44 results about "Ion sensing" patented technology

A pre-ignition prevention system for a turbulent jet ignition (TJI) engine having dual spark plugs includes an ion sensing system and a controller configured to receive the ion sense signal from the ion sensing system, detect, using the ion sense signal, a misfire event where a firing of a first spark plug fails to completely combust a fuel / air pre-charge in a pre-chamber of a cylinder of the TJI engine, in response to detecting the misfire event, detect, using the ion sense signal, an exhaust stroke heat release event after a firing of the second spark plug indicative of a remaining portion of a primary fuel / air charge in the main chamber and, in response to detecting the exhaust stroke heat release event, adjust fueling for at least one subsequent combustion cycle to prevent pre-ignition of the remaining portion of the primary fuel / air charge in the main chamber.

The invention relates to the technical field of tobacco production, and discloses a tobacco nitrogen fertilizer application method based on ion sensing, and the method comprises the following steps: soil foundation determination; applying a base fertilizer; transplanting and fertilizing; field topdressing; fertilizing in a vigorous growth period; management after fertilization: the nitrogen content of the soil is measured again 7-10 days after each time of topdressing, the fertilization frequency and dosage are adjusted according to monitoring data, stable nitrogen supply of the tobacco is ensured, and tobacco reviving or nitrogen fertilizer waste caused by excessive fertilization is avoided. By monitoring nitrogen ions in soil in real time, application of the nitrogen fertilizer is accurately regulated and controlled, the utilization efficiency of the fertilizer is improved, and tobacco growth is optimized. The precise fertilization method based on the ion selective electrode technology aims at solving the problems that in traditional fertilization, the nitrogen fertilizer dosage is difficult to precisely control, waste is caused, and tobacco leaves turn green. By monitoring the soil nitrogen ion concentration in real time and adjusting the fertilization amount according to the growth stage, the nitrogen fertilizer utilization efficiency is improved, the environmental pollution is reduced, the tobacco growth environment is optimized, and the tobacco yield and quality are improved.

The present invention generally relates to a field of material science and chemistry. Specifically, the present invention relates to synthesis and characterization of lead-free hybrid organic-inorganic Perovskite compounds for metal ion sensing applications. More particularly, the present invention relates to lead-free low dimensional manganese (Mn)- and copper (Cu)- based hybrid organic-inorganic perovskites (HOIPs) for visual fluorometric Pb2+ ion detection. Further, the present invention relates to synthesis of lead-free low dimensional manganese (Mn)- and copper (Cu)-based hybrid organic-inorganic perovskites (HOIPs) via mechanochemical synthesis methodology.

The invention relates to a device and a method of a high-sensitivity suspension single-droplet sensor for monitoring PM2.5 pollution, belongs to the technical field of aerosol microdroplet spectrum trace analysis, and solves the problem that ppb-magnitude gas cannot be monitored in the prior art. The method comprises the following steps: pumping aerosol into a sample cell of a droplet suspension system in a single droplet form; introducing required reaction gas into the sample pool through an atmosphere control system; scattered light signals of the single liquid drops are respectively input into the dynamic signal processing system and the microdroplet imaging system; acquiring the characteristic peak displacement change of the metal ion sensing microdroplet; establishing a gas particle distribution Mie scattering inversion model based on micro-droplet dynamic response; inverting the radius of the liquid drop according to the stimulated Raman scattering / stimulated elastic scattering signal; according to the quantitative relationship of the reaction, calculating the generation of sulfate by the droplet suspension system (sensor); and judging which gas in the actual atmosphere is a main oxidation pathway for oxidizing sulfur dioxide to generate sulfate pollutants according to a calculation result.

