415 results about "Optical stability" patented technology

An anti-reflection material and a polarization film which exhibit superior anti-reflection properties by preventing external light such as sunlight, fluorescent light, etc., from being reflected on a display, which yield a clear image without sparkling and reduces image contrast, and which exhibit superior wear resistance, chemical resistance, and contamination resistance, as well as exhibit optical stability. A hard coat layer is provided on one surface or two surfaces of a transparent substrate directly or via another layer, and an anti-reflection film having a lower refraction index than the hard coat layer is further provide on the hard coat layer. The hard coat layer consists of at least {circle around (1 a polymer polymerizing (metha)acrylate compound having a fluorene structure; {circle around (2 a polymer polymerizing urethane (metha)acrylate compound and ultrafine particles having a high refraction index; and {circle around (3 radiation and / or thermosetting resin and surface-treated titanium oxide ultrafine particles.

Provided are quantum dots having a gradual composition gradient shell structure which have an improvedluminous efficiency and optical stability, and a method of manufacturing the quantum dots in a short amount of time at low cost. In the method, the quantum dots can be manufactured in a short amount of time at low cost using a reactivity difference between semiconductor precursors, unlike in uneconomical and inefficient conventional methods where shells areformed after forming cores and performing cleaning and redispersion processes. Also, formation of the cores is followed by formation of shells having a composition gradient. Thus, even if the shells are formed to a large thickness, the lattice mismatch between cores and shells is relieved. Furthermore, on the basis of the funneling concept, electrons and holes generated in the shells are transferred to the cores to emit light, thereby obtaining a high luminous efficiency of 80% or more. The quantum dot structure is not limited to Group II-IV semiconductor quantum dots but can be applied to other semiconductors quantum dots, such as Group III-V semiconductors quantum dots and Group IV-IV semiconductors quantum dots. Also, the manufacturing method can be utilized in the development of semiconductor quantum dots having different physical properties, and in various other fields.

There are provided an optical connection structure and an optical connection method capable of holding an optical fiber in a close contact state with a simple structure and easily mounting and detaching the optical fiber while enabling connection having an excellent optical stability. The optical connection structure includes a solid-state adhesive connection member having a refraction factor conformance as a single layer sandwiched between end surfaces of opposing optical transmission media or between the optical transmission media and the optical part. It is preferable that the solid-state adhesive connection member be formed by silicone resin or acryl resin.

Disclosed herein is a multilayer nanocrystal structure comprising a nanocrystal alloy core comprising two or more nanocrystals and including an alloy interlayer formed at an interface between the two or more nanocrystals, and one or more layers of nanocrystal shells formed sequentially on the surface of the nanocrystal alloy core, wherein the nanocrystal shells each have different band gaps. The multilayer nanocrystal structure can be applied to various electronic devices owing to its advantages of high luminescence efficiency, superior optical stability, and superior chemical stability.

The invention provides a three-silver low radiation film glass. The film layer structure of the glass comprises glass, a first base layer dielectric combination layer, a first Ag layer, a first blocking layer, a first interlayer dielectric combination layer, a second Ag layer, a second blocking layer, a second interlayer dielectric combination layer, a third Ag layer, a third blocking layer, a first upper layer dielectric combination layer, and a second upper layer dielectric combination layer. The invention also provides a process for producing the glass. The three-silver low radiation film glass and the producing process thereof adopt a unique film layer configuration, the process and a method improve the prior low radiation film glass so that the product has low radiance and good selectivity coefficient Lsg; the indoor and outdoor colors of the glass are close to neutral color without interference colors; and the glass has excellent optical performance, various colors, weather resistance, and the like, and can be widely popularized and applied to vehicle glass and civil architecture glass.

