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50results about How to "Short fluorescence lifetime" patented technology
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Boron-containing organic light emission diode device and preparation method thereof
ActiveCN107507921AReduced singlet-triplet energy level differenceDelayed fluorescenceSolid-state devicesSemiconductor/solid-state device manufacturingElectron injectionTriplet state
Owner:JIANGSU SUNERA TECH CO LTD
Electroluminescence device based on boron-containing organic compound
ActiveCN110492006AImprove efficiencyExtend your lifeSolid-state devicesSemiconductor/solid-state device manufacturingOrganic light emitting deviceCharge carrier
The present invention relates to an electroluminescence device based on a boron-containing organic compound, wherein a main body material comprises a first organic compound and a second organic compound, the difference between a singlet state energy level and a triplet state energy level of the first organic compound is not greater than 0.2 eV, the singlet energy level of the second organic compound is greater than the singlet energy level of the first organic compound by more than 0.1 eV, and the triplet energy level of the second organic compound is greater than the triplet energy level of the first organic compound by more than 0.1 eV; the first organic compound and the second organic compound have the different carrier transport characteristics, wherein an object material is the boron-containing organic compound, the singlet energy level of the object material is lower than that of the first organic compound, and the triplet energy level of the object material is lower than that ofthe first organic compound. An organic light-emitting device prepared by the method has the characteristics of high efficiency and long service life.
Owner:JIANGSU SUNERA TECH CO LTD
Pr-Containing Scintillator Single Crystal, Method of Manufacturing the Same, Radiation Detector, and Inspection Apparatus
ActiveUS20080213151A1Promote growthLow melting pointPolycrystalline material growthBy pulling from meltX-raySingle crystal
The present invention provides an oxide-base scintillator single crystal having an extremely large energy of light emission, adoptable to X-ray CT and radioactive ray transmission inspection apparatus, and more specifically to provide a Pr-containing, garnet-type oxide single crystal, a Pr-containing perovskite-type oxide single crystal, and a Pr-containing silicate oxide single crystal allowing detection therefrom light emission supposedly ascribable to 5d-4f transition of Pr.
Owner:TOHOKU TECHNO ARCH CO LTD +1
Electroluminescent device based on exciplex system and matched with boron-containing organic compound
ActiveCN110492009AImprove stabilityReduce concentrationSolid-state devicesSemiconductor/solid-state device manufacturingSimple Organic CompoundsOrganic light emitting device
The invention relates to an electroluminescent device based on an exciplex system and matched with a boron-containing organic compound, wherein a subject material contains a first organic compound anda second organic compound, the difference between the HOMO energy level of the first organic compound and the HOMO energy level of the second organic compound is 0.2 eV or more, and the difference between between the LUMO energy level of the first organic compound and the LUMO energy level of the second organic compound is 0.2 eV or more. A mixture or an interface formed by the first organic compound and the second organic compound generates an exciplex under the excitation of the light or an electric field, the singlet energy level of the exciplex is higher than that of an object material, and the triplet energy level of the exciplex is higher than that of the object material. The first organic compound and the second organic compound have different carrier transport characteristics, andthe object material is the boron-containing organic compound. An organic light-emitting device prepared by the method has the characteristics of high efficiency and long service life.
Owner:JIANGSU SUNERA TECH CO LTD
Garnet-type crystal for scintillator and radiation detector using the same
ActiveUS20130306874A1High densityHigh degreeMaterial analysis by optical meansX/gamma/cosmic radiation measurmentScintillatorMaterials science
The garnet-type crystal for a scintillator of the present invention is represented by General Formula (1), (2), or (3),Gd3-x-yCexREyAl5-zGazO12  (1)wherein in Formula (1), 0.0001≦x≦0.15, 0≦y≦0.1, 2<z≦4.5, and RE represents at least one selected from Y, Yb, and Lu;Gd3-a-bCeaLubAl5-cGacO12  (2)wherein in Formula (2), 0.0001≦a≦0.15, 0.1<b≦3, and 2<c≦4.5;Gd3-p-qCerRE′qAl5-rGarO12  (3)wherein in Formula (3), 0.0001≦p≦0.15, 0.1<q≦3, 1<r≦4.5, and RE′ represents Y or Yb.