The invention discloses a miniature multi-ion sensing system based on a non-gate array and a preparation method thereof, and belongs to the technical field of electrochemical sensing, and the miniature multi-ion sensing system comprises a multi-ion sensing unit and a molybdenum disulfide non-gate array; the multi-ion sensitive unit comprises a metal electrode array, an ion sensitive film array and a liquid storage tank, multiple ions are detected through the ion sensitive film array at the same time and converted into electric signals, and the electric signals are transmitted to the molybdenum disulfide non-gate array through the metal electrode array; the molybdenum disulfide NOT gate array comprises a plurality of molybdenum disulfide NOT gates, and each molybdenum disulfide NOT gate comprises a metal electrode layer, a molybdenum disulfide layer, a NOT gate input end and a NOT gate output end, so that two field effect transistors are formed, received electric signals are amplified, the Nernst limit is broken through a NOT gate structure, and tiny changes of ion concentration are accurately detected. The sensitivity is higher; molybdenum disulfide is used as a channel material of the NOT gate, so that the size and power consumption of the NOT gate are effectively reduced, the integration level of the system is improved, and the service life of the system is prolonged.

Aspects provide a device comprising: a substrate doped to form a first well; a first deep trench etched in the substrate; a dielectric in the first deep trench; a first conductor within the dielectric in the first deep trench and biased to create a first depletion region in the substrate proximate the first deep trench, wherein the substrate forms a bottom electrode of a first deep trench isolation varactor and the conductor in the first deep trench forms a top electrode of the first deep trench isolation varactor; a sense electrode operable to become electrically charged when interacting with an ionized fluid, wherein the sense electrode is operable to electrically charge the first deep trench isolation varactor; and a fluid property measurement circuit operable to determine a change in the capacitance of the first deep trench isolation varactor and output a fluid property signal.

The invention relates to the technical field of porous organic polymers, in particular to a nitrogen-doped anthracene-based porous organic polymer and a preparation method thereof.9, 10-dibromoanthracene serves as an initial monomer raw material, coupling is conducted through a Suzuki coupling reaction, and the novel nitrogen-doped anthracene-based porous organic polymer is designed and synthesized through Cichibabin; a unique framework of the porous polymer endows the porous polymer with relatively good electron donating ability, and the porous polymer has a large specific surface area and multiple active sites, and an extensible pi-pi conjugated network realizes selective recognition of transition metal ions, so that the problem that an existing porous polymer is insufficient in application in the field of heavy metal ion sensing is solved.

The invention provides a sensing device based on a stretchable metasurface and a heavy metal ion sensing method, and belongs to the technical field of optical sensing. The device comprises a flexible stretchable substrate and an optical metasurface arranged on the flexible stretchable substrate, a periodic nanostructure of the device can spontaneously suck liquid to be measured through the capillary effect, and meanwhile the metasurface period can be changed by stretching the substrate so as to tune the wavelength of an optical formant. The method comprises the following steps: applying strain to tune wavelength, introducing liquid to be measured to spontaneously fill, collecting spectrum and analyzing spectrum characteristics to determine the heavy metal ions. According to the invention, through integration of mechanical tuning and capillary sampling functions, the existing technical problems are solved, multi-dimensional detection based on wavelength selection and spectral line analysis is realized, and the device has the beneficial effects of high selectivity, high sensitivity, portability and capability of realizing multi-ion parallel detection.

The present invention discloses an AraC mutant for sensing submarine metal ion Cd(II), a submarine-detecting microbial sensor constructed therefrom, and applications thereof. The AraC mutant is AraCmt-Cd, whose amino acid sequence is as shown in SEQ ID NO.10, and the nucleotide sequence of its encoding gene is as shown in SEQ ID NO.9. The mutant AraCmt-Cd can specifically bind to the metal ion Cd(II) and be induced by it to activate the P BAD promoter, thereby driving the expression of the downstream electron transfer pigment protein (CymA), and realizing the output of electrochemical signals after sensing the metal Cd(II) ions. The submarine-detecting microbial sensor constructed by the present invention, which contains a metal ion sensing element and an electrical signal reporting element, can sense the metal ions released by submarines in water and cause changes in electrochemical signals, so that submarines can be detected in real time.

