4761results about "Nanooptics" patented technology

Tailored doping of barrier layers enables balancing of the radiative recombination among the multiple-quantum-wells in III-Nitride light-emitting diodes. This tailored doping enables more symmetric carrier transport and uniform carrier distribution which help to reduce electron leakage and thus reduce the efficiency droop in high-power III-Nitride LEDs. Mitigation of the efficiency droop in III-Nitride LEDs may enable the pervasive market penetration of solid-state-lighting technologies in high-power lighting and illumination.

The invention discloses a synthesis method of amphiphilic quantum dots and application of the amphiphilic quantum dots in nano oil displacement, and belongs to the field of nano oil displacement. The synthesis method comprises the following steps: heating a mixture containing a carbon source and a nitrogen source in an air atmosphere for reaction, and centrifuging, filtering and drying a reaction product to obtain the amphiphilic quantum dots, the carbon source is selected from at least one of glucose, mannose, citric acid, lignin, chitosan and starch; the nitrogen source is selected from at least one of alkylamine, and the carbon chain length of the alkylamine is C6 to C12. The synthesis method is simple, heating of a high-pressure reaction kettle is not needed, the technological process is simple, and the method is suitable for large-scale industrial production; the series of amphiphilic carbon quantum dots show better solubility and higher absolute fluorescence quantum yield in water and various organic solvents.

The invention discloses a high-detection-efficiency long-wave infrared spectrum imaging device and an imaging method, and belongs to the field of micro-nano optical design, the scheme is as follows: a metasurface spectrum modulation layer is composed of a square matrix formed by arranging a plurality of metasurface periodic units in sequence, and each metasurface periodic unit is composed of a plurality of metasurface structure units; each metasurface structure unit comprises a substrate and a plurality of nano columns, and the plurality of nano columns are distributed on the substrate in a C4 symmetrical structure; reverse design of the high-transmittance metasurface structure units is achieved through a particle swarm optimization algorithm, and structure parameters of the high-transmittance metasurface structure units are obtained; incident light passes through the metasurface spectrum modulation layer to realize spectrum coding, coding information is converted into an electric signal by a long-wave infrared focal plane detection pixel below, and a high-resolution long-wave infrared spectrum image can be reconstructed in cooperation with a deep neural network algorithm. The spectral imaging method provided by the invention is perfectly compatible with semiconductor and MEMS technologies, and long-wave infrared band spectral imaging with high detection efficiency is realized.

The invention provides a zeolite imidazate framework fluorescent material and a preparation method and application thereof, and belongs to the technical field of detection material preparation and environment. Quantum dots, a molecular imprinting technology and an MOFs material are combined, firstly, Mg and N co-doped graphene quantum dots and ZIF-8 are compounded, then imprinting is carried out on the surface of ZIF-8, and the zeolite imidazate framework fluorescent material based on MOFs is obtained. In the zeolite imidazate framework fluorescent material, Mg and N co-doped graphene quantum dots not only have good fluorescence performance, but also can generate electron transfer with SDZ to form hydrogen-bond-like acting force, imprinted holes similar to a target object in size and shape are reserved in the surface of the imprinted material, and the target object needing to be detected can be selectively recognized; the zeolite imidazate framework fluorescent material can be used for detecting sulfadiazine in the environment and has good practicability.

A semiconductor nanoparticle, a production method, and an electroluminescent device including the same. The semiconductor nanoparticle includes zinc, sulfur, and selenium, and the semiconductor nanoparticle comprises a first semiconductor nanocrystal; and a semiconductor nanocrystal shell including zinc and sulfur disposed on the first semiconductor nanocrystal, and the semiconductor nanoparticle does not include cadmium; the semiconductor nanoparticle further includes a plurality of organic ligands (or a ligand system), that include a first organic ligand having a carboxylate moiety and a second organic ligand having a carboxylate moiety different from the first organic ligand. In a gas chromatography analysis, the semiconductor nanoparticle exhibits a first peak assigned to the first organic ligand and a second peak assigned to the second organic ligand, wherein an area percentage of the first peak relative to the second peak is greater than or equal to about 1% and less than or equal to about 300%.