Owner:FURUKAWA COMPANY +1
Broad-band near-infrared emission luminescent substance and luminescent device containing the same
ActiveCN108913135APromote absorptionBroad near-infrared emissionSolid-state devicesSemiconductor/solid-state device manufacturingSingle substanceFluorescence
Belonging to the technical field of luminescent materials, the invention in particular relates to a broad-band near-infrared emission luminescent substance, in particular to a material capable of generating red light and near-infrared emission in a range of 700nm-1600nm under the excitation of ultraviolet, purple light, blue light and red light, and further discloses a preparation method of the material and a luminescent device containing the luminescent material. The broad-band near-infrared emission luminescent substance includes an inorganic compound with a molecular formula of AaDbMcEdOe:xCr. The luminescent substance has a strictly occupied ordered structure, and the material is a single substance, adopts Cr as the optical active center, can well absorb ultraviolet light, blue light and red light, and under the excitation of ultraviolet or purple light or blue light, can realize broad-band red light and near-infrared emission in the range of 700nm-1600nm, and has shorter fluorescence lifetime.
Owner:XIAMEN UNIV +1
Garnet-type crystal for scintillator and radiation detector using the same
ActiveUS8969812B2Short fluorescence lifetimeHigh densityX-ray/infra-red processesMaterial analysis by optical meansScintillatorMaterials science
The garnet-type crystal for a scintillator of the present invention is represented by General Formula (1), (2), or (3),Gd3-x-yCexREyAl5-zGazO12  (1)wherein in Formula (1), 0.0001≦x≦0.15, 0≦y≦0.1, 2<z≦4.5, and RE represents at least one selected from Y, Yb, and Lu;Gd3-a-bCeaLubAl5-cGacO12  (2)wherein in Formula (2), 0.0001≦a≦0.15, 0.1<b≦3, and 2<c≦4.5;Gd3-p-qCerRE′qAl5-rGarO12  (3)wherein in Formula (3), 0.0001≦p≦0.15, 0.1<q≦3, 1<r≦4.5, and RE′ represents Y or Yb.
Owner:FURUKAWA COMPANY +1
A kind of l-type zeolite/polymer luminescent material and preparation method thereof
InactiveCN102260494AIncreased fluorescence lifetimeImprove stabilityLuminescent compositionsFluorescenceLight-emitting diode
The invention is an L-type zeolite / high polymer luminescent material and a preparation method thereof. The material is composed of zeolite, rare earth ion (Ln3+), organic ligand and macromolecule; its proportion is: 0.0025-0.25mmol rare earth ion / 100mg zeolite / 8mg organic ligand, and the mass ratio is zeolite-rare earth organic complex:high Molecule=1~5:100. In the present invention, the method of copolymerizing the zeolite loaded with the rare earth organic complex and the polymer effectively suppresses the influence of water molecules and other organic molecules on the luminescence of the rare earth organic complex in the zeolite channel, and at the same time inhibits the leakage of the organic molecule from the zeolite channel, and The material is optically transparent and exhibits the characteristic fluorescence of rare earth ions under ultraviolet light, and can be used in infrared plastic light-emitting diodes, optical data storage devices such as dye nanostructure materials, and improving the physical and chemical properties of polymers.
Owner:HEBEI UNIV OF TECH
Preparation method of all-inorganic perovskite quantum dots serving as blue-violet light source
PendingCN110922968AReduce contentLow toxicityNanotechnologyLuminescent compositionsPhysical chemistryQuantum dot
The invention discloses a preparation method of all-inorganic perovskite quantum dots serving as a blue-violet light source. The method comprises the following steps: heating, mixing and stirring Cs2CO3, oleic acid and octadecene, to form a precursor solution; heating lead halide and zinc halide, adding into a mixed solution of oleic acid, octadecene and oleylamine, heating to T1, and stirring toform a halide solution; heating the halide solution to T2, then adding the precursor solution, carrying out reaction of the halide solution and the precursor solution for t, to form Cs(Pb(1-x)Znx)(AyB(1-y))3, and then rapidly cooling, to obtain a coarse all-inorganic perovskite quantum dots serving as the blue-violet light source, wherein x is greater than 0 and smaller than 1, A and B are Cl, Bror I, and y is greater than or equal to 0 and smaller than or equal to 1. As the components of the precursor solution are not stable, the precursor solution is injected into the halide solution by adopting a hot injection method, a Cs(Pb(1-x)Znx)(AyB(1-y))3 quantum dot solution can be effectively and uniformly formed, and a heating process when the precursor solution starts to react is omitted. Znis used for replacing part of Pb, so that on one hand, the content of Pb in the perovskite can be reduced, and the toxicity of the perovskite is reduced.