The application discloses a display panel and a display device. The display panel has a display area and a non-display area arranged at the periphery of the display area; the display panel comprises: an array substrate; a counter substrate arranged on one side of the array substrate; and a liquid crystal layer arranged between the array substrate and the counter substrate; wherein the non-display area of the display panel is provided with an ion dispersion structure, and the ion dispersion structure comprises: an ion sensing element for sensing the concentration of charged ions in the liquid crystal layer; a charge output element which is arranged in a spaced manner with the ion sensing element and is used for receiving a charge output by a control circuit, the charge having the same polarity as the charged ions in the liquid crystal layer; and a porous ion adsorption carrier which is arranged in a spaced manner with the ion sensing element and the charge output element and is used for adsorbing the charged ions in the liquid crystal layer. Through the above arrangement, the charged ions in the liquid crystal layer can be eliminated, and the problem that the charged ions in the liquid crystal layer of the display panel in the related art cause display residual image, the response speed of the display panel and the display stability to decrease can be solved.

Inductors and biased deep trench isolation (DTI) varactors may detect the type and concentration of ions in a fluid. An ion sensing device comprises: a deep trench isolation varactor in a substrate having a dielectric and a conductor and biased to create a depletion region in the substrate proximate the deep trench; a sense electrode operable to become electrically charged when interacting with an ionized fluid, wherein the sense electrode is operable to electrically charge the deep trench isolation varactor; an inductor proximate the deep trench isolation varactor and configured so that a change of a characteristic of the deep trench isolation varactor induces a change in the quality factor of the inductor; and a fluid property measurement circuit operable to determine a change in the quality factor of the inductor and output a fluid property signal.

The utility model discloses a combined type fluorine ion sensing device which comprises a laser beam emitting light source, a collimating lens is arranged on the side face of the laser beam emitting light source, and the emitting path of the laser beam emitting light source is arranged right opposite to the input end of the collimating lens, so that laser beams emitted by the laser beam emitting light source can enter the collimating lens smoothly and accurately. The end part of the collimating lens is connected with an evanescent wave optical fiber spherical sensor through a transmission optical fiber, and a shell of the transmission optical fiber is connected with composite detection test paper through a wire. According to the device, the functions of high fluorine ion selectivity, short detection time, high accuracy and low cost are realized.

Hydrocarbon enhanced ionophore-based ion-selective optodes (ISOs) and methods of their use are provided. The ISOs exhibit improved ultrasensitive ion sensing due to the addition of ultralow-polarity hydrocarbons to the sensing phase using specific ratios of sensing phase components. The ISOs can be operated under an exhaustive or non-exhaustive extraction response mode.

The application discloses a paper-based arsenic ion synthetic biosensor based on a cell-free system and application thereof, and comprises a cell-free arsenic ion sensing module and a semi-quantitative paper-based detection chip. The cell-free arsenic ion sensing module is composed of a synthetic arsenate reduction module, an arsenic ion specificity sensing module, a high-gain transcription amplification module and a visual reporting module connected in sequence. The synthetic arsenate reduction module converts pentavalent arsenic into trivalent arsenic; the arsenic ion specificity sensing module recognizes trivalent arsenic and removes transcription inhibition; the high-gain transcription amplification module amplifies the signal through ecf11 cascade; and the visual reporting module outputs a colorimetric or fluorescent signal. The application integrates an engineered promoter and an ecf11 cascade amplification system in a cell-free system, greatly improves sensitivity and dynamic range and keeps low leakage. The paper-based chip can present different pattern arrangements according to arsenic concentration and is easy to read. The application provides an environmentally friendly, portable and easy-to-read innovative method for monitoring arsenic pollution in drinking water.

Hydrocarbon enhanced ionophore-based ion-selective optodes (ISOs) and methods of their use are provided. The ISOs exhibit improved ultrasensitive ion sensing due to the addition of ultralow-polarity hydrocarbons to the sensing phase using specific ratios of sensing phase components. The ISOs can be operated under an exhaustive or non-exhaustive extraction response mode.