The invention discloses a metal-doped carbon quantum dot as well as preparation and application of the metal-doped carbon quantum dot in a nano antibacterial agent, citric acid, urea and tea polyphenol are taken as precursors, metal salt is added, carbon dot synthesis and metal ion doping are synchronously completed in one step through a hydrothermal method, and the metal-doped carbon quantum dot is prepared; the surfaces of the metal-doped carbon quantum dots are negatively charged, and the metal-doped carbon quantum dots have peroxidase-like activity and catalase-like activity at the same time; the metal ions adopt any one of Fe < 3 + >, Cu < 2 + > and Ce < 3 + >; the metal-doped carbon quantum dots are in a sphere-like shape. The metal-doped carbon quantum dots prepared by the preparation method disclosed by the invention have peroxidase-like activity and catalase-like activity at the same time through precise doping of metal ions, and the two activities have a synergistic effect in an oral periodontitis microenvironment, so that a good antibacterial effect is achieved.

The invention relates to a carbon quantum dot for strengthening and promoting growth of microalgae and application thereof. In the process of preparing the carbon quantum dots by a conventional hydrothermal method, a precursor mixture is subjected to acidification modification in advance, the pH value is adjusted to 2 by using nitric acid, and then a hydrothermal reaction is performed, so that the prepared carbon quantum dots have the capability of promoting the growth of microalgae. However, if other acids are adopted or pH adjustment is not in place, the effect cannot be achieved, and even the inhibition effect can be achieved. The obtained product is good in effect and stable in performance, no special reaction device needs to be additionally arranged in the acidification modification process, and the method has the advantages that operation is easy and convenient, raw materials are easy to obtain, and the process can be quantified; the method is simple and convenient in process operation, has universality and is easy for industrial production.

A multirail-encoded qubit can be implemented using a quantum system having a state space that includes a number M of distinct modes, where M is an integer greater than 2. The M modes are logically partitioned into two disjoint subsets (or “bands”), with each mode assigned to exactly one of the bands. The multirail encoding is defined such that a state in which any one of the modes in the first band is occupied and all modes in the second band are unoccupied maps to a logical 0 state of the qubit, and a state in which any one of the modes in the second band is occupied and all modes of the first band are unoccupied maps to a logical 1 state. Systems and methods for generating, measuring, and operating on multirail-encoded qubits are disclosed.

The invention provides a nitrogen-doped biomass-based fluorescent carbon quantum dot, a preparation method and application, and relates to the technical field of carbon nanomaterials, the method comprises the following steps: mixing a biomass material and deionized water under an ultrasonic condition, adding a nitrogen source, and carrying out ultrasonic dispersion to obtain a uniformly dispersed to-be-reacted solution; reacting the to-be-reacted solution at a preset temperature for a preset time to obtain a mixed product solution; and filtering and dialyzing the mixed product solution to obtain the nitrogen-doped biomass-based fluorescent carbon quantum dot solution. The nitrogen-doped biomass-based fluorescent carbon quantum dot prepared by the method shows a stable fluorescent effect and good water solubility, the free radical clearance rate can reach 90% or above, and the antibacterial rate can reach 99% or above. The method can be used in the fields of drug sustained release, bioimaging and the like.

The invention relates to the technical field of luminescent composite nano materials, in particular to a small-particle-size composite material, a preparation method thereof and application of the small-particle-size composite material in fluorescence imaging. The small-particle-size composite material comprises carbon quantum dots and CsMnCl3 nanoparticles, the surfaces of the carbon quantum dots are modified with carboxyl groups, and the carbon quantum dots and the CsMnCl3 nanoparticles are connected through amido bonds formed by dehydration condensation of amino groups and carboxyl groups. The small-particle-size composite material provided by the invention has a blue light emission peak at the excitation wavelength of 360-400nm and the wavelength of 440-500nm, not only has higher fluorescence emission intensity and can be used as a fluorescent dye, but also can solve the problems, has temperature sensing performance and is wide in application range.

An electro-optic modulation structure 110, a method for fabrication of the electro-optic modulation structure, and a method of optical modulation derived from an electro-optic modulation structure with low voltage of operation are disclosed. The low voltage operation of the electro-optic modulator is realized by designed electro-optic modulation structures that include the light confining waveguide 114, overclad layer 120 and modulating electrode structure 116 for applying modulation voltages that are directed towards a low voltage operation of the electro-optic modulation 110 device upon consideration of optimal optical loss.

The invention discloses a fluorescent composite nano material as well as a preparation method and application thereof, and belongs to the technical field of fluorescent materials. The fluorescent composite nano-material provided by the invention comprises carbon quantum dots with carboxyl modified surfaces and fluorescent nano-particles with amino modified surfaces, wherein the mass ratio of the carbon quantum dots to the fluorescent nano-particles is (0.8-3): 1; the carbon quantum dots of which the surfaces are modified with carboxyl groups are connected with the fluorescent nanoparticles of which the surfaces are modified with amino groups through amido bonds formed by dehydration condensation of carboxyl groups and amino groups; the molecular formula of the fluorescent nanoparticles is Cs2NaYCl6: Yb < 3 + > / Eu < 3 + >, the molar concentration of doped Yb < 3 + > is 15-25%, and the molar concentration of doped Eu < 3 + > is 8-12%. The fluorescent composite nanomaterial provided by the invention has the advantages of uniform particle size and high fluorescence emission intensity, has good fluorescence stability, and can be applied to the fields of humidity detection, fluorescence imaging and the like.

