98results about How to "Optically stable" patented technology

The invention relates to yellow fluorescence carbon dots with high quantum yield. A preparation method of the yellow fluorescence carbon dots is characterized by comprising the following steps: dissolving organic acid and organic amine in water; performing microwave radiation after fully mixing the organic acid and the organic amine, thus obtaining a brown solid crude product; performing reverse-phase silica gel column chromatography purification by taking a mixed solution of the water and methyl alcohol as an eluting agent, thus obtaining the yellow fluorescence carbon dots. The yellow fluorescence carbon dots are characterized in that the average grain diameter is 3.0 to 4.0 nm; bright yellow fluorescent light can be emitted under the irradiation of an ultraviolet lamp, the excitation wavelength is 400 to 420 nm, the emission wavelength is 510 to 550 nm, the luminescent property of solids is shown, and the quantum yield can reach 44 percent. The yellow fluorescence carbon dots prepared by the invention are good in water solubility and stable in fluorescence signals, are suitable for cell imaging under physiological conditions, have a function of nuclear staining and can be widely applied to the fields of analysis and detection, biochemical sensing, biological imaging, biological marking and the like.

The invention discloses fluorescent carbon quantum dots as well as a preparation method and an application thereof. The preparation method of the carbon quantum dots comprises the steps of adding secondary water into malic acid (or malic acid and ethanol amine, or malic acid and ethane sulfonic acid), which serves as a raw material, carrying out ultrasonic treatment so as to obtain a clarified solution, putting the clarified solution into a microwave oven, reacting for 5-20 minutes so as to obtain solid, dissolving, filtrating, and dialyzing, so as to obtain undoped (or nitrogen-doped, or sulfur-doped) water-soluble fluorescent carbon quantum dots. The preparation process of the carbon quantum dots disclosed by the invention is simple, and the prepared carbon quantum dots are stable in optical property and good in biocompatibility. The carbon quantum dots disclosed by the invention can be applied to the fields of the analysis and detection on Fe<3+> in water, the biological imaging of living cells, fluorescent ink and the like.

A fluorescent microsphere for treating tumor and biomedical marking is prepared from near-infrared fluorescent substance, magnetic nanoparticles, gold nanoparticles, anticancer medicine and high-molecular material through spray drying to include the first four components in the high-molecular microsphere, and linking the biologic moleculae with recognizing function to the surface of microsphere.

A hydroxy apatite marked by the nanoparticles of near-infrared fluorescent quantum point for researching the growth of bone and diagnosing and treating the diseases, such as coronary sclerosis, bone cancer, etc is prepared by linking the nanoparticles of near-infrared fluorescent quantum point with the hydroxy opatite via adsorption, ion exchange, or covalent bonding.

The invention discloses a fluorescent carbon quantum dot and a preparation method and application thereof. The preparation method of the carbon quantum dot is as follows: taking glucose and asparagine as raw materials, adding a sodium hydroxide aqueous solution, carrying out ultrasonic treatment to obtain a clarified solution, heating to 200 DEG C by an oil bath to react for 30 minutes to obtain solids, and dissolving, filtering and dialyzing to obtain a nitrogen-doped water-soluble fluorescent carbon quantum dot. The preparation process of the carbon quantum dot in the invention is simple, and the prepared carbon quantum dot is stable in optical properties and good in biological compatibility. The carbon quantum dot in the invention can be used for analyzing and detecting Fe<3+> and S<2->, and can also be used in the fields of living cell biological imaging and the like.

The technological scheme of fiber coherent chromatographic imaging is that an adaptive optical path regulator is set in the parallel optical path of fiber collimator in either reference arm or measurement arm of optical coherent chromatographic imaging system. The regulator has a movable cubic prism or cat's eye system for optical path regulation. The cubic prism or cat's eye ystem has its reflected light always parallel to its incident light, so that its miniature swinging during translation has no any influence on the subsequent optical system and this reach the aim of adaptive optical pathregulation.

The invention discloses a surface decorative silica nanometer particle with cadmium telluride, which comprises the following steps: adopting quantum point of cadmium telluride as base; utilizing ligand exchange and siloxane hydrolyzing method to obtain the silica / cadmium telluride nanometer particle as core-case structure through one-step reaction; bonding aromatic cup hydrocarbons on the surface of particle through gel-sol method with stable nanometer, optical and high fluorescent strength.

