31 results about "Fluorescent particle" patented technology

The purpose of one aspect of the present invention is to provide fluorescent particles having excellent dispersibility. One aspect of the present invention relates to a fluorescent particle (100) having: a core particle (10A) with a first charge, the first charge being a positive charge or a negative charge; at least one polymer layer (12) and at least one fluorescent layer (11A, 11B) on the core particle, the polymer layer containing a polymer and carrying a second charge, the second charge being a positive charge or a negative charge; and a fluorescent layer containing metal nanoclusters (13) having fluorescent properties and carrying a third charge, the sign of which is opposite to that of the second charge.

The invention discloses a preparation method of traceable polyester staple fibers, which comprises the following steps: mixing a tracing raw material and a renewable synthetic fiber raw material, and carrying out melt spinning to obtain the traceable regenerated polyester staple fibers, the tracing raw material comprising at least two of cobalt Prussian blue analogues, germanate fluorescent materials and metal oxides. The invention also provides a traceable polyester staple fiber product prepared by the preparation method. According to the method, two color changes under thermal stimulation and solvent stimulation of primary-color polyester fibers can be achieved, meanwhile, the tracing germanate fluorescent particles and the metal oxide tracing particles are added to make up for the defect that color changes are difficult to recognize after the fibers are dyed, and meanwhile the tracing means is complicated, so that the fibers are difficult to counterfeit.

The application provides a fluorescent structural color anti-counterfeiting material and a preparation method thereof, and the preparation method comprises the following steps: preparing composite fluorescent particles of mesoporous silica microsphere loaded halogen perovskite fluorescent particles CsPbX3, wherein X is Br, Cl or I; mixing the composite fluorescent particles with monodisperse silica nanoparticles, resin, a solvent, an initiator and an additive to obtain a mixture, wherein the volume percentage of each component in the mixture is as follows: 25-65% of the nanoparticles, 35-75% of the resin, 0.01-10% of the initiator, and 5-90% of the solvent, and the mass of the composite fluorescent particles is 0.01-3% of the mass of the silica nanoparticles; performing rotary evaporation on the mixture under vacuum to obtain concentrated paint, and after photocuring or thermal curing, the anti-counterfeiting material is obtained. The anti-counterfeiting material of the technical scheme has the dual anti-counterfeiting effects of structural color anti-counterfeiting under natural light and fluorescent anti-counterfeiting under ultraviolet excitation.

The application provides a kind of dual-mode acoustic contrast agent with targeting and its preparation method and application, belong to the technical field of ultrasound contrast agent preparation. By compounding ultrasound contrast agent and fluorescent particles, a dual-mode acoustic contrast agent including ultrasound contrast agent and fluorescent probe containing DBCO structure is formed. The dual-mode acoustic contrast agent has targeting, and the DBCO group on the surface of the fluorescent probe can react with Ac4ManNAz to form an azide group enriched in tumor tissue, thereby realizing significant targeted fluorescence imaging of tumors, which is beneficial to early detection of tumors. The dual-mode acoustic contrast agent has both ultrasound imaging and targeted fluorescence imaging functions, with high imaging sensitivity and strong specificity, and has good application prospect.

The invention relates to the technical field of anti-corrosion coatings, in particular to an anti-corrosion early warning coating, a preparation method and application of the anti-corrosion early warning coating to environment monitoring equipment. The corrosion-resistant early-warning coating comprises an inner-layer coating and an outer-layer coating, wherein the outer-layer coating is prepared from the following components: a water-based fluorocarbon emulsion, a reinforcing agent, a polyether siloxane flatting agent and water; the inner-layer coating is prepared from the following components: waterborne epoxy emulsion, fluorescent particles, a waterborne amine curing agent, a polyether siloxane flatting agent and water. According to the double-layer structure coating prepared through the technical scheme, through the synergistic effect of the innovative reinforcing agent and the fluorescent particles, the excellent acid resistance is achieved, and the adhesive force can reach 26.5 MPa to the maximum; meanwhile, whether the surface protection state of the environment monitoring equipment is intact or not can be studied and judged immediately.