The present invention provides a multiple stimulus-responsive photochemical sensor and its preparation method and application, belonging to the field of multiple stimulus-responsive material technology. Under a protective atmosphere, the present invention performs a Suzuki coupling reaction on 2-bromo-1,1,2-triphenylethylene, 2-formyl-4-thiopheneboronic acid, a palladium catalyst, an alkaline compound and a solvent to obtain 4-(1,2,2-triphenylethylene)thiophene-2-carboxaldehyde; under a protective atmosphere, 4-(1,2,2-triphenylethylene)thiophene-2-carboxaldehyde, 2-amino-4,6-dimethylpyrimidine, tetrabutylammonium hydrogen sulfate and a solvent are mixed to perform a condensation reaction to obtain a multiple stimulus-responsive photochemical sensor. The present invention provides applications of the obtained compound in acid-base response, ion sensing, photochromism, safety ink and cell fluorescence imaging. The preparation method has simple steps, low cost, mild preparation conditions, is suitable for industrial production, and has great application prospects.

The invention discloses a wearable sensor based on optical signal transmission and a detection method, and relates to the technical field of electrochemical wearable sensors, and the wearable sensor comprises a microfluidic module used for collecting sweat; the ion sensing module is connected with the micro-fluidic module and is used for detecting related ion concentration in sweat and converting the ion concentration into an output potential signal; the related ions comprise potassium ions, sodium ions and hydrogen ions; the detection circuit module is connected with the ion sensing module and is used for converting the potential signal output by the ion sensing module into an irradiance signal of a light emitting diode; and the elastic coil module is connected with the detection circuit module and is used for supplying power to the detection circuit module. According to the irradiance signal output by the light emitting diode, the corresponding ion concentration is obtained through image processing, and the technical problems that in the prior art, a circuit system is complex, power consumption is high, and dependence on a chip and a battery exists in a traditional wearable sweat detection technology are solved.

This invention discloses an intelligent monitoring method and system for chloride ion content based on multi-source data correction, belonging to the field of intelligent chloride ion content monitoring technology. The method includes: acquiring chloride ion sensing data and electrolysis process parameters during copper foil electrolysis production to construct a basic monitoring data set; identifying stable operating intervals based on the basic monitoring data set and generating a micro-perturbation control sequence to be applied to the electrolysis process to create a perturbation state; extracting the time interval and preceding / following neighborhoods of the perturbation effect to construct a perturbation response data sequence; segmenting the perturbation response data sequence to extract the response change amplitude, change rate, and recovery characteristics to form a perturbation response feature set; performing consistency analysis based on the response characteristics to identify and correct abnormal response intervals, obtaining a correction sequence; performing continuity screening and fluctuation convergence processing on the correction sequence to output the target chloride ion content value. This invention achieves dynamic and accurate monitoring of chloride ion content.

In described examples, a biosensor device has a porous membrane with a test region that contains a test analyte. A sensor die has an ion sensing field effect transistor (ISFET) with an ion sensitive gate element located in an active sensor surface of the sensor die. The active sensor surface is in contact with the porous membrane test region. A controller is coupled to the ISFET and an interface module is coupled to the controller to provide a human readable test result.

The DNA hydrogel is prepared by adopting a hairpin structure of an H1 chain, a hairpin structure of an H2 chain and a trigger probe to perform a hybridization chain reaction, the DNA hydrogel is applied to zinc ion detection, specifically, a to-be-detected sample is added into the DNA hydrogel, after standing, liquid in the mixture is sucked by a capillary tube, and when the volume of the liquid in the capillary tube is obviously higher than that of the added to-be-detected sample, it is indicated that the to-be-detected sample contains zinc ions; the preparation method is simple, the detection method is visual, field operation is convenient, detection can be achieved without complex instruments, and the kit is low in cost, rapid, simple, convenient, economical, high in sensitivity and good in specificity; a powerful guarantee is provided for research and development of a heavy metal ion sensing technology.