Owner:NINGBO UNIV
Illuminant and radiation detector
InactiveCN106459758AShort fluorescence lifetimeShort radiation resistancePolycrystalline material growthMeasurement with scintillation detectorsLuminous intensityLuminophore
Owner:TOHOKU TECHNO ARCH CO LTD +1
Tunable laser crystal chrome-mixing magnesium molybdate and preparation method thereof
InactiveCN102534792ARaw materials are easy to getModerate mechanical propertiesPolycrystalline material growthFrom melt solutionsSpace groupFluorescence
The invention provides a tunable laser crystal chrome-mixing magnesium molybdate and a preparation method thereof. A fused salt top-seeded method is adopted, 55-80at.%K2Mo2O7 serves as a fluxing agent, growth parameters include that cooling speed is 0.5-5 DEG C / day, growth temperature is 700-880 DEG C, rotation speed is 5-30 turns / minute, and high quality big-sized Cr 3+: MgMoO4 crystal is grown. The crystal belongs to a monoclinic system and has a C2 / m space group structure, and a=10.273, b=9.288, c=7.025, beta=106.96 degrees, z=8, V=641.14, and Dc=3.82 g / cm3. The crystal has the advantages of being moderate in mechanical performance, wide in tunable laser wave band, big in emission section, short in fluorescence service life and the like and is a good tunable laser crystal material.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Light emission glass for laser lighting and preparation method of light emission glass
The invention belongs to the field of laser lighting light emission materials and discloses light emission glass for laser lighting and a preparation method of the light emission glass. The light emission glass comprises a borosilicate glass substrate and a Pb-based perovskite nano crystal, wherein the Pb-based perovskite nano crystal is uniformly distributed into the borosilicate glass substrate;every 100mol by mass of the borosilicate glass substrate comprises 40-50mol of B2O3, 20-30mol of SiO2, 8-15mol of Na2O and 12-20mol of SrO; and the amount of the doped Pb-based perovskite nano crystal accounts for 0.1-5% of the mass of the borosilicate glass substrate. As detail constitution and component proportions of the glass substrate and the doped nano crystal, the overall process proceduredesign of the preparation method, temperatures, treatment time and the like of stages of key temperature treatment processes, and the like of the light emission material are improved, high efficiencyand high stability of the light emission glass for laser lighting can be simultaneously achieved, light emission saturation can be avoided, and options of laser sources can be widened.
Owner:HUAZHONG UNIV OF SCI & TECH
Scintillation microcrystalline glass embedded with YAG microcrystalline phase and preparation method of scintillation microcrystalline glass
InactiveCN108147669ASize limitGuaranteed uniformityMaterial analysis using wave/particle radiationDevitrificationFluorescence
The invention relates to scintillation microcrystalline glass embedded with a YAG microcrystalline phase and a preparation method of the scintillation microcrystalline glass. The scintillation microcrystalline glass and the preparation method thereof are characterized in that the microcrystalline phase is YAG, activation ions are one or two of Ce<3+> and Tb<3+>, the activation ions are evenly doped into the YAG microcrystalline phase, and the YAG microcrystalline phase is evenly distributed in the scintillation microcrystalline glass; the chemical components of matrix glass are only yttrium oxide and aluminum oxide, the matrix glass is doped with the rare-earth ions Ce<3+> and Tb<3+>, transparent glass is prepared by a container-free solidification method or a flame floatation method, thetransparent glass is subjected to thermal treatment under Tg temperature, and the YAG microcrystalline phase is spontaneously separated out without devitrification; the YAG microcrystalline glass is high in crystallinity and transparency, short in fluorescence service life, excellent in scintillation performance, capable of emitting green light, green and yellow light or yellow light under X-ray excitation and capable of being used as an X-ray detection scintillation material.