This invention discloses an Excitation Emission Matrix (EEM) fluorescence spectrometer system that uses an LED array to cause excitation emission matrix fluorescence that is imaged onto a spectrograph for sample identification and analysis. By using the LED array, the spectrograph requires only high spectroscopic resolution of about 1 to 5 nm in the fluorescence emission range and low excitation light resolution of about 14 to 73 nm in the excitation range. While individual LED optical excitation spectra may contain wavelength regions that overlap, as long as the various LEDs have different excitation wavelengths and intensities, spectral overlap does not preclude data analysis. The invention provides an EEM spectroscopy system that is not a high resolution such as a laser or lamp based excitation system, but instead uses a lower resolution, lower power LED system. The invention also provides results that are comparable to existing systems with lower component cost and lower power requirements while also optically stable, small, and easy to use.

The invention relates to a method for preparing polyacrylate / nano-SiO2 compound coating agent which is suitable for bottom layer coating in clothing leathers and instep leathers, by using a reactive emulsifier. The polyacrylate has excellent optical stability, chemical resistance and favorable adhesive property and is widely used as an adhesive, a coating film-forming agent, a functional film, and a medical polymer and in the fields of water treatment and the like, but polyacrylate emulsion has the defects of embrittlement at low temperature, stickiness and strength loss at high temperature, easy after tack and the like, which restrict the application range and the use value of the polyacrylate emulsion. In the invention, the polyacrylate / nano-SiO2 compound coating agent is prepared by substituting conventional emulsifier with reactive emulsifier by utilizing the nanometer effect of an inorganic nanometer material and synchronously adopting a conventional emulsion polymerization method and a sol-gel method. The compound coating agent prepared by the invention has fine granules, excellent adhesive force, good filling capacity, strong water resistance and flexible and transparent formed film, and meanwhile, the damages to the human body and the environment, which are caused by the use of large amount of emulsifiers, are reduced.

A sensor that may be used to detect the presence, amount, and / or concentration of an analyte in a medium within an animal. The sensor may include a sensor housing, an indicator element embedded within and / or covering at least a portion of the sensor housing, and a membrane over the indicator element. The membrane may reduce indicator element deterioration by preventing immune cells, such as white blood cells, from contacting the indicator element, substantially prevent transmission of light of at least a specified wavelength or range of wavelengths through the membrane, and / or permit the analyte to pass through to the indicator element. The membrane may be an opaque diffusion membrane. The sensor may include a foil. The foil may block light and / or reduce indicator element deterioration. The membrane may reduce oxidation of the indicator element.

The invention relates to an ordered mesoporous silicon-dioxide-substrate fluorescence nanometer material and a preparing method thereof, which belong to the technical field of fluorescence nanometer materials of mesoporous molecular sieves. The ordered mesoporous silicon-dioxide-substrate fluorescence nanometer material is characterized by having the aperture size of 3 to 30 nm, the hole capacitance of higher than 0.5cm<3> / g<-1> and the specific area of larger than 500 m<2> / g<-1>, and the organic fluorescence molecules are grafted on the internal wall of the hole passage of the ordered mesoporous silicon-dioxide substrate in a mono-disperse and covalent way. The fluorescence material of the invention prepared by grafting the organic fluorescence functional groups on the ordered mesoporoussilicon-dioxide substrate in a mono-disperse and covalent way has high grafting rate (can be as high as 0.2 fluorescence functional group / nm<-2>), high fluorescence quantum rate (higher than 80 percent) and excellent optical stability.

The invention provides a ratio type fluorescent probe for distinguishing lipid droplets with different polarities. A chemical name is (E)-7-(N,N-diethylamino)-3-(3-(4-(diphenylamine)phenyl)acrylyl-2H-benzopyrone; N,N-diethylamino salicylic aldehyde reacts with ethyl acetoacetate to generate 3-acetyl-7-(diethylamino)coumarin; the product reacts with 4-(N,N-Diphenylamino)benzaldehyde (4) to obtain the fluorescent probe. The fluorescent probe has a two-photon property and an aggregation-induced light-emitting property; a whole body of the probe is electrically neutral and can be positioned in thelipid droplets with the different polarities very well. The probe has low toxicity, good optical stability and specific response on the polarities; detection on the polarities of the lipid droletps in organs and living bodies is realized. The invention further provides a synthesis method of the probe; the synthesis method has the advantages of simple steps, convenient for purification and high yield.