The application provides an ion sensing slurry and a preparation method thereof, a textile ion sensor and a preparation method and application thereof, and relates to the technical field of sensors.The ion sensing slurry provided by the application comprises graphene, water-based polyurethane and silk fibroin; the mass of the silk fibroin is 5-25% of the total mass of the graphene and the water-based polyurethane; and the mass of the graphene is 5-15% of the total mass of the graphene and the water-based polyurethane.The ion sensing slurry provided by the application has the function of ion sensing, is printed onto the surface of a fabric, and the obtained textile ion sensor can effectively detect urine protein in urine, realizes the monitoring of human life and health, and has good mechanical strength and bending resistance.

The test piece for electrolyte analysis of the present invention includes a substrate (31) extending along one direction (X direction). On one main surface (31a) of the substrate (31), there are provided: a first ion sensing film (41i) disposed in a specific area on the end (31e) side in the X direction; and a first lead electrode (43) extending from the first ion sensing film (41i) toward the other end (31f) side. On the other main surface (31b) of the substrate (31), there are provided: a second ion sensing film (42i) disposed in a specific area on the end (31e) side; and a second lead electrode (44) extending from the second ion sensing film (42i) toward the other end (31f) side. The first ion sensing film (41i) and the second ion sensing film (42i) are respectively in contact with the electrolyte, generating a first potential corresponding to the concentration of the first ion species and a second potential corresponding to the concentration of the second ion species.

The invention discloses a calixarene derivative and a preparation method and application thereof, the structure of the calixarene derivative is as shown in formula I: R1 is CO2-NH4 < + >; r2 is any one of straight-chain alkyl, branched-chain alkyl, straight-chain alkyl containing double bonds and branched-chain alkyl containing double bonds. According to the invention, iodobalix [4] arene and an alkynyl-containing phenyl compound are connected through a Sonogashira coupling reaction to construct an extended aromatic macrocyclic skeleton, and then an ionic water-soluble structure is obtained through upper edge ester group hydrolysis. The calixarene derivative has the following innovative advantages that the depth and the volume of a cavity are remarkably increased, and large-volume guest molecules can be efficiently included; the extended cavity realizes effective inclusion of guest molecules through hydrophobic interaction and Van der Waals force; an upper edge carboxylate radical ion group specifically recognizes a cationic object through electrostatic interaction, so that the multi-site recognition function of enzyme is simulated; the water solubility is enhanced, and the method is suitable for the biological medicine fields of drug delivery, ion sensing and the like.

The application discloses a kind of monolithic three-dimensional integrated differential amplification circuit ion sensing system and preparation method thereof, belong to MEMS technical field, including differential amplification circuit and ion-sensitive field effect transistor, by setting molybdenum disulfide layer in differential amplification circuit, and ion-sensitive field effect transistor is set on molybdenum disulfide layer, through the two ion-sensitive membranes set on two gates synchronous work under differential amplification circuit, one ion-sensitive membrane senses ion signal in the liquid to be measured, another ion-sensitive membrane senses environmental noise, through ion-sensitive field effect transistor and differential amplification circuit, the difference of two end output signals is extracted and amplified, while retaining target ion response signal, environmental noise is inhibited, high-precision, high-sensitivity detection to target ion concentration is realized;And the whole ion sensing system only occupies the area of two FETs, reduces chip plane area, realizes the chip-level miniaturization and high integration of ion sensing system.

The invention discloses an intelligent electronic catheter and a preparation method thereof, and belongs to the technical field of in-vivo medical sensing. Comprising the following steps: preparing a silver / silver chloride reference electrode, a calcium ion sensing electrode, a potassium ion sensing electrode, a sodium ion sensing electrode, a bilirubin sensing electrode, a taurine sensing electrode and a hydrogen peroxide sensing electrode; performing hydrophilic treatment on the surface of the venous catheter, and attaching the prepared metal gel printing slurry; the metal gel printing slurry is subjected to 3D printing on the surface of the venous catheter; cutting the sensing electrodes and the reference electrodes, adhering the sensing electrodes and the reference electrodes to the tail end of the metal gel printing circuit, and heating to obtain the metal gel printing circuit; and packaging the metal gel printing circuit to obtain the electronic conduit. Compared with the prior art, the method has the advantages that metal gel is printed on the surface of the medical catheter, chemical signal sensors for various complications of parenteral nutrition are designed, and trend prediction is performed in combination with machine learning.