The present invention is a photosensitive resin composition including: (A) a (meth)acryloyl group-containing resin; (B) a photo-radical generator; and (C) a quantum dot, wherein the quantum dot has a surface coating layer containing siloxane. This can provide: a photosensitive resin composition capable of easily forming a film having high lithography resolution and favorable luminous properties; a photosensitive resin film obtained by using the photosensitive resin composition; patterning processes using these; and a light emitting device obtained by using the photosensitive resin composition.

Devices configured to emit colored light when illuminated with ultraviolet light and color-shifting displays containing the same are disclosed.

The invention provides a method for improving the illumination stability of perovskite through post-treatment. The method comprises the following steps: S1, preparing a perovskite illuminant; s2, grinding and diffusing; and S3, inducing exposure and passivation of photoinduced defects. According to the invention, the light stability of the perovskite illuminant synthesized in a temperature solid state can be improved, so that the perovskite illuminant is applicable to wider application fields.

The invention provides a patterned photonic crystal laser and a preparation method thereof, the laser comprises a substrate, and a first mask layer, a photonic crystal layer and a second mask layer which are sequentially deposited on the substrate, a light emitting area is etched in the central area of the second mask layer, and transparent conductive layers are deposited on the surface of the second mask layer and the light emitting area; a p-annular electrode is arranged on the surface of the transparent conductive layer on the second mask layer, and an n-annular electrode is arranged below the substrate; the photonic crystal layer is composed of a nanorod array and a polymer filled in gaps of nanorods; holes distributed in a patterned array are etched in the surface of the first mask layer, and nanorods are epitaxially grown in hole areas; the nanorod is formed by sequentially depositing a substrate contact layer, a first waveguide layer, a multi-quantum well layer, a second waveguide layer, a coating layer and a component gradient layer. According to the invention, through collaborative design optimization of all the layers, emission of laser with specific wavelength and preparation of a laser emitting laser with single longitudinal mode, narrow linewidth and stable wavelength are realized.

The invention belongs to the technical field of biomedical materials, and discloses injectable heterogeneous cascade nano-enzyme antibacterial hydrogel as well as a preparation method and application thereof. The preparation method comprises the following steps: in a process of preparing cerium dioxide nano-enzyme by a reverse micelle method, introducing molybdenum disulfide nano-particles with a nano flower-shaped structure so as to deposit the cerium dioxide nano-enzyme on the surfaces of the molybdenum disulfide nano-particles in situ to obtain nano-composite particles; through electrostatic interaction, glucose oxidase is loaded on the surfaces of the nano composite particles to form a heterogeneous cascade nano enzyme material; the preparation method comprises the following steps: uniformly mixing sodium alginate and hyaluronic acid in water, and sequentially adding an NO donor, a heterogeneous cascade nano-enzyme material and a cross-linking agent to obtain the injectable heterogeneous cascade nano-enzyme antibacterial hydrogel. The preparation method is simple, and the injectable heterogeneous cascade nano-enzyme antibacterial hydrogel has a strong antibacterial effect and can be used for preparing the antibacterial hydrogel. Particularly, the compound has a remarkable killing effect on gram-negative bacteria and gram-positive bacteria.

The invention relates to a preparation method and application of polysaccharide-based fluorescent carbon quantum dots with adjustable emission wavelength, and belongs to the technical field of preparation of fluorescent carbon nanomaterials. Polysaccharide is respectively mixed with different nitrogen dopants o-phenylenediamine, m-phenylenediamine and p-phenylenediamine, then the mixture is subjected to a hydrothermal reaction to respectively prepare blue, green and yellow green fluorescent carbon quantum dots, and then the blue, green and yellow green fluorescent carbon quantum dots are applied to nitrite detection. The carbon quantum dots with different emission wavelengths and different colors are obtained by adjusting the types of the nitrogen doping agents, the problems that the emission wavelengths of the carbon quantum dots cannot be adjusted and the range is narrow are solved, and reference is provided for subsequent design and opening of the generator-based multicolor fluorescent carbon quantum dots. Meanwhile, the biological polysaccharide is used as a raw material, deionized water is used as a solvent, the whole technological process is easy to operate and low in cost, and the method has far-reaching significance on further high-value utilization of biomass resources and promotion of sustainable utilization of the biomass resources.

