprises a substrate (1), an insulation packaging protection bottom layer (2), a two-dimensional material film layer (3), an insulation packaging protection top layer (6) and a gate electrode (7) from bottom to top, a source electrode (4) and a drain electrode (5) are arranged at the two ends of the film layer (3), and the packaging protection bottom layer and the packaging protection top layer both adopt any one or combination of more of aluminum nitride, hexagonal boron nitride or silicon nitride. Oxygen molecules in the air are prevented from diffusing to the two-dimensional material film layer for reaction at high temperature, so that the two-dimensional material film layer plays a role in high-temperature protection; the two-dimensional material film layer is made of molybdenum disulfide or tungsten disulfide or tungsten diselenide. The high temperature resistance of the two-dimensional field effect transistor is improved, oxygenolysis of the two-dimensional material at high temperature is avoided, and the two-dimensional field effect transistor can be used for aerospace, deep well drilling or other high-temperature environments.

The invention relates to the technical field of in-vitro diagnostic kits, in particular to hollow porous monodisperse carboxyl polystyrene microspheres, a preparation method and application of the hollow porous monodisperse carboxyl polystyrene microspheres in a kit for quantitatively detecting MxA. The preparation method of the microspheres comprises the steps that firstly, hydrophilic polystyrene microspheres are prepared to serve as stable particles; then fully mixing the Pickering particles with a first oil phase to form Pickering stable particles; then a surfactant and a second oil phase are added, the mixed system is stirred at a high speed, and the second oil phase permeates into the surfaces or pores of Pickering stable particles through interface interaction and molecular diffusion; under the action of an initiator, the polymeric monomers are subjected to a polymerization reaction, the low-boiling-point organic solvent is evaporated out along with temperature rise, and a polymer with a core part of a hollow structure and a shell layer of a porous structure is formed; and adding a carboxyl-containing functional monomer to form a hydrophilic polymer chain on the surface of the polymer, thereby finally obtaining the hollow porous monodisperse carboxyl polystyrene microspheres.

The invention belongs to the technical field of materials, and particularly relates to a CuMn bimetallic nano-enzyme, a preparation method of portable hydrogel of the CuMn bimetallic nano-enzyme and application of the portable hydrogel in ascorbic acid detection. A preparation method of the portable hydrogel ball comprises the following steps: preparing a CuMn bimetallic nano-enzyme into a turbid liquid, ultrasonically dispersing sodium alginate into the CuMn bimetallic nano-enzyme turbid liquid, sucking sol by using a dropper, putting the sol into a tube cover of a plastic centrifugal tube, dropwise adding a calcium chloride solution, and continuously shaking to form the hydrogel ball. The CuMn bimetallic nano-enzyme material disclosed by the invention has rich active sites and a relatively large specific surface area, and the material has a relatively low detection limit on ascorbic acid detection. The hydrogel can immobilize the enzyme and can improve the catalytic activity and stability of the enzyme. The hydrogel has porosity and can promote molecular diffusion, and the hydrogel is very perfect as a substrate due to optical clarity. And the color change of the device can be combined with a smart phone to carry out on-site portable visual detection.

The invention discloses a two-dimensional organic transverse heterogeneous crystal and a preparation method and application thereof.According to the preparation method, a step-by-step micro-spacing air sublimation method is adopted, the growth temperature of a secondary crystal is precisely regulated, effective control over the molecular diffusion and deposition process is achieved, and the yield of the two-dimensional organic transverse heterogeneous crystal is improved. And the two-dimensional organic transverse heterogeneous crystal with the adjustable epitaxial layer thickness can be simply and conveniently prepared. According to the invention, unique optical characteristics of the two single-component crystals are fully utilized, and optical signal emission of different wavebands can be realized at different polarization angles. By means of the characteristic, the wide application potential is achieved in the fields of optical sensing, optical communication and the like, and the requirement for diversity of optical signal wavebands can be met.