Owner:WUHAN UNIV OF TECH
Red fluorescent substance and method for production thereof
InactiveCN107955604AShort fluorescence lifetimeHigh emission intensityLuminescent compositionsSemiconductor devicesFluorescenceDisplay device
A red fluorescent substance includes an Mn-activated complex fluoride represented by the formula (1) below: A<1>2MF6:Mn (1) (wherein, letter M is one or two or more of tetravalent elements selected from Si, Ti, Zr, Hf, Ge, and Sn, with Ti or Ge being essential; and symbol A<1> is one or two or more of alkali metals selected from Li, Na, K, Rb, and Cs, with at least one of Na, Rb, and Cs being essential), wherein the red fluorescent substance has an emission spectrum having a peak between 600 to 650 nm, a fluorescent life time up to 5.0 milliseconds at room temperature, and an internal quantumefficiency at least 0.60 at the time of excitation at 450 nm. Because of the short fluorescent life time, high emission intensity, and high emission efficiency, the red fluorescent substance is suitable for use in the display device that needs high-speed high-definition rendering.
Owner:SHIN ETSU CHEM IND CO LTD
Rare earth phosphate scintillating glass and preparation method of same
InactiveCN103319087AShort fluorescence lifetimeImprove radiation resistanceRare-earth elementAlkali metal
The invention discloses rare earth phosphate scintillating glass and a preparation method of the same, and relates to the field of inorganic rare earth luminous material. Trivalence cerium ions (Ce 3+) are added into a M2O-RE2O3-P2O5 phosphate glass system, and a transparent rare earth scintillating glass is produced. In the phosphate system, M is an alkali metal element and RE is a rare earth element. The transparent rare earth scintillating glass is produced through processes of mixing raw materials, pre-sintering, melting, moulding and annealing. The prepared transparent rare earth phosphate scintillating glass has strong light output in the range of 310 to 430 nanometers under the radiation of X-rays. The fluorescence attenuation lifetime is around 30 nanoseconds, and has a rapid fluorescence attenuation characteristic. The preparation method of rare earth phosphate glittering glass has the advantages of simple preparation technology, low production cost, strong light output, rapid fluorescence attenuation, and wide application prospect in high-energy ray detection field.
Owner:SUN YAT SEN UNIV +1
Preparation method for metal coordinated polymer long-life luminescent material and application
InactiveCN109608439AEfficient separationShort lifeGroup 1/11 organic compounds without C-metal linkagesOrganic chemistry methodsSingle bondSolid-state
The invention provides a metal coordinated polymer material capable of rapidly transmitting phosphorescence, a preparation method for the metal coordinated polymer material and an application of the metal coordinated polymer material. According to the material, a compound represented by a formula (I) shown in the description is a ligand compound, wherein X, Y and Z each is independently selected from N and C; ~Q-R2 is selected from a formula shown in the description and a formula shown in the description; when the ~Q-R2 is the formula shown in the description, the structure is directly connected with the Z; when the ~Q-R2 is the formula shown in the description, the structure is connected with the Z through a single bond; R1 is selected from H, -COOH and -COOCH3; R2 is selected from H, a formula shown in the description and a formula shown in the description; and R3 is selected from -COOH and -COOCH3. The invention provides a series of efficient novel D-A long-life luminescent materials, novel ways of think and novel methods for material synthesis of efficient novel D-A long-life luminescent devices are provided, and a new breakthrough for achieving further development of full-color display and solid-state luminescence is found.