The invention discloses a preparation method for an efficient crystal silicon passivated emitter rear contact (PERC) solar cell. The production method comprises the steps of providing a silicon wafer, and forming a textured surface on the front surface of the silicon wafer; forming a phosphorus diffusion layer on the front surface of the silicon wafer, and then removing PSG and peripheral phosphorus diffusion layer on the front surface of the silicon wafer; forming an SiNx antireflection layer on the front surface of the silicon wafer; forming an AlOx passivation layer on the back surface of the silicon wafer; forming an SiNx protection layer on the back surface of the silicon wafer; windowing the silicon wafer by a laser, wherein the laser windowing process is completed in two times; and implementing silk-screen printing on the silicon wafer. Correspondingly, the invention also provides the efficient crystal silicon PERC solar cell, which is prepared by using the preparation method provided by the invention. The preparation method provided by the invention is simple in technology and low in cost, and the acquired crystal silicon PERC solar cell is high in efficiency and good in appearance.

The invention provides a dual-emission fluorescent carbon dot and a preparing method and application thereof. The preparing method of the carbon dot includes the steps that 1) a certain mass of spinach-liquid solid powder is weighed and dissolved in secondary water, then ethanediamine is added into a solution, the mixture is fully stirred, ultrasound is conducted, a clear solution is obtained, andthe mass ratio of the spinach-liquid solid powder to the secondary water to the ethanediamine is (5-20):100:(8-10) ; 2) the solution is transferred in a hydrothermal reaction kettle, and reacts for 8h at the temperature of 120 DEG C; 3) the reaction kettle is taken out, naturally cooled and filtered, insoluble substances are removed, a clear solution is obtained, through a dialysis bag of 500 Dato 1,000 Da, dialysis treatment is conducted in a glass container, water is replaced one time every 4 hours, and a pure carbon-dot water solution is obtained; 4) the water solution is frozen and dried, and then the target carbon dot is obtained. The preparing method is simple, sources of raw materials are wide, and the carbon dot obtained with the method is stable in optical property and good inbiocompatibility, can be used for ratio-fluorescence continuous detection Pb2+ and PPi, and can also be used for paper sensing detection Pb2+ and PPi.

The invention relates to a method for preparing solid room-temperature phosphorescent carbon dots by a one-pot process. The method comprises the steps of subjecting benzenediboronic acid and saccharose, which serve as raw materials, to a reaction for 2 to 8 hours at the temperature of 120 DEG C to 180 DEG C by taking water as a solvent on the basis of a hydrothermal method, and carrying out purification and freeze drying, thereby obtaining the solid room-temperature phosphorescent carbon dots. The method is easy and feasible, is readily available in raw material, is free of low-temperature andoxygen-free environments, is free of any matrix addition and has a potential application value in the fields of anti-counterfeiting, information ciphering, optical devices and the like.

The invention discloses a manufacturing method of making sulfonating calixarene modify on the surface of nano silver to obtain the nano silver sol. The specific procedures are that: firstly, silver nitrate solution and sulfonating calixarene solution with same value and same viscosity are prepared, then the solution are added in secondary distilled water, sodium borohydride is added after mixing, and the nano silver sol modified by sulfonating calixarene is obtained through continuous mixing. With simple technics, the invention synthesizes the nano silver sol modified by sulfonating calixarene, wherein, nano silver sol modified by sulfonating [4] calixarene can conduct color comparison testing to isocarbophos, with higher selectivity and sensitivity, which not only has low cost, but also the reaction is quick and sensitive. The testing limit can reach 10 <-7> mol / L and can realize on-site testing. Besides, the preparation technics are simple and easy to practice, and the operability is strong; the common laboratory has condition to finish, thus having wide application prospect.

The thermostable optical film mixed with stabilizing zircite features in the magnetic control reaction sputter or free auxiliary sputter, with Y and Zr mole ratio being 10-50:100 or Al and Zr 3. 5-9:10 formed mixed target material as the source for sputtering, getting the multi layer film stacked alternatively by stabilizing zircite high refraction rate and non crystalisation SiO2, with the zircite being stabilizer ZrO2 with Al2O3 or zircite mixed with Y203, if the mixed content is Y203, the mole ratio of it with ZrO2 would be 5-25:100, if Al203, then its mole ratio with ZrO2 would be 1. 7-4. 5:10.It can be used as optical film filter, thin film outside the bulb filtering infrared, or thin film component for optical measurement under 500-1000DEG C.