The invention discloses a preparation method of fluorescent complex microgel which is sensitive to temperature and pH. The method comprises the technical steps of preparing a mixed surface active agent, preparing the oil phase of a template, preparing an emulsive liquid, preparing a water phase, preparing N-isopropyl acryl amide copolymerized methacrylic acid microgel, preparing turgid N-isopropyl acryl amide copolymerized methacrylic acid microgel, preparing a mixed liquid of Gamma-aminopropyl triethoxy silane and normal heptane, preparing a silicon dioxide polymer complex microballoon decorated by a surface deposited amino group, preparing a mixed liquid of fluorescein isothiocyanate and absolute ethyl alcohol as well as preparing the fluorescent complex microgel. In the invention, the fluorescein isothiocyanate with high quantum yield and good optical stability is adopted as fluorescent matter; the prepared fluorescent complex microgel is sensitive to temperature and pH; and the size of the prepared fluorescent complex microgel is in a micron range and is hard to be aggregated. The method has the advantages of reasonable design, practical technique and easy operation; moreover, reactions are carried out under normal temperature and the like; the method can be applied to the fields of controlled release of medicament, biological probe, chemical separation, and the like.

There is provided a light-transmitting resin plate for a liquid crystal display which has achieved conversion of a linear light source into a surface light source together with a higher luminance by minimizing the loss of the transmitted light due to a light-diffusing agent and forming a specific semi-elliptic convex lens shape on the light-exiting surface side. There is also provided a light-transmitting resin plate which can satisfy a long-term optical stability of a backlight as well as shape stability of the resin plate.

The invention provides a preparation method for a quantum dot fluorescent imprinted polymer and belongs to the technical field of preparation of environment-friendly materials. The preparation method comprises the following steps: firstly, synthesizing a precursor sodium hydrogen telluride in a needle pipe; synthesizing a water-soluble CdTe quantum dot by using thiomalic acid as a protection agent; finally, synthesizing the quantum dot fluorescent imprinted polymer which takes cyhalothrin as a template molecule by using a reverse micro-emulsion method so as to optically detect the cyhalothrin. The prepared quantum dot fluorescent imprinted polymer has high optical stability and pH (Potential of Hydrogen) stability and has the capability of selectively identifying the cyhalothrin.

The invention pertains to liquid crystal material application and relevant fields, a method to prepare polymer dispersed liquid crystal (PDLC) film. 1,2-bipositive olefin butyl phenylacetylene compound, rigid double functional group acrylic acid ester polymerizable monomer and methyl metharcrylate are evenly mixed according to a mass ratio 8:2:3 to 8:3:2, and the mixture (taken as polymerized monomer of PDLC film) is evenly mixed with nematic liquid crystal according to a mass ratio 2:8 to 8:2, and a isotropic liquid is achieved. The isotropic liquid, photoinitiator and nano micro-beads are mixed evenly and laid between two transparent conducting films coated with ITO, and rolled evenly to form a membranous layer; the bright spots of isotropic liquid are irradiated with 365nm UV-lights under a temperature within 0.5 to 3 DEG C to achieve a PDLC film. The invention is capable to improve the driving voltage of PDLC materials, increase the mesh strength of polymers; as a result, the electro-optical stability of PDLC film is improved.

The present invention relates to a method of preparing heavy metal nanoparticles using a heavy metal-binding protein. More specifically, relates to a method for preparing heavy metal structures, comprising the steps of: culturing a microorganism transformed with a gene encoding a heavy metal-binding protein, in a heavy metal ion-containing medium, to produce heavy metal structures in the microorganism; and collecting the produced heavy metal structures, as well as nanoparticles of heavy metal structures prepared according to said method. Unlike prior methods of preparing quantum dots by physically binding metal materials, the quantum dots disclosed herein can be efficiently produced by expressing the heavy metal-binding protein in cells. In addition, the quantum dots are useful because they can solve an optical stability problem that is the shortcoming of organic fluorophores.