Owner:SHANDONG NORMAL UNIV
Full solid state electro-optic modulation Q green laser
InactiveCN101447639AIncrease the degree of spatial overlapQuality improvementOptical resonator shape and constructionActive medium materialPolarizerMaterials processing
A full solid state electro-optic modulation Q green laser adopts a V-shaped folding cavity. An optical coupled system, a plano-concave front cavity mirror, a laser crystal, a polarizer, a 1 / 4 wave plate, an electro-optic modulation Q crystal and a negative meniscus shaped refrative mirror are sequentially arranged along the direction of advance of the laser output by a laser diode. The reflected light path of the negative meniscus shaped refrative mirror is sequentially provided with a frequency doubling crystal and a plano-concave rear cavity mirror. The laser has the advantages of compact structure, high output pulse repetition rate, narrow pulse width, high beam quality, and the like, and can be widely applied to the fields such as laser material processing, laser color display, laser medicine, military confrontation, undersea detection, etc.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Electroluminescent material and electroluminescent element using the same
InactiveUS20070085470A1Short fluorescence lifetimeGood mobilityDischarge tube luminescnet screensElectroluminescent light sourcesRare-earth elementOxide
The present invention provides electroluminescent materials that emit very bright light with little energy consumption, little loss of energy converted into heat, etc., and suffers from little deterioration due to long-term use, in particular, inorganic electroluminescent materials that emit blue to green light having a wavelength shorter than yellow. Specifically, the present invention relates to the following three types of electroluminescent material: (1) An electroluminescent material including an oxide having a perovskite-type crystal structure represented by General Formula RMO3, wherein R is at least one rare-earth element, and M is at least one member selected from the group consisting of Al, Mn, and Cr; (2) an electroluminescent material including an oxide having a perovskite-type crystal structure represented by General Formula R2CuO4, wherein R is at least one rare-earth element; and (3) an electroluminescent material including an oxide having a perovskite-type crystal structure represented by General Formula RZ2Cu3O6, wherein R is at least one rare-earth element, and Z is at least one alkali-earth metal.
Owner:JAPAN SCI & TECH CORP +1
Method for regulating fluorescence lifetime of near-infrared core-shell structure nanocrystal
InactiveCN108277004AModulation of fluorescence lifetimeIncreased non-radiation transition speedLuminescent compositionsTime gatingFluorescence
The invention discloses a method for regulating the fluorescence lifetime of a near-infrared core-shell structure nanocrystal, and relates to a method for regulating the fluorescence lifetime of the near-infrared nanocrystal. The method solves the technical problem that the fluorescence lifetime of an existing rare earth doped nanocrystal cannot be regulated. The method comprises the following steps: enabling the near-infrared core-shell structure rare earth doped nanocrystal to be of a cubic phase NaYF4:Yb,Nd,E@CaF2, a hexagonal phase NaYF4:Yb,Nd,E@NaYF4, a hexagonal phase NaYF4:Yb,Nd,E@NaLuF4 or a hexagonal phase NaYF4:Yb,Nd,E@NaGdF4, wherein fixedly doped ions are Yb and Nd, a variably doped ion is E, and E is Yb, Er, Ho, Tm or Nd; and the fluorescence lifetime of the nanocrystal is regulated by changing the concentration of the E ion. The time gating imaging technology can be applied onto compound imaging by regulating the nanocrystals with different fluorescence lifetimes synthesized in a near-infrared region.