The invention relates to anti-bio-sorption surface-modified fluorescent quantum dot / silica composite microspheres, a preparation method thereof, and an application thereof. The method provided by the invention is characterized in that: fluorescent quantum dot / silica composite microspheres are first prepared with a reverse micro-emulsion method, and then biocompatible molecules and active functional groups are modified on the surfaces of the microspheres. The method is characterized by simple technology and convenient operation. The surface-modified fluorescent quantum dot / silica composite microspheres can overcome nonspecific interactions thereof upon biological molecules and cells, and can realize covalent coupling thereof with biological molecules. Therefore, surface-bio-functionalized molecular fluorescent probes are constructed. The fluorescent probes can be further applied in fields such as cell biology, bacteria detection, biological macromolecule detection, and immunofluorescence analysis.

The invention provides a novel preparation method for ternary alloy type CdSeS quantum dots, which includes the following steps: mixing long-chain fatty acid cadmium with long-chain trialkylamine to obtain a precursor solution A; mixing trialkyl phosphine selenium, trialkyl phosphorus sulfide and trialkyl phosphine oxide to obtain a solution B, injecting the solution B in the precursor solution A for reaction, so as to obtain a CdSeS quantum dot solution C, removing non-reacted reactants, impurities and the long-chain trialkylamine as a solvent, and obtaining CdSeS quantum dot powder. The novel preparation method has the benefits that the preparation technology is simple, good safety, stability and repeatability are realized, the cost is low, high-quality quantum dots can be prepared in a large-scale manner; the optical property of the prepared quantum dots is stable, the spectroscopic property is excellent, the photoluminescence spectra are continuous and adjustable; the chemical reaction of the preparation method is limited in one container, the operation is simple, precise control of the reaction conditions is easier, and proprieties of products in batch production are more stable.

The invention discloses a yellow fluorescence carbon dot, a preparation method of the yellow fluorescence carbon dot, and an application of the yellow fluorescence carbon dot to label-free detection of quinolone antibiotics. The carbon dot is a yellow fluorescence carbon dot taking o-phenylenediamine and aminobutyric acid as the raw materials and prepared through a one-step hydro-thermal synthesismethod. The preparation method of the carbon dot is simple and convenient, and the prepared carbon dot is stable in optical property and good in water solubility and dispersity. The carbon dot, as afluorescence probe, is used to rapidly sensitively detect the quinolone antibiotics without label due to the special surface structure. When the quinolone antibiotics exist, the fluorescence of the carbon dot is effectively quenched by the quinolone antibiotics, and the content of the quinolone antibiotics in a sample is detected according to the variation degree of the fluorescence. Compared withthe traditional method, the provided quinolone antibiotics detection method is simple, convenient and fast, no label is extraordinarily modified, the sample is directly detected, and the method has more advantages in the practical application.

The invention relates to a magnetic fluorescent coding microsphere and a preparation method thereof. Firstly, during magnetic particle synthesis, medium-chain and short-chain fatty acids are used formodifying the surfaces of magnetic nanoparticles, so that the polarity of the surfaces of the magnetic nanoparticles is increased, the magnetic nanoparticles can be uniformly dispersed in a good solvent, and the particle size is more uniform; then, a two-step swelling method is adopted, which comprises the following steps: firstly, enabling magnetic nanoparticles to enter swelled polymer microspheres; enabling the fluorescent dye to enter the swollen polymer microspheres to form a 'magnetic particle core-fluorescent shell layer' structure, and reducing quenching and shielding effects of the magnetic particles on fluorescence to the greatest extent; then, by utilizing the swelling fading effect of the microspheres in a poor solvent, sealing cracks generated on the surfaces of the microspheres due to the swelling effect, avoiding leakage of magnetic nanoparticles and fluorescent dyes, greatly simplifying the sealing process, and obtaining the magnetic fluorescent coding microspheres withgood microsphere particle uniformity, good magnetic performance and good fluorescent performance.