This invention discloses an automated monitoring and detection cascade control system for bioaerosols, comprising a cascaded monitoring and detection unit and an automatic control unit. The cascaded monitoring and detection unit includes: a first-level monitoring module, a bioaerosol monitor based on laser-induced fluorescence technology (aerosol fluorescent particle monitor); a second-level monitoring module, a bioaerosol live-cell monitor based on ATP fluorescence detection technology (aerosol live-cell ATP monitor); and a third-level detection module, a bioaerosol nucleic acid detector based on microfluidic PCR technology (an integrated bioaerosol detection and nucleic acid detection system). The automatic control unit uses high and low level switching signals to achieve sequential instantaneous triggering of the three levels of equipment, completing automated hierarchical monitoring and early warning of "broad-spectrum monitoring → biological confirmation → specific detection". This invention solves the problem in existing bioaerosol monitoring technologies that cannot simultaneously achieve broad-spectrum, real-time, accurate, and automated monitoring.

This disclosure provides a method for detecting an analyte in a sample, wherein the sample is introduced into an analytical chamber along with emulsion droplets or gel beads. In another aspect, this disclosure provides designs for formulating emulsion droplets or gel beads such that they can be used for the large-scale parallel detection of analytes. Formulations containing specific combinations of fluorescent particles allow for the optical determination of the identity of each fluorescent particle. These combinations are based on the particle fluorescence emission wavelength, fluorescence excitation wavelength, and particle count.

The utility model discloses a wavelength conversion assembly and lighting equipment. The wavelength conversion assembly comprises a supporting piece, a first wavelength conversion layer and a second wavelength conversion layer. Wherein the first wavelength conversion layer comprises a bearing part and a protruding part which are connected with each other; the bearing part is arranged on the supporting piece, and the side, away from the supporting piece, of the bearing part is provided with a first area and a second area, the protruding part is located in the first area and protrudes relative to the bearing part. The second wavelength conversion layer is wound on the periphery of the protruding part and covers the second area; wherein the second wavelength conversion layer comprises red fluorescent particles. The second wavelength conversion layer is doped with the red fluorescent particles, so that the specified laser can be converted into red fluorescence under the excitation of the red fluorescent particles. When the wavelength conversion assembly is configured in the lighting equipment, the lighting light generated by the lighting equipment can be mixed with the red light component, so that the color rendering index of the lighting light is improved, and the lighting equipment can meet the application scene with the high color rendering index.

The application discloses a fluorescent particle induced ultra-transmittance radiation refrigeration film and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing DCPDA monomers, graphene quantum dot dispersion liquid and an ultraviolet curing agent to obtain a mixed solution; concentrating the mixed solution to obtain a casting solution; coating the casting solution on the surface of a substrate to obtain a wet film; and curing the wet film to obtain the fluorescent particle induced ultra-transmittance radiation refrigeration film. By introducing the fluorescent particles into a polymer matrix and adding the ultraviolet curing agent, the fluorescent particle induced ultra-transmittance radiation refrigeration film is formed, the high transmittance of sunlight and the high infrared emissivity are realized, the radiation refrigeration performance of the fluorescent particle induced ultra-transmittance radiation refrigeration film is excellent, and the fluorescent particle induced ultra-transmittance radiation refrigeration film is suitable for building energy saving, photovoltaic cell cooling and cold chain transportation and the like. The preparation process is simple and suitable for large-scale application.

The present application is directed towards a method of tracking fluorescence in animals using fluorescent particles.

Fluorescent core-shell particles comprising a core, a first shell disposed on a surface of the core, and a second shell disposed on a surface of the first shell, wherein the core comprises a first polymer selected from a group consisting of a poly(alkyl acrylate), a poly(alkyl methacrylate), and copolymers thereof, the first shell comprises a first polyamine and a second polymer selected from a group consisting of a poly(alkyl acrylate), a poly(alkyl methacrylate), and copolymers thereof, and the second shell comprises a second polyamine and a plurality of carbon dots, wherein at least a portion of the first polyamine is grafted to the second polymer; methods of use and preparation thereof.