Owner:HARBIN INST OF TECH
Terbium doped phosphate-based green luminescent material and preparation method thereof
ActiveUS20120292570A1High luminous intensityEasy to controlBarium aluminatesPhosphorus compoundsRare-earth elementPre treatment
Terbium doped phosphate-based green luminescent material and preparation method thereof are provided. The chemical formula of the material is M3RE1-xTbx(PO4)3, wherein, M is alkaline-earth metals, RE is rare-earth elements, x is in a range of 0.001 to 1. The preparation method of the material includes the following steps; providing the compound used as the source of alkaline earth metal, the compound used as the source of phosphate, the compound used as the source of rare-earth, and the compound used as the source of Tb3+ according to the molar ratio of the elements in M3RE1-xTbx(PO4)3, wherein, the compound used as the source of phosphate is added at excess molar ratio in a range of 10% to 30%; mixing and grinding the compound to get mixture; sintering the mixture as pre-treatment, and then cooling the mixture to get a sintered matter; grinding; calcining in reducing atmosphere, and then cooling them.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD
Red divalent bismuth ion doping calcium phosphate fluorescent material and preparation method thereof
InactiveCN102304360AGood resistance to thermal quenchingShort fluorescence lifetimeLuminescent compositionsBismuthCalcium biphosphate
The invention relates to a preparation method of a red divalent bismuth ion doping calcium phosphate fluorescent material, which comprises the following steps of: taking a compound raw material containing calcium, phosphorus and bismuth, wherein the molar ratio of calcium: phosphorus: bismuth: 2 (1-x): 2: 2x, wherein X is larger than or equal to 0.00001 and is less than or equal to 0.08; grinding, uniformly mixing and then presintering, and controlling the temperature to be in the range of 900 to 1200 DEG C; after presintering, grinding again, uniformly mixing and then burning at high temperature, controlling the temperature to be in the range of 800-1000 DEG C; and finally placing a sample at the reducing atmosphere of 900-1200 DEGC for reacting for 15 minutes to 10 hours. The fluorescent material prepared by the method has the ultraviolet and blue light spectral region absorption function, has red fluorescent lights covering 600nm-750nm sections under the excitation of ultraviolet or blue lights; the fluorescence lifetime of the fluorescent material is about 10 microseconds; the fluorescence light of the fluorescent material has good heat resistance hardening characteristic; when the temperature is risen from 10k to the room temperature, the fluorescent intensity of the fluorescent material is reduced by less than 10%, and the fluorescence lifetime of the fluorescent material is shortened by less than 5%.
Owner:SOUTH CHINA UNIV OF TECH
Method for enhancing rhodamine B isothiocyanate fluorescence intensity through silver nanoparticle aggregation
ActiveCN109696428AImprove acceleration performanceExcellent fluorescence performanceFluorescence/phosphorescenceCouplingEmission efficiency
The invention discloses a method for enhancing rhodamine B isothiocyanate fluorescence intensity through silver nanoparticle aggregation. The method comprises the following steps: (1) preparing silvernanoparticles; (2) modifying the surfaces of the silver nanoparticles with rhodamine B isothiocyanate to obtain silver nanoparticles with the surfaces modified with rhodamine B isothiocyanate; and (3) adding a connecting agent, and aggregating the silver nanoparticles with the surface modified by rhodamine B isothiocyanate to enhance the fluorescence intensity of the rhodamine B isothiocyanate. According to the method, a hot spot generated by aggregation and coupling of precious metal nanoparticles is mainly utilized, so that a local electric field among the nanoparticles is remarkably enhanced, the fluorescence emission efficiency of rhodamine B isothiocyanate on the surface of the nanoparticles is improved, and rhodamine B isothiocyanate fluorescence quenched by silver nanoparticles under monodispersion is recovered and even enhanced. The method is obvious in fluorescence enhancement, the sample can be dispersed in a water phase, and fluorescence change is obvious before and after aggregation.
Owner:SOUTH CHINA UNIV OF TECH
Perovskite quantum dot material and preparation method and application thereof
ActiveCN113604220AHigh quenching pressureShort fluorescence lifetimeMaterial nanotechnologyNanoopticsCerium bromideCentrifugation
The invention provides a perovskite quantum dot material and a preparation method and application thereof, wherein the preparation method comprises the following steps: mixing cesium carbonate, octadecene and oleic acid under a vacuum condition, and heating until the cesium carbonate and the oleic acid are completely reacted to obtain a cesium oleate solution; heating and dissolving lead bromide and octadecene under a vacuum condition to obtain a lead precursor solution; heating cerium bromide and oleic acid under a vacuum condition until the cerium bromide is completely dissolved to obtain a cerium precursor solution; and respectively injecting oleylamine and a cerium precursor solution into the lead precursor solution under environmental conditions, heating the mixed solution to 170-190 DEG C until lead bromide is completely dissolved under vacuum conditions, then injecting a cesium oleate solution into the mixed solution under environmental conditions, carrying out stirring reaction for 40-80 seconds, and carrying out ice-water bath cooling and centrifugation to prepare the cerium ion doped perovskite quantum dot material. The rare earth ion doped perovskite quantum dot material can effectively solve the problem that fluorescence quenching easily occurs in a high-pressure environment in an existing perovskite quantum dot material.