The invention relates to an ultrahigh-sensitivity fluorescent probe for detecting nitrogen monoxide. The ultrahigh-sensitivity fluorescent probe has the structural general formula in the original text. During preparation, firstly, 4-bromine-1, 8-anhydride naphthalene and o-nitro p-phenylenediamine with equal molar weights are used as raw materials, dissolved in ethylene glycol monomethyl ether and heated for reaction to obtain light yellow solid. Secondly, the light yellow solid is dissolved in anhydrous DMSO, primary amine is added into the anhydrous DMSO, the anhydrous DMSO is heated and refluxed, and reaction liquid is filtered in a sucking manner, depressurized and dried to obtain yellow solid. The yellow solid is dissolved in mixed liquid of tetrahydrofuran and methanol, and a yellow probe is obtained under catalysis of hydrogen and catalysts. Probe molecules have fine chemical and optical stability, good solubility and biological compatibility and high nitric oxide selectivity, and are free of interference of other active oxygen, active nitrogen and the like. Laser confocal imaging experiments indicate that the probe has fine cellular permeability, has no toxic and side effects on cells and organisms, and can be used for detecting protogenetic nitrogen monoxide in a high-sensitivity manner.

A heat-insulative paint against sunlight. It comprises: 7-15 parts of phenylpropionic acid emulsion, 4-8 parts of an adhesive of trimerized cyanamide modified polyvinyl alcohol, 2-20 parts of polyvinyl acetate, 3-7 parts of silicasol (liquid),0.3-0.8 part of carbamideíó0.8-1.0 part of glycolíó3-7 parts of white titanium pigmentíó12-18 parts of light calcium carbonateíó3-7 parts of calcite powderíó2-4 parts of expanded perliteíó18-22 parts of sepioliteíó1-3 parts talcum powderíó0.8-1.2 parts of gray calcium powder,1-2 parts of powdery silcate fiber ,0.3-0.8 part of alumen, 0.4-0. 6 part of penetrating agent T, 0.1-0.2 part of sodium carbonateíó appropriate amount of thickening agentíó18-26 parts of wateríó0-0.5 of dyes with high optical stability, 0-0.8 g jellebekite powder. The paint could reflect sunlight and insulate heat, has a bright surface.

The invention relates to temperable three-silver low radiation coated glass. The coated glass which comprises a glass body and a coating film is characterized in that: the glass body is a substrate; and the film structure of the coating film comprises, from inside to outside, a first dielectric combination layer, a first block protection layer, a first dielectric layer, a first silver layer, a second block protection layer, a first interval dielectric combination layer, a third block protection layer, a second dielectric layer, a second silver layer, a fourth block protection layer, a second interval dielectric combination layer, a fifth block protection layer, a third dielectric layer, a third silver layer, a sixth block protection layer and a second dielectric combination layer. The temperable three-silver low radiation coated glass disclosed in the invention adopts the unique film structure and a unique production technology, so a problem that middle and low radiation coated glass in the prior art cannot be well tempered is solved, and the coated glass which has the advantages of high visible light transmissivity, good photo-thermal ratio and optical stability, and good thermal insulation can satisfy various requirements of subsequent processing.

The invention provides a doped semiconductor nanocrystalline quantum dot having a core-shell structure and a preparation method thereof. The quantum dot comprises a nanocrystalline core doped with Mn and a shell layer; the composition of the nanocrystalline core is MnzZn[1-z]SexS[1-x], and the composition of the shell layer is ZnSeyS[1-y], wherein x is greater than 0 or less than or equal to 1, y is greater than or equal to 0 and less than 1 and z is greater than 0 or less than or equal to 0.5; the dimension of the nanocrystalline core is 2-15 nm, and the dimension of the shell layer is 2-15 nm; the emission wavelength of the nanocrystalline quantum dot ranges from 590 to 630 nm. The fluorescence emission wavelength of the quantum dots is continuously adjustable in the range from 590 to 630 nm; as a result, the quantum dots cover the shortage of non-cadmium-doped nanocrystalline in emission wavelength, and have high fluorescence and quantum efficiency, as well as good air, temperature and optical stability; the quantum dots are good in absorption in blue and purple zones and have no self-absorption within other visible light wavelengths; the quantum dots contain no toxic metal and can be widely applied to the fields such as solid-stable lighting, solar cell, biological-medical detection and the like.