The invention relates to a preparation method and application of a carbon dot-based nano enzyme. The preparation method of the carbon dot-based nano-enzyme comprises the following steps: taking sucralose and B vitamins as raw materials, and preparing the carbon dot-based nano-enzyme through a one-pot hydrothermal method. The preparation method of the carbon dot-based nano-enzyme provided by the invention is simpler in catalytic condition and higher in safety. The carbon dot-based nano-enzyme prepared by the invention has the advantages of high oxidase-like activity, low drug resistance, high biocompatibility and the like, can inhibit multi-drug-resistant bacteria, and can be applied to the aspects of aquatic product preservation and the like.

The invention belongs to the technical field of semiconductor material synthesis, and particularly relates to a high-quantum-efficiency and high-stability cadmium selenide quantum sheet and a preparation method thereof.The high-quantum-efficiency and high-stability cadmium selenide quantum sheet is obtained after the cadmium selenide quantum sheet is dispersed in a solvent and a Z-type ligand is added into the solvent; the cadmium selenide quantum sheet is a purified cadmium selenide quantum sheet; the Z-type ligand is cadmium caprylate; the quantum chip has the characteristic of high luminescence, the quantum efficiency of the synthesized quantum chip reaches up to 95%, and compared with the prior art, the quantum efficiency of the prepared quantum chip is higher; the quantum chip has the characteristic of long-term stability, and after the synthesized quantum chip is added into the cadmium caprylate ligand, the luminous intensity can be basically kept unchanged for several months; according to the preparation method, synthesis preparation in air can be achieved, and compared with the operation that synthesis preparation needs to be carried out under nitrogen or argon, the preparation method is simpler, and the cost is saved.

The invention discloses a preparation method and application of washable tin-based perovskite quantum dots, and the preparation method comprises the following steps: mixing cesium iodide powder, tin iodide powder and mesoporous silica powder, and then placing the mixture in a plasma ball mill for ball-milling diffusion, cesium iodide and tin iodide react in a confinement space of mesoporous silica to generate a CsSn I < 3 >-coated SiO2 composite structure, CsSn I < 3 > quantum dots are dispersed and coated in the mesoporous silica, and the application of the tin-based perovskite quantum dots in the anti-ultraviolet textile fabric is provided. The method has the following beneficial effects that the purpose of remarkably improving the stability of the tin-based perovskite quantum dots and the washing resistance of the textile is achieved.

A quantum dot composite configured to emit green light or red light. The quantum dot composite including a polymer matrix, and a plurality of quantum dots dispersed in the polymer matrix, the plurality of quantum dots include a semiconductor nanocrystal core comprising indium and phosphorus. As determined by differential scanning calorimetry, the quantum dot composite exhibits an intensity of a peak between about 350° C. to about 450° C. that is about 8 times or more and about 13 times or less relative to an intensity of a peak between about 200° C. and about 300° C. in a thermogravimetric analysis graph.

A metalens used for beam shaping, beam-shaping system and the generating method of the metalens are provided by the present application. The metalens is used to shape an incident beam, and a divergence angle at least in one direction of an outgoing beam obtained by shaping is greater than the divergence angle in the same direction of the incident beam.

Several new techniques for designing nanophotonic scintillators which lead to optimal performance and novel functionalities. Important design concepts include the use of absorbing structures inspired by solar cells, angularly-selective structures, and metasurfaces. Scintillators based on conventionally overlooked materials (such as GaAs or GaN) are also disclosed, which are designed to reach efficiencies comparable or superior to state-of-the-art conventional scintillators (such as YAG:Ce and LYSO). Such scintillators provide important enhancement of scintillation yield arising from incorporation of nanophotonic patterns. Additionally, nanophotonic scintillators designed in conjunction with image post processing algorithms (such as deconvolution algorithms, tomographic reconstruction, etc.) are disclosed. These scintillators are designed in order to increase robustness, minimize the required dose / scan time or even the number of scans required in scintillation imaging. These new designs optimize the scintillator for optimal reconstruction.

Provided is a semiconductor nanoparticle complex in which a ligand is coordinated to a surface of a semiconductor nanoparticle. The semiconductor nanoparticle includes In and P, the ligand includes a mercapto fatty acid ester represented by the following general formula, and the mercapto fatty acid ester has an SP value of 9.30 or less. General formula: HS-R1-COOR2 (where R1 is a C1-11 hydrocarbon group and R2 is a C1-30 hydrocarbon group). The present invention can provide a semiconductor nanoparticle complex that keeps high fluorescence quantum yield before and after purification.