Owner:NORTHEAST DIANLI UNIVERSITY
UCNPs @ MIL-53 nano composite material and preparation method thereof
InactiveCN109224085AControl plasma levelsImprove stabilityPharmaceutical non-active ingredientsIn-vivo testing preparationsControlled releaseBiological imaging
The invention relates to a UCNPs @ MIL-53 nano composite material and preparation method thereof, comprise up-converting fluorescent material UCNPs of parent nucleus and organically coat that parent nucleus UCNPs; Metal skeleton material MIL-53, and that particle size of the parent nucleus UCNPs is 153-0nm, UCNPs@MIL The particle size of 53 nanocomposites is 50-100nm. The UCNPs @ MIL-53 nanocomposites will upconvert the unique fluorescence properties of fluorescent nanomaterials with MIL-53 Combined with excellent drug-loading materials, it is expected to achieve a dual-functional therapeuticsystem integrating biological imaging and drug controlled release.
Owner:QINGDAO UNIV
Dysprosium doped lead fluoride crystal and preparation method thereof
InactiveCN102051682ALow phonon energyShort fluorescence lifetimePolycrystalline material growthFrom frozen solutionsFluorescenceLead fluoride
The invention relates to a dysprosium doped lead fluoride crystal which has a molecular formula of DyxPbF2+3x, wherein x is the doping concentration of Dy<3+> and is equal to 0.1-10 mol percent. The crystal grows by adopting a melt method. A preparation method of the dysprosium doped lead fluoride crystal comprises the following steps of: 1, selecting the value of x, weighting the initial raw materials of DyF3 and PbF2 in a crystal growing formula according to the molecular formula of the DyxPbF2+3x in accordance with the stoichiometric proportion, wherein x=0.1-10 mol percent; and 2, uniformly mixing the weighted raw materials in the proportion, drying in vacuum and pressing into blocks, placing a graphite or platinum crucible, with a PbF2 crystal as a seed crystal, growing gases of atmosphere of argon or CF4 and the like. The dysprosium doped lead fluoride crystal has lower phonon energy, longer fluorescence lifetime and larger absorbing and transmitting section, and is possible to apply to an all-solid laser of 2-5mum waveband.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Apparatus and method for investigating molecule
InactiveCN103087904AEnhanced Single Molecule DetectionLocation determinationBioreactor/fermenter combinationsNanotechResonanceElectromagnetic field
Provided is an apparatus for investigating a molecule comprising a channel disposed in a substrate, a metallic moiety capable of plasmon resonance which is associated with the channel in a position suitable for the electromagnetic field produced by the metallic moiety to interact with a molecule passing therethrough, means to induce a molecule to pass through the channel, means to induce surface plasmon resonance in the metallic moiety; and means to detect interaction between the electromagnetic field produced by the metallic moiety and a molecule passing through the channel. Methods of investigating molecules are also provided.
Owner:BASE4 INNOVATION LTD
Two-dimensional organic-inorganic hybrid perovskite scintillator capable of simultaneously detecting gamma rays and fast neutrons and preparation of two-dimensional organic-inorganic hybrid perovskite scintillator
ActiveCN114196396AEfficient deliveryShort fluorescence lifetimeMeasurement with scintillation detectorsX/gamma/cosmic radiation measurmentProtonationGamma ray
The invention belongs to the technical field of crystal material application, and discloses a two-dimensional organic-inorganic hybrid perovskite scintillator capable of simultaneously detecting gamma rays and fast neutrons and preparation of the two-dimensional organic-inorganic hybrid perovskite scintillator, the chemical formula of the organic-inorganic hybrid perovskite scintillator material is A2PbBr4 or A2PbBr4-xClx, wherein A is a protonated phenylethylamine (PEA) ion, a protonated benzimidazole (BI) ion or a protonated butylamine (BA) ion, x is 0-0.8, and the probe can be applied to detection of fast neutrons or simultaneous detection of gamma rays and fast neutrons. The two-dimensional organic-inorganic hybrid perovskite scintillator material composed of specific elements contains a large number of hydrogen atoms and heavy atoms at the same time, so that under excitation of gamma rays or fast neutrons, the material has high light yield and fast attenuation, and the scintillator is excellent in performance and especially can be used for detecting gamma rays and fast neutrons at the same time.