The purpose of the present invention is to provide a method for simultaneously detecting a variety of target biomolecules in one implementation using temperature-responsive fluorescent particles. The problem is solved by providing a method for detecting or quantifying biomolecules contained in a biological sample, comprising the following steps (1)-(3): (1) a step in which magnetic particles to which a biomolecule recognition element for capturing is bound, the biological sample, and temperature-responsive fluorescent probe particles are brought into contact with a magnetic substrate; (2) heating the magnetic substrate; and (3) a step for measuring fluorescence emission.

The invention discloses a particle printing method, system and device based on fluorescent field and bright field time sequence imaging, and the method comprises the steps: monitoring a micro-fluidic chip sorting region under the condition of continuous illumination of a multi-color fluorescent field, and collecting a fluorescent image of the micro-fluidic chip sorting region in real time; when the target fluorescent particles are recognized in the fluorescent image, bright field illumination is automatically triggered, and a bright field image is collected; carrying out fusion analysis processing on the fluorescence image and the bright field image, and extracting multi-dimensional feature parameters; judging whether the multi-dimensional characteristic parameters meet printing conditions or not according to a preset multi-modal judgment rule; when the multi-dimensional characteristic parameters meet printing conditions, a printing instruction is sent; and in response to the printing instruction, controlling the pressure and motion control unit to drive the printing channel of the micro-fluidic chip to print the target fluorescent particles to the specified hole site of the microwell plate. According to the particle printing technology combining the advantages of fluorescence imaging and bright field imaging, comprehensive feature analysis and high-precision sorting of particles are achieved.

The objective is to provide a semiconductor light-emitting element with reduced ripple in FFP (Flexible Printed Fluorescent Particle). The semiconductor light-emitting element includes a GaN substrate, a first nitride semiconductor portion disposed on the substrate and containing n-type impurities, a second nitride semiconductor portion disposed on the first nitride semiconductor portion and containing n-type impurities, and a third nitride semiconductor portion disposed on the second nitride semiconductor portion and containing n-type impurities. The concentration of n-type impurities in the first nitride semiconductor portion is greater than that in the third nitride semiconductor portion, and the concentration of n-type impurities in the second nitride semiconductor portion is greater than that in the third nitride semiconductor portion. The Al composition ratio of the second nitride semiconductor portion is greater than that of the first nitride semiconductor portion, and the Al composition ratio of the third nitride semiconductor portion is greater than that of the first nitride semiconductor portion.

The application discloses an outer pipeline cleaning platform, which comprises a case, a spray head, a fluorescent lamp, a cleaning mechanism, a driving mechanism and a camera. The spray head is used for spraying fluorescent particles onto the outer wall of a pipeline to be cleaned. The fluorescent lamp is used for irradiating the fluorescent particles. The cleaning mechanism is provided with a pipe clamping area for the pipeline to be cleaned to pass through. A plurality of brushes are arranged around the inner circumferential wall of the pipe clamping area. The plurality of brushes are movable structures that can move towards and away from the center of the pipe clamping area. The driving mechanism is used for driving the cleaning mechanism to move back and forth on a straight guide rail. The camera is used for shooting the fluorescent particles on the outer wall of the pipeline to be cleaned. When the amount of the fluorescent particles exceeds a preset value, the outer pipeline cleaning platform is used for controlling the plurality of brushes to move towards the center of the pipe clamping hole. Therefore, the scheme can adjust the extrusion length and the feeding distance according to the efficiency comparison feedback before and after cleaning, can carry and adapt to pipelines with different shapes, and can adjust the cleaning strategy in real time, so that the cleaning efficiency is quantified and improved.