The invention provides a molecular sieve catalyst and a preparation method and application thereof, and belongs to the technical field of molecular sieve preparation. The preparation method of the molecular sieve catalyst provided by the invention does not use a template agent, and comprises the following steps: mixing an aluminum source, a silicon source, a molybdenum-containing active component and a modified molecular sieve seed crystal, and carrying out hydrothermal crystallization and roasting to obtain the molecular sieve catalyst, the modified molecular sieve seed crystal being an acid modified molecular sieve seed crystal or an alkali modified molecular sieve seed crystal. In the preparation process, a template agent is not used, framework silicon species of a molecular sieve seed crystal are removed through alkali modification, or framework aluminum species of the molecular sieve are removed through acid modification, and a mesoporous structure can be formed through modification treatment, so that an original microporous molecular sieve is changed into a microporous-mesoporous hierarchical pore structure, molecular diffusion is facilitated, and the molecular sieve has a good application prospect. The catalyst has good carbon deposition resistance and catalytic reaction activity; meanwhile, the good crystallinity is kept, and the catalytic performance and the reaction stability of the methane oxygen-free aromatization reaction are further improved.

An apparatus includes a porous substrate and a multi-layer membrane. The porous substrate has a pore structure configured to allow diffusion of hydrogen molecules through the porous substrate. The multi-layer membrane is configured to, in response to contacting a hydrogen molecule present in the gas stream, split the hydrogen molecule into at least one of hydrogen atoms or protons. The multi-layer membrane is configured to allow passage of the hydrogen atoms or protons through the multi-layer membrane while blocking passage of compounds that may be present in the gas stream that are larger than hydrogen molecules. The hydrogen atoms or protons, after passing through the multi-layer membrane, combine to reform the hydrogen molecule. The multi-layer membrane includes a first metallic layer, an intermediate layer, and a second metallic layer.

The invention discloses a gas-gas diffusion concentration distribution calculation method considering gravity influence, and relates to the field of oil-gas field development, the method introduces a gravity drift velocity item generated by density difference into a traditional diffusion equation to realize unified characterization of molecular diffusion and gravity differentiation, and the method is suitable for gas-gas diffusion concentration distribution calculation. A dynamic mass transfer model suitable for multi-temperature-pressure and multi-component conditions is constructed and used for calculating concentration distribution and corresponding dynamic diffusion coefficients of injected gas and formation gas in the vertical diffusion process, and a calculation basis with better consistency is provided for prediction of the migration front edge and the distribution pattern of the injected gas, gas injection parameter optimization and gas channeling risk assessment. The method has the applicable value of improving the recovery ratio of the gas reservoir and the operation safety of the gas storage.

The utility model discloses a continuous high-efficiency crystallizer device based on ultrasonic enhanced mass transfer, which belongs to the technical field of crystallization, and adopts the technical scheme that the continuous high-efficiency crystallizer device comprises a crystallization component, the surface of the crystallization component is fixedly sleeved with a temperature control component, and the temperature control component comprises a jacket layer. The ultrasonic transducer can directionally emit ultrasonic waves to a solution in the crystallization reaction tank, and the cavitation effect and mechanical vibration generated by the ultrasonic waves can effectively break a solution mass transfer boundary layer, accelerate solute molecule diffusion, promote crystal nucleus formation and growth and greatly improve the crystallization efficiency. The temperature control assembly can achieve rapid heating and cooling of the crystallization reaction tank, meanwhile, the temperature in the crystallization reaction tank can be accurately controlled in cooperation with real-time monitoring of the temperature sensor, and therefore the strict requirements of different crystallization technologies for the temperature are met, and crystal quality reduction caused by temperature fluctuation is avoided.