The invention discloses an ion sensing system of a monolithic three-dimensional integrated differential amplification circuit and a preparation method of the ion sensing system, and belongs to the technical field of MEMS, the ion sensing system comprises a differential amplification circuit and an ion sensitive field effect transistor, a molybdenum disulfide layer is arranged in the differential amplification circuit, and the ion sensitive field effect transistor is arranged on the molybdenum disulfide layer. Two ion sensitive films arranged on two grid electrodes synchronously work under a differential amplification circuit, one ion sensitive film senses ion signals in liquid to be detected, the other ion sensitive film senses environmental noise, and the difference value of output signals at the two ends is extracted and amplified through an ion sensitive field effect transistor and the differential amplification circuit. Environmental noise is suppressed while target ion response signals are reserved, and high-precision and high-sensitivity detection of target ion concentration is realized; and the whole ion sensing system only occupies the area of two FETs, so that the plane area of a chip is reduced, and chip-level miniaturization and high integration of the ion sensing system are realized.

Aspects provide a device comprising: a substrate doped to form a first well; a first deep trench etched in the substrate; a dielectric in the first deep trench; a first conductor within the dielectric in the first deep trench and biased to create a first depletion region in the substrate proximate the first deep trench, wherein the substrate forms a bottom electrode of a first deep trench isolation varactor and the conductor in the first deep trench forms a top electrode of the first deep trench isolation varactor; a sense electrode operable to become electrically charged when interacting with an ionized fluid, wherein the sense electrode is operable to electrically charge the first deep trench isolation varactor; and a fluid property measurement circuit operable to determine a change in the capacitance of the first deep trench isolation varactor and output a fluid property signal.

The present disclosure relates to integrated ion sensing devices and methods. An integrated ion-sensitive probe is provided. In examples, the ion-sensitive probe can include a semiconductor substrate and a first passive electrode attached to the semiconductor substrate. The first passive electrode can be configured to contact a solution and provide a first voltage that is a function of an ion concentration in the solution. In certain examples, a passive reference electrode can be collocated on the semiconductor substrate. In some examples, processing electronics can be integrated on the semiconductor substrate.

The present invention discloses a preparation method and multifunctional water treatment application of lignin colorful carbon nanodots, belonging to the field of biomass nanomaterials. The present invention uses lignin and 2,4-diaminobenzenesulfonic acid as precursors to obtain blue, green and red three fluorescent emission carbon nanodot solutions or powders through hydrothermal, extraction and other steps, realizing the colorful luminescence regulation of lignin carbon dots. The present invention also applies lignin colorful carbon nanodots to iron ion sensing of water bodies, and realizes intelligent visualization detection of composite hydrogels, and composites lignin colorful carbon nanodots with photocatalyst ZnIn2S4, effectively improving the separation efficiency of photogenerated electron-hole pairs, and successfully used for the degradation of antibiotic-contaminated water bodies. The present invention realizes the luster transformation of lignin, a byproduct of pulping and papermaking, improves the comprehensive utilization rate of lignin and is applied to the treatment of drug pollutants and metal ion monitoring of complex water bodies. The method is simple and feasible, which is conducive to the promotion of industrial lignin waste treatment system and its multifunctional and efficient water treatment application.

The DNA hydrogel is prepared by adopting a hairpin structure of an H1 chain, a hairpin structure of an H2 chain and a trigger probe to perform a hybridization chain reaction, the DNA hydrogel is applied to lead ion detection, specifically, a to-be-detected sample is added into the DNA hydrogel, after standing, liquid in the mixture is sucked by a capillary tube, and when the volume of the liquid in the capillary tube is obviously higher than that of the added to-be-detected sample, it is indicated that the to-be-detected sample contains lead ions; the preparation method is simple, the detection method is visual, field operation is convenient, detection can be achieved without complex instruments, and the kit is low in cost, rapid, simple, convenient, economical, high in sensitivity and good in specificity; a powerful guarantee is provided for research and development of a heavy metal ion sensing technology.