The fluoroboric dye fluorescent probe for cell zinc ion detection operates on inner photoinduced electron transfer (PET) principle. The probe is prepared through connecting fluoroboric dye with 8-site chloromethyl group and bis(2-pyridyl methyl) amine simply. It has exciting wavelength and emitting wavelength in the visible light region, and has excellent chemical and optical stability. The probe series has very low pKa value of 2-3 normally, and has no effect on fluorescent emitting of pH in the range of 4-10. It has high selectivity on zinc ion without interference from Na, K, Ca, Mg, Mn and other metal ions, and can detect zinc ion concentration as low as nanomole level. The present invention has high quantum yield of probe molecule-zinc ion complex. Fluorescent microscopic imaging shows that the probe has high cell permeability and no toxic side effect on cell and is especially suitable for detection of intracellular zinc ion concentration.

Provided are quantum dots having a gradual composition gradient shell structure which have an improved luminous efficiency and optical stability, and a method of manufacturing the quantum dots in a short amount of time at low cost. In the method, the quantum dots can be manufactured in a short amount of time at low cost using a reactivity difference between semiconductor precursors, unlike in uneconomical and inefficient conventional methods where shells are formed after forming cores and performing cleaning and redispersion processes. Also, formation of the cores is followed by formation of shells having a composition gradient.

The invention relates to a preparation method of a polyacrylic ester / hollow silicon dioxide nanometer composite leather finishing agent. The polyacrylic ester is a kind of film forming matters most extensively applied in the leather finishing material, the polyacrylic ester has excellent optical stability, chemical resistance, extensibility and good cohesiveness, while the polyacrylic ester forms a layer of dense thin film on the leather surface to severely block the passage through which the water vapor emitted by a human body disperses to outside, so that the sanitary performance of a leather product is greatly affected. According to the invention, polystyrene microspheres are used as a template to prepare hollow silicon dioxide nanometer particles, and the hollow silicon dioxide nanometer particles are mixed with the polyacrylic ester to prepare the polyacrylic ester / hollow silicon dioxide nanometer composite leather finishing agent. Compared with the pure polyacrylic ester leather finishing agent, the composite leather finishing agent prepared by the preparation method has the advantages that the water vapor permeability is improved by 82.6%, the tensile strength is increased by 37.72% and the elongation at break is increased by 11.09%.

It is an object of the present invention to provide a polymerizable compound having a good liquid crystal property, a good alignment property, sufficient solubility in solvents, high preservation stability in a solution state, and high optical stability; a composition including the polymerizable compound; a polymer produced by polymerizing the polymerizable compound, such as a resin produced using the polymerizable compound; an optically anisotropic body including the polymer; and a liquid crystal display element and an organic EL device that include the optically anisotropic body. As a result of conducting intensive studies in order to achieve the above object, the compound represented by General Formula (I) is developed.

The invention discloses a donor-acceptor type fluorenyl nanometer grid material, a preparation method and application thereof. The nanometer grid material is of a square-ring-shaped rigid structure formed through alternative arrangement of fluorenyl ramification regarded as electron donor units and electron acceptor units. The preparation method comprises the following steps that a precursor with tertiary alcohol and aromatic nucleus terminal based hydrogen inhibitor dual binding sites is dissolved in organic solvent; at the room temperature, a catalyst is added, and stirring and reacting are conducted; and the reaction is conducted for 5 min-12 h, and products are obtained through chromatogram column separation. The donor-acceptor type fluorenyl nanometer grid material has the advantages that the compounding method is modularized, extensibility and stability of thermology, electrochemistry and photology are high; dependency of thin film solvent is reduced; large-area soluble processing is achieved; the size of apertures is accurately regulated and controlled; and accurate regulation an control of band gaps and energy level arrangement are achieved. The donor-acceptor type fluorenyl nanometer grid material has potential application prospects in the fields of photoelectric function materials of organic solar cells, storage and memory resistor, sensing, detecting and the like.