The application discloses a double-material sliding block mold, and relates to the technical field of molds, which comprises a lower mold, an upper mold, a sliding block mechanism, a pouring pipe, a control mechanism, a mounting rod and a detection mechanism, the top of the lower mold is provided with the upper mold, the sliding block mechanism is slidably connected in the upper mold, the pouring pipe is fixedly connected to the front and rear ends of the top of the upper mold, the left end of the pouring pipe is fixedly connected with a pressure sensor, a temperature sensor and a flow sensor, and the control mechanism is fixedly connected to the lower outer wall of the pouring pipe, the sliding block mechanism is arranged, the first knocking block is driven by the second knocking block to knock the bottom of the sliding block body, micro-vibration is applied to the double-material joint surface, the vibration is matched with the molten state of the material, the molecular diffusion is improved, and the melt wettability of the double-material interface is improved, the compensation mechanism is arranged, the gap is compensated by the memory alloy, the mold closing precision is improved, and the melt leakage and air gap formation are prevented.

The invention discloses a bottom gas material and preparation and application thereof, and relates to the field of gas storage. The bottom gas material comprises a gas-repellent nano material, a surfactant and carbon dioxide. The bottom gas material has the beneficial effects of density regulation and improvement, remarkable diffusion inhibition, excellent dynamic adaptability and the like, and can solve the problems of easiness in molecular diffusion, low density gradient, poor dynamic stability and the like of an existing bottom gas material of a gas storage.

A device includes a porous substrate and a multilayer film. The porous substrate has a pore structure configured to allow hydrogen molecules to diffuse through the porous substrate. The multilayer film is configured to split hydrogen molecules into at least one of hydrogen atoms or protons in response to contacting the hydrogen molecules in the gas stream. The multilayer film is configured to allow passage of hydrogen atoms or protons through the multilayer film while blocking passage of larger compounds than hydrogen molecules that may be present in the gas stream. The hydrogen atoms or protons bind after passing through the multilayer film to reform hydrogen molecules. The multilayer film includes a first metal layer, an intermediate layer, and a second metal layer.

The integrated microfluidic detection chip comprises a liquid conveying channel, the upper end and the lower end of the liquid conveying channel are each provided with an inlet, the center position of the side end of the liquid conveying channel is communicated with a mixing channel, the other end of the mixing channel is communicated with a flow velocity difference channel, and the flow velocity difference channel is communicated with a flow velocity sensor. An electrode detection disc is arranged on the side face of the flow velocity difference channel in a communicating mode, and a circular barrier is fixedly arranged in the electrode detection disc. Compared with a traditional detection chip, the integrated microfluidic detection chip based on dual-channel flow velocity difference vortex enhancement has the following remarkable advantages: a breakthrough in mass transfer limit is achieved: through multiple physical coupling of dual-channel flow velocity difference, incident angle optimization and a circular barrier, substance transmission is converted from single molecule diffusion to active vortex driving; the bottleneck that mass transfer of a microfluidic system is limited is solved, and in-situ dynamic refreshing of a detection interface is realized by an automatically generated discrete sample injection mode.

The application discloses a high-temperature heat-stable two-dimensional field effect transistor and a preparation method, and mainly solves the problem that two-dimensional materials in the two-dimensional field effect transistor are oxidized and decomposed at high temperature. The two-dimensional field effect transistor comprises, from bottom to top, a substrate (1), an insulating encapsulation protection bottom layer (2), a two-dimensional material thin film layer (3), an insulating encapsulation protection top layer (6), a gate electrode (7), source electrodes (4) and drain electrodes (5) at two ends of the thin film layer (3), and the encapsulation protection bottom layer and the encapsulation protection top layer are both made of any one or a plurality of combinations of aluminum nitride, hexagonal boron nitride or silicon nitride, so that oxygen molecules in air are prevented from diffusing to the two-dimensional material thin film layer to react at high temperature, and the two-dimensional material thin film layer plays a role in high-temperature protection; the two-dimensional material thin film layer is made of molybdenum disulfide, tungsten disulfide or tungsten diselenide. The two-dimensional field effect transistor has improved high-temperature resistance, and the oxidation and decomposition of the two-dimensional material at high temperature are avoided, and the two-dimensional field effect transistor can be used in aerospace, deep well drilling or other high-temperature environments.