The invention discloses an active isolation type reservoir depletion type development microfluidic simulation device and a recovery ratio quantitative calculation method, the device comprises a chip integrated with an active isolation micro valve and a double-branch outlet system, and the chip and the double-branch outlet system are used for establishing a physical isolation boundary and controlling rollback pressure reduction; the method comprises the following steps: selecting oil-soluble fluorescent particles, compounding single-phase gas-containing fluorescent crude oil according to a mine field production gas-oil ratio, closing a micro valve after a model is saturated so as to construct a constant-volume closed system, blocking a dead volume of a pipeline, simulating exhaustion by utilizing high-pressure pump rollback, and accurately calculating the recovery ratio based on a linear response relationship between a fluorescence intensity integral value and oil saturation. According to the invention, the interference of fluid backflow in a dead volume on fluid flow characteristics in a microfluidic model is eliminated, the problem of inaccurate measurement of the saturation degree of crude oil is overcome, and high-precision simulation of depletion type development under a real stratum condition is realized.

The present invention relates to a fluorescent core-shell particle comprising a core, a first shell disposed on a surface of the core and a second shell disposed on a surface of the first shell wherein the core comprises a first polymer, the first polymer is selected from the group consisting of poly (alkyl acrylate), poly (alkyl methacrylate), and copolymers thereof; the first shell comprises a first polyamine and a second polymer selected from the group consisting of poly (alkyl acrylate), poly (alkyl methacrylate), and copolymers thereof; and the second shell comprises a second polyamine and a plurality of carbon dots, wherein at least a portion of the first polyamine is grafted to the second polymer.

The invention provides a micro-pad high-precision positioning system and method based on fluorescence enhancement and polarization modulation, and belongs to the field of microelectronic packaging. The problems that in an existing micro-pad positioning technology, reflection interference of a metal pad is large, dispersion stability of a fluorescent material is poor, and a fluorescence emission spectrum is narrow are solved. The system comprises a die bonding arm and a bonding pad platform, the die bonding arm is installed beside the bonding pad platform, a substrate is placed on the bonding pad platform, micro bonding pads are arranged on the substrate, the micro bonding pads are coated with fluorescent soldering paste, the fluorescent soldering paste is formed by adding nano fluorescent particles into the soldering paste, and the surfaces of the nano fluorescent particles are grafted with a silane coupling agent to form a core-shell structure; the ultraviolet light source module is used for exciting fluorescence; the multispectral vision system is used for collecting fluorescence images; the sub-pixel positioning algorithm module is used for obtaining a central point coordinate of the micro bonding pad; the motion compensation controller is used for controlling the die bonding arm to carry out motion compensation according to the central point coordinate of the micro bonding pad; the method and the device are applied to positioning of the micro bonding pad in microelectronic packaging.

This application belongs to the field of light source technology and provides a red fluorescent ceramic, comprising: a fluoride ceramic matrix and first fluorescent particles, second fluorescent particles, and third fluorescent particles distributed within the fluoride ceramic matrix. The first fluorescent particle has a first emission peak, the second fluorescent particle has a second emission peak, and the third fluorescent particle has a third emission peak. The red fluorescent ceramic has an emission wavelength range of 600nm-680nm; wherein the first, second, and third emission peaks are all located within the emission wavelength range and do not overlap with each other. This red fluorescent ceramic can achieve red light emission with high color purity, has high fluorescence conversion efficiency and high thermal conductivity, improves the display color gamut, and is expected to further reduce the cost of laser display light sources. In addition, embodiments of this application also provide a method for preparing the red fluorescent ceramic and a light source device.

The invention discloses a multi-working-condition oil smoke purification device performance evaluation system and method, and relates to the technical field of particle measurement, and the method comprises the steps: obtaining an oil pan temperature and an air duct air speed, and generating a working condition state signal; starting an optical absorption spectrometer according to the working condition state signal to carry out full-wave-band scanning on the oil smoke airflow to obtain an absorption peak intensity value, and converting the absorption peak intensity value into an oil smoke concentration value through a standard concentration curve; matching fluorescent particles according to the lampblack concentration value, spraying the fluorescent particles to an inlet of the lampblack purification device, and judging whether the purification process is stably operated according to the concentration of the fluorescent particles at the inlet and outlet; during stable operation, a high-speed camera is started to record fluorescent particle tracks, and abnormal three-dimensional coordinate data are output; and constructing an outlet flow field distribution diagram based on the abnormal three-dimensional coordinate data, and outputting a device failure area. According to the invention, through cooperation of working condition state signal generation and abnormal three-dimensional coordinate data identification, dynamic modeling of performance evaluation of the multi-working-condition oil smoke purification device and accurate positioning of a failure area are realized.