Owner:HUAZHONG UNIV OF SCI & TECH
Indolocarbazole diboron derivative as well as preparation and application thereof
PendingCN114106028AExtended Resonant BackboneImprove color gamut coverageSolid-state devicesSemiconductor/solid-state device manufacturingOrtho positionBoron atom
The invention belongs to the technical field of preparation and application of organic photoelectric materials, and discloses an indolocarbazole diboron derivative and preparation and application thereof.According to the indolocarbazole-based diboron derivative, R1 and R2 are introduced to the two sides of five types of indolocarbazole such as indolo [2, 3-a] carbazole; r1 and R2 are selected from aromatic amine groups with the carbon atom number of 6-30 and aromatic amine heterocyclic groups with the carbon atom number of 6-30; and atoms for bonding R1 and R2 with boron atoms are carbon atoms and are positioned on ortho-positions of nitrogen atoms contained in R1 or R2. The diboron derivative of indolocarbazole disclosed by the invention can realize narrowing of the half-peak width of a luminescent spectrum based on a boron-nitrogen multiple resonance effect, can realize regulation and control of the luminescent spectrum in a relatively large range based on molecular conjugation regulation and control, is relatively wide in color gamut coverage range, and can be used as a luminescent material to be applied to an organic electroluminescent device to obtain relatively high device efficiency.
Owner:HUAZHONG UNIV OF SCI & TECH
Luminescent glass for laser lighting and preparation method thereof
ActiveCN110395910BIncrease choiceLuminous stabilityGlass furnace apparatusLight emissionLaser illumination
The invention belongs to the field of laser lighting light emission materials and discloses light emission glass for laser lighting and a preparation method of the light emission glass. The light emission glass comprises a borosilicate glass substrate and a Pb-based perovskite nano crystal, wherein the Pb-based perovskite nano crystal is uniformly distributed into the borosilicate glass substrate;every 100mol by mass of the borosilicate glass substrate comprises 40-50mol of B2O3, 20-30mol of SiO2, 8-15mol of Na2O and 12-20mol of SrO; and the amount of the doped Pb-based perovskite nano crystal accounts for 0.1-5% of the mass of the borosilicate glass substrate. As detail constitution and component proportions of the glass substrate and the doped nano crystal, the overall process proceduredesign of the preparation method, temperatures, treatment time and the like of stages of key temperature treatment processes, and the like of the light emission material are improved, high efficiencyand high stability of the light emission glass for laser lighting can be simultaneously achieved, light emission saturation can be avoided, and options of laser sources can be widened.
Owner:HUAZHONG UNIV OF SCI & TECH
Kit, probe and method for rapid and sensitive detection of ofloxacin
ActiveCN111398576AExpensive to solveResolution cycleMicrobiological testing/measurementBiological testingAptamerMagnetic bead
The invention discloses a kit, a probe and a method for rapid and sensitive detection of ofloxacin. The kit comprises a nano magnetic bead-nucleic acid aptamer probe, an RCA primer, an RCA template, aT4 DNA ligase, a Phi29 DNA polymerase and a NaYF4: Ce / Tb-cDNA time-resolved fluorescent probe. Fe3O4 nano magnetic beads are used as a rapid magnetic separation carrier, a nucleic acid aptamer specifically combined with ofloxacin is used as a recognition element, a nucleic acid signal is amplified through a rolling circle amplification technology, and time-resolved fluorescence is used as a signal source so that a novel technology for specific rapid sensitive detection of residual antibiotic ofloxacin in food is constructed. The method is short in detection period without depending on the chromatographic instrument and high in sensitivity and is as low as pmol / L in detection limit and quantification limit and is suitable for detection personnel in the market or enterprises.
Owner:XIHUA UNIV
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