The invention relates to a system for detecting a cell surface PTK7 molecular diffusion coefficient based on a single molecule tracing technology and application thereof, and belongs to the technical field of cancer cell detection. The system comprises a single-molecule tracing fluorescence labeling probe, a single-molecule total internal reflection fluorescence microscope, an image acquisition module and an image processing module. The single-molecule tracing fluorescence labeling probe comprises a labeling unit targeting PTK7 and a single-molecule tracing fluorescence group. The probe has small interference on the structure and movement of PTK7 protein molecules, can realize excellent in-situ, interference-free, real-time and dynamic tracking of the movement of PTK7 protein in various tumor cells, and accurately displays the movement track of the target protein. The system can track and detect motion data of PTK7 proteins of normal cells and tumor cells, and further performs statistics, arrangement and analysis to obtain a dynamic motion rule of PTK7 molecules. The rule can be used as a novel biophysical index for evaluating the invasion and metastasis potential of tumor cells, and is used for early diagnosis and targeted therapy of tumor metastasis.

This invention discloses a method for distinguishing and quantifying the enhanced oil recovery (EOR) mechanism of CO2 huff and puff in unconventional oil reservoirs, relating to the field of oil and gas extraction technology. The method is based on nuclear magnetic resonance (NMR) experiments to determine the T2 spectrum and one-dimensional frequency coding of saturated oil cores. By analyzing the T2 spectrum and one-dimensional frequency coding of saturated oil cores, the CO2 huff and puff recovery rate and the effective CO2 reach distance are calculated. Based on the experimental data, a component model is established and calibrated to fit the experimental recovery rate and effective CO2 reach distance, thereby distinguishing and quantifying the EOR mechanism at different stages of CO2 huff and puff. This method can accurately classify the enhanced oil recovery mechanism during CO2 huff and puff into oil expansion, oil molecule diffusion, elastic energy release, and dissolved gas drive, effectively identifying the main controlling mechanism of CO2 huff and puff enhancement, providing a basis for optimizing field operations.

This invention discloses a sea urchin-shaped oxygen-rich vacancy O vac This paper describes a CuO@ZIF-8 core-shell structured photothermal catalyst, its preparation method, and its application, belonging to the fields of photocatalytic materials and artificial nitrogen fixation technology. The technical solution is as follows: the catalyst has a core-shell structure, with the core being urchin-shaped copper oxide (CuO) microspheres. These microspheres are assembled from radially arranged one-dimensional nanoneedles or nanospikes, and the surface of the core contains oxygen vacancies (O). vac The shell is an in-situ grown ultrathin zeolite imidazole ester framework material, ZIF-8, which possesses hydrophobic and molecular diffusion channel properties. This invention also constructs a matching biomimetic three-phase interface photothermal reaction system. Through the synergy of a hydrophilic substrate supplying water and a hydrophobic, permeable shell, it achieves a balance between gas diffusion and proton supply, reducing the submersion of active sites by liquid water and the occurrence of side reactions. This invention has significant advantages such as high photothermal conversion efficiency, mild preparation conditions, and high gas-liquid interface mass transfer efficiency.

This invention discloses a method for calculating gas-gas diffusion concentration distribution considering the influence of gravity, relating to the field of oil and gas field development. This method introduces a gravity drift velocity term generated by density difference into the traditional diffusion equation, realizing a unified characterization of molecular diffusion and gravity differentiation. It constructs a dynamic mass transfer model applicable to multi-temperature, multi-pressure, and multi-component conditions, which is used to calculate the concentration distribution and corresponding dynamic diffusion coefficient of injected gas and formation gas during the vertical diffusion process. This provides a more consistent calculation basis for predicting the migration front and distribution pattern of injected gas, optimizing gas injection parameters, and assessing gas channeling risk. It has applicable value for improving the recovery rate and the operational safety of gas storage facilities.