The invention relates to the technical field of semiconductor light emitting, and discloses a light-emitting device which comprises a substrate, a light-emitting chip, a first fluorescent glue layer and a second fluorescent glue layer. The light-emitting chip is arranged on the substrate. The first fluorescent glue layer at least covers the upper surface of the light-emitting chip. And first fluorescent particles are arranged in the first fluorescent glue layer. The second fluorescent glue layer at least covers the upper surface of the first fluorescent glue layer, and second fluorescent particles are arranged in the second fluorescent glue layer. The heat conductivity of the first fluorescent glue layer is greater than that of the second fluorescent glue layer. The two fluorescent glue layers with different thermal conductivities are arranged, so that the problem of poor thermal conductivity of the fluorescent glue layers can be improved, the temperature of the fluorescent glue layers is reduced, and glue cracks are effectively avoided; meanwhile, the consistency of light emitting color and brightness is better, and the product quality and reliability are greatly improved; the product is easier to manufacture, and the yield is greatly improved.

The invention discloses an insulating, heat-dissipating and electrified visual three-dimensional hybrid material and a preparation method thereof, and belongs to the technical field of functional composite materials. The method comprises the following steps: preparing hexagonal boron nitride with carboxyl on the edge and a nanofiber crystal with amino on the surface; growing an aluminum oxide insulating layer on the surface of the sulfide fluorescent powder by using a gas phase reaction process, and carrying out surface modification by using a silane coupling agent containing an anhydride group; then, through chemical grafting reaction, a three-dimensional covalent hybrid network with hexagonal boron nitride as nodes, nanofiber crystals as a framework and modified fluorescent particles dispersed in the framework is constructed. The structure is beneficial to reducing the interface thermal resistance between the filler and a matrix and improving the agglomeration phenomenon of the functional filler; and the compact insulating layer on the surface is beneficial to improving the dielectric strength and weather resistance of the material. The prepared material has the functions of passive radiation heat dissipation and electric field induction luminescence in a polymer matrix, and is suitable for state monitoring of power equipment.

The invention provides a preparation method and application of supramolecular fluorescent particles based on cyclodextrin nano sponge, and the method comprises the following steps: step 1, dissolving the cyclodextrin nano sponge in deionized water, and fully dissolving to obtain a polycyclodextrin aqueous solution; step 2, dispersing and dissolving fluorescent molecules in a solvent, and performing ultrasonic dispersion to obtain a fluorescent molecule solution; step 3, dropwise adding the fluorescent molecule solution in the step 2 into the polycyclodextrin aqueous solution in the step 1, and continuously stirring for 20-48 hours to obtain a supramolecular fluorescent particle mixed solution; and step 4, continuously stirring the mixed solution to evaporate methanol in the solution, and then stirring at a constant speed. In order to remove free monomers, the mixed solution is centrifuged and sequentially filtered through filter membranes. And carrying out freeze drying to obtain the nano-scale particles of the cyclodextrin nano-sponge (SN-CD) and water-insoluble dye molecule compound. The invention provides an efficient and universal solution capable of inhibiting ACQ and FRET effects at the same time.