The invention discloses an acid responsive nanoprobe as well as preparation and anti-tumor application thereof. The nanoprobe has a core-shell structure, takes a nanoparticle self-assembled by a polycation aggregation-induced emission (AIE) photosensitizer and functional nucleic acid as a core, and takes a hyaluronic acid modified metal polyphenol network as a shell. The nanoprobe utilizes the acid responsiveness and broad-spectrum absorption performance of the metal polyphenol network and the diagnosis and treatment advantages of the polycation AIE photosensitizer to realize the acid responsiveness'switch 'controllable diagnosis and treatment of the tumor nanoprobe. In a neutral environment, the fluorescence is weak, the generation of ROS is less, and the background noise signal of the nanoprobe and the toxicity of non-targeted tissues are reduced; in an acid environment, fluorescence is enhanced, the ROS yield is improved, and the treatment efficiency and the curative effect monitoring accuracy are improved. The nano diagnosis and treatment probe is ingenious in design and simple to prepare, and can realize PDT and gene therapy synergistic anti-tumor, in-situ real-time report of early tumor treatment effect and assistance in precise cancer treatment.

The present application discloses a quantum dot, a preparation method for the quantum dot, and a photoelectric device. The quantum dot comprises a core structure and a shell structure; the shell structure wraps the core structure; the material of the core structure is selected from one or two of CdSe and ZnCdSe; the shell structure is doped with molybdenum ions. The molybdenum ions can compensate for a vacancy defect of a core-shell structure to release surface stress caused based on the vacancy defect, and coordinate exposed anions of the core-shell structure to improve the light-emitting efficiency and stability of the quantum dot.

To allow systems for manufacturing waveguide cells in accordance with various embodiments to be configured and implemented in many different ways.SOLUTION: In many embodiments, various deposition mechanisms are used to deposit a layer(s) of an optical recording material(s) onto a transparent substrate. A second transparent substrate can be provided, and the three layers can be laminated to form a waveguide cell. A suitable optical recording material can vary widely depending on a given application. In some embodiments, the optical recording material deposited has a similar composition throughout a layer. In a number of embodiments, the optical recording material spatially varies in composition, enabling formation of optical elements with varying characteristics. Regardless of the composition of the optical recording material, any method of placing or depositing the optical recording material onto a substrate can be utilized.SELECTED DRAWING: Figure 11

The invention relates to the technical field of luminescent materials, and discloses an aggregation-induced emission material, nanoparticles as well as a preparation method and application thereof, the structural general formula of the aggregation-induced emission material is as follows: # imgabs0 #, R is selected from one of the following structures: # imgabs1 # aggregation-induced emission material takes a pyridine group as an acceptor unit, and the acceptor unit is selected from one of the following structures: 1 # imgabs2 # aggregation-induced emission material; a carbon-carbon double bond and a thiophene unit are used as pi bridges, and diphenylamine, bis (4-ethylphenyl) amine and bis (4-(tert-butyl) phenyl) amine are used as strong electron donors. The donors not only provide strong electron supply ability, but also become efficient rotors due to highly twisted molecular conformation, and endow the aggregation-induced emission material with long emission wavelength and aggregation-induced emission activity.

The invention relates to the technical field of fluorescent probes, in particular to a rare earth up-conversion nano fluorescent probe as well as a preparation method and application thereof. The rare earth up-conversion nano fluorescent probe provided by the invention is of a core-shell structure, NaYF4 nano particles doped with Yb < 3 + >, Tm < 3 + > and Er < 3 + > are taken as an inner core, and a NaTmF4 shell is coated outside the inner core. The rare earth up-conversion nano fluorescent probe provided by the invention can respond to the excitation wavelength of 1208 nm under the excitation of the excitation wavelengths of 980 nm and 1208 nm. Under the excitation of the excitation wavelength of 980 nm, laser with the wavelength of 1208 nm is used for exciting the rare earth up-conversion nano fluorescent probe, the peak value of the rare earth up-conversion nano fluorescent probe at the wavelength of 539.87 nm is increased along with the increase of the power of the excitation wavelength of 1208 nm, and then the good linear response of the rare earth up-conversion nano fluorescent probe to the excitation wavelength of 1208 nm is reflected. Therefore, the method can be applied to the detection of the power of a laser with the wavelength of 1208 nm.