The invention discloses a method for distinguishing and quantifying an unconventional oil reservoir CO2 huff and puff recovery ratio improving mechanism, and relates to the technical field of petroleum and natural gas extraction. According to the method, a saturated oil core T2 spectrum and a one-dimensional frequency code are measured on the basis of a nuclear magnetic resonance (NMR) experiment, and the CO2 huff and puff recovery ratio and the CO2 effective action distance are calculated by analyzing the saturated oil core T2 spectrum and the one-dimensional frequency code; a component model is established and calibrated based on experimental data so as to fit the recovery ratio and the CO2 effective action distance in the experiment, and then EOR mechanisms of different CO2 huff and puff stages are distinguished and quantified. According to the method, the yield increasing mechanism in the CO2 huff and puff process can be accurately divided into oil expansion, oil molecule diffusion, elastic energy release and dissolved gas drive, the main control mechanism of CO2 huff and puff yield increasing can be effectively judged, and a basis is provided for optimization of field operation.

This utility model discloses a dehumidification device, comprising: a processing air duct, on which N stages of dehumidification rotors are sequentially arranged; the thickness of each dehumidification rotor is m, where M = m·N, N is a natural number greater than or equal to 2, and M is the target total thickness of the rotor; the final stage dehumidification rotor is a three-zone dehumidification rotor, and the ratio of the central angles of the regeneration zone, pre-cooling zone, and dehumidification zone of the three-zone dehumidification rotor is [1:1:3, 1:1:10]. This utility model's dehumidification device, by setting graded thin dehumidification rotors, breaks down traditional thick rotors into multi-stage thin dehumidification rotors (target total thickness of the rotors). The thin dehumidification rotors shorten the diffusion path of water molecules, allowing heat to penetrate the material layer more easily during regeneration, thus solving the problem of incomplete regeneration caused by excessively thick single rotors.

The invention relates to a deoxyribozyme binding arm, a kit, a biosensor and a nucleic acid detection method. The deoxyribozyme binding arm is of an annular structure and comprises a catalytic core A sequence of deoxyribozyme, a monomer amplicon recognition region, a sequence of a fragment containing a detection probe and a deoxyribozyme substrate recognition region; wherein the catalytic core part sequence of the deoxyribozyme comprises a part of sequence in any one of 8-17 type deoxyribozyme, E6 type deoxyribozyme or 10-23 type deoxyribozyme. The invention provides a deoxyribozyme binding arm and a multifunctional DNA nano-machine obtained by combining the deoxyribozyme binding arms, which integrate cutting enhanced rolling circle amplification, self-cutting DNAzyme and rolling circle amplification technologies, construct a self-cascade amplification nano-machine, and can perform molecular signal amplification on the existence of a formulated sequence. The system exhibits an increase in cascade reaction efficiency due to the minimization of the number of independent molecular diffusion / collision events.

The present application belongs to the field of gas sensing technology, and relates to a hydrogen sensor, and provides a humidity gain film of a molybdenum trioxide hydrogen sensor, which is used for solving the problems of slow response time and sensitivity decline of the existing hydrogen sensor caused by the influence of environmental humidity, and is jointly formed with a palladium-based hydrogen-sensitive film and a substrate to form the hydrogen sensor. Through the design of a thermal evaporation process, a molybdenum trioxide film with a thickness of 2-10 nm and a non-continuous nano-island structure on the surface is successfully deposited on the surface of the palladium-based hydrogen-sensitive film to serve as the humidity gain film. Through the unique reverse hydrogen release effect of the molybdenum trioxide film in a humidity environment, hydrogen atoms are accelerated to contact the active sites on the surface of the palladium film, and the influence of water molecules on the response speed of the palladium-based hydrogen sensor is weakened, that is, while allowing hydrogen molecules to diffuse through to the surface of the palladium-based hydrogen-sensitive film, the diffusion of water molecules is inhibited on the surface of the humidity gain film, and finally the target of rapid detection of hydrogen leakage in a humidity environment is achieved.