The utility model relates to power equipment technical field discloses the deformation early warning patch and deformation early warning mechanism. The utility model provides deformation early warning patch, through adopting photosensitive polymer matrix and the inductive layer that the fluorescent particle of setting is constituted, when the small deformation of support is produced because of wind load, material fatigue and the like, will make the internal structure of inductive layer change, thereby change its fluorescent characteristic. For example, in early warning stage, through detecting the fluorescent change of inductive layer, can make maintenance personnel take intervention measure before deformation reaches dangerous degree in the early stage of the microcosmic plastic deformation or fatigue damage that the support structure appears not visible to the naked eye, and in critical alarm stage, the development layer will show clear visible crack. That is, its inductive layer has very high sensitivity to deformation, can directly perceive and respond the deformation of component ontology, avoids the monitoring blind area and hysteresis caused by indirect measurement principle, system error and the like in the prior art.

The utility model discloses a wavelength conversion device and lighting equipment. The wavelength conversion device comprises a supporting piece and a wavelength conversion assembly. The supporting piece is provided with a first area and a second area which are adjacent, and the second area is arranged on the periphery of the first area in a surrounding mode. The wavelength conversion assembly comprises a first wavelength conversion layer and a second wavelength conversion layer, the first wavelength conversion layer covers the first area, and the second wavelength conversion layer covers the second area; wherein the second wavelength conversion layer comprises red fluorescent particles. The second wavelength conversion layer is doped with the red fluorescent particles, so that the specified laser can be converted into red fluorescence under the excitation of the red fluorescent particles. Therefore, when the wavelength conversion device is configured in the illumination equipment, the illumination light generated by the illumination equipment can be mixed with the red light component, so that the color rendering index of the illumination light is improved, and the illumination equipment can meet the application scene with the high color rendering index.

This invention discloses an IGF-1 detection kit and its application based on an upconversion fluorescent probe. The kit uses dilute hydrochloric acid solution, dilute sodium hydroxide solution, and PBS buffer for pretreatment of bovine colostrum samples to remove interfering substances such as fat, casein, and binding proteins, significantly enhancing the accuracy and specificity of IGF-1 detection. A 96-well plate is used as the detection container, enabling efficient and standardized detection of multiple samples simultaneously. Through background subtraction and noise reduction for fluorescent particle counting, the signal-to-noise ratio and specificity are significantly improved, achieving accurate single-particle identification and counting.

The invention discloses a turbine guider flow function and flow area detection test piece air tightness detection method. The method comprises the following steps: step 1, arranging a turbine guider flow function and flow area detection test piece, a laser emitter and a detection camera in a darkroom; 2, fluorescent particle mixed gas is supplied into an inner ring cold air cavity and an outer ring cold air cavity through a cold air inlet; 3, starting a laser transmitter, and adjusting laser beams to irradiate local matching surfaces of the turbine guider, the inlet measuring casing and the outlet measuring casing; 4, adjusting the angle of the detection camera, detecting whether fluorescent stripes continuously appear above local parts of the matching surfaces of the turbine guider, the inlet measurement casing and the outlet measurement casing, and if yes, judging that leakage exists in the local parts of the matching surfaces; and step 5, circumferentially and slowly moving the laser transmitter and the detection camera along the matching surfaces of the turbine guider, the inlet measurement casing and the outlet measurement casing, and completing air tightness detection of the whole matching surfaces of the turbine guider, the inlet measurement casing and the outlet measurement casing.

The application discloses an optical detection device and a control method thereof and a sample analyzer. In the optical detection device, a fluorescence excitation assembly is used to emit an excitation light beam, and a bright / dark field illumination assembly is used to emit an illumination light beam. A bearing table is located on an out-light path of the excitation light beam and the illumination light beam. An objective lens is located on the lower side of the bearing table, is used to perform microscopic imaging on fluorescent particles in a sample to be detected to form a first imaging light beam, is used to perform imaging on the sample to be detected under a bright field to form a second imaging light beam, and is used to perform imaging on the sample to be detected under a dark field to form a third imaging light beam. An imaging receiving assembly is located on an out-light path of the objective lens, and is used to receive the first imaging light beam, the second imaging light beam and the third imaging light beam. The optical detection device can not only perform fluorescence detection on a sample, but also perform bright / dark field detection on the sample. Moreover, the optical detection device has the advantages of simple and compact structure, low cost, clear imaging effect and improved accuracy of sample detection.