The invention relates to a fluorescent probe for detecting sulfur ions in mitochondria. The fluorescent probe is an RhS fluorescent probe, and the structural general formula of the RhS fluorescent probe is shown in the formula (I). The fluorescent probe can be rapidly positioned in the mitochondria and used for performing online real-time detection on the sulfur ions and hydrogen sulfide ions in the mitochondria. In addition, the probe also has relatively good chemical and optical stability, relatively good solubility and bio-compatibility and relatively high sulfur ion selectivity without interferences caused by other species such as reactive oxygen, reactive nitrogen and the like. Laser confocal imaging experiments show that the probe has relatively good cell permeability without causing toxic or side effects to cells and organisms.

The invention belongs to the technical field of organic electroluminescence material, in particular to a series of phosphorescent dye parent materials with a tetrahedral structure, and the application of the materials in an electroluminescent device. The phosphorescent dye parent materials can be used for a panel display device, a light-emitting diode (LED) and an electronic imaging device. The phosphorescent dye parent material has excellent electronic and hole transmission properties, can be independently used as a luminous layer and a current carrier transmission layer, and can be used as matrix and doped with other fluorescent or phosphorescent dyes. The compound has stronger fluorescent property in a state of solution or solid, can be used for forming an even film, and has better optical stability and thermal stability. R1, R2, R3 and R4 are respectively connected with phenyl group by a single bond, and are respectively selected from one of hydrogen, alkyl group, alkoxy, nitryl, hydroxyl, cyano-group, benzene cyano-group, amino, sulfydryl, halogen, diphenyl phosphoryl, furan, thiophene, pyrrole, pyridina, diazine, triazine, pyran, quinoline, benzpyrole, carbazole, aniline or phenothiazine, and X is C or Si.

An embodiment of the invention provides an array substrate and a manufacturing method thereof, and a display apparatus and relates to the display technology field. Stability of a thin film transistor in a pixel unit can be guaranteed and the size of the thin film transistor in a grid driving circuit can be reduced so as to realize a narrow frame design. The array substrate comprises the pixel unit and the grid driving circuit. The pixel unit comprises a first film transistor. The grid driving circuit comprises a second film transistor. An active layer of the first film transistor comprises a first metal oxide pattern and a second metal oxide pattern which are stacked. An active layer of the second film transistor is a third metal oxide pattern. Optical stability of the second metal oxide pattern is greater than optical stability of the first metal oxide pattern. Carrier mobilities of the first metal oxide pattern and the third metal oxide pattern are greater than a carrier mobility of the second metal oxide pattern. The display apparatus is used for the array substrate comprising the grid driving circuit and the pixel unit.

The invention relates to trapezoidal conjugated polymer and a method for preparing the same, belonging to the technical field of the organic chemical industry and the fine chemical industry. The trapezoidal conjugated polymer is effectively prepared by enabling raw material (single-linked polymer containing perylene diimide) to be subjected to the photocatalytic dehydrogenation cyclization reaction in organic solvent under the action of iodine of the catalytic amount, the solar radiation and the air condition at certain temperature. Compared with the raw material, the conjugation between trapezoidal conjugated polymer monomers is improved obviously, and the optical stability of the trapezoidal conjugated polymer is improved markedly.

The invention provides an immunoassay based on a carbon nanomaterial (carbon spot), comprising the following steps of: step A, preparing a carbon spot, and marking an immunoreagent antigen or antibody on a surface of the carbon spot so that the carbon spot becomes an immunoreagent-marked carbon spot; step B, mixing the immunoreagent-marked carbon spot, a sample to be tested and a solid phase substance coated by the immunoreagent antigen or antibody to complete immunoreactions, thus forming an immune complex, and separating the immune complex from a free immunoreagent; and step C, adding an oxidant to the immune complex for chemiluminescence detection, and / or directly enabling the immune complex to be subjected to fluorescence detection. According the immunoassay based on the carbon nanomaterial, the chemiluminescence detection and the fluorescence detection can be performed by using the carbon nanomaterial, and the optical stability is good.