The invention discloses a method for rapidly preparing nano silver with long-time stability and good monodisperse property, and provides a method for preparing nano silver with adjustable size, uniform grain particle and good monodisperse property. The method comprises the following steps: taking two silver needles with the diameter being 2-4mm, and the length being 80-100mm as an electrode, and adopting polyvinyl alcohol solution with the concentration being 5-15g / L, and the volume being 200mL as electrolyte, thus preparing the nano silver with uniform size, wherein the control voltage is 15-30V, and the galvanizing time is 2-10minutes. The nano silver prepared by the method has the advantages of being rapid and simple, high in safety, adjustable in size, long in stable time, being stored without shading and closing, and easy to film after being dried, and realizing the large-scale preparation.

The invention provides a multifunctional switch-type fluorescent carbon quantum dot and a preparation method and an application thereof, which belong to the technical field of preparation of a fluorescent probe. The preparation of the carbon quantum dot comprises the following steps: taking tartaric acid, citric acid and urea in deionized water, stirring the materials, and performing ultrasonic treatment to a clarified state; placing the above solution in a microwave oven, reacting the materials at a power of 200 to 500 W for 5-15 minutes, and then taking the material out to obtain a dark brown solid; dissolving the dark brown solid in deionized water, then performing centrifugation and filtering to obtain brownish black liquid, and performing freeze drying to obtain carbon quantum dots. The carbon quantum dot of the invention has the advantages of low preparation cost, simple process, short reaction time, energy saving and environmental protection. The obtained carbon quantum dots canbe used as a switching-type fluorescence sensor for quantitative detection of Cr(VI) ions and ascorbic acid, and have the advantages of stable optical properties and high fluorescence quantum yield,and low cytotoxicity and good biocompatibility expands the application potential for cell imaging.

The invention discloses a preparation method of a Cu-Mn double-doping ZnS quantum dot solution and application. Firstly, Mn-doped ZnS nanometer crystals are obtained in the nucleation doping process, i.e., Mn precursors and Zn precursors are mixed and are added into S precursors; after the reaction for a period of time, Cu precursors are added; the reaction temperature is controlled, so that the crystals continuously grow; therefore Cu-Mn double-doping ZnS quantum dots are obtained. The prepared double-doping quantum dots simultaneously have Cu and Mn doping fluorescence emission peaks; in addition, the Cu doping fluorescence emission peak is sensitive to the environment and can be used as recognition signals; the Mn doping fluorescence emission peak is used as a reference signal. Therefore the obtained Cu-Mn double-doping ZnS quantum dots can be used as ratio fluorescent probes for analysis and detection. The preparation method disclosed by the invention has the advantages that the preparation method is simple; a green effect is achieved; the repeatability is good; the prepared double-doping ZnS quantum dots have good water solubility; the fluorescence is adjustable.

The methods and compositions of the present invention generally relate to ophthalmic solutions. Specifically, the methods and compositions relate to at least the following: ophthalmic solutions that are usable as eye drops for contact lens wearers, eye rinsing solutions, and ophthalmic solutions that are usable as contact lens wetting agents. In a wetting solution aspect, the present invention provides a contact lens wetting solution that includes: a cesium salt, a rubidium salt or a combination thereof; and, water, wherein the wetting solution has a viscosity of 1 to 3 cps.

The invention relates to a synthesis method of a fluorescent molecular probe for detecting chlorine ions and application of the probe in detecting the chlorine ions in various actual water samples. The probe (N-ethylamino-6-methoxyquinoline) is synthesized by using a simple and low-cost method, and the probe is stable in property, high in specificity and sensitivity, short in response time, easy to prepare, low in cost and low in detection limit for measuring chlorine ions. By using the probe to detect content of chlorine ions in actual water samples, chlorine ion content in the actual water samples can be measured through fluorescence spectroscopy, and acquired results are slightly different from those acquired by a standard measuring method, so that N-ethylamino-6-methoxyquinoline has capability of quickly and conveniently detecting chlorine ions.

The invention provides a simple and green preparation method for monodisperse core-shell-structured C-dots@SiO2 fluorescence imaging nanoprobe. The method comprises the following steps: synthesizing a carbon quantum dot (C-dots) fluorescent nano-material with a uniform size, good dispersibility and high quantum efficiency by using a microwave method; and then coating C-dots in an ethanol-water system with ethyl orthosilicate (TEOS) as a silicon source so as to form C-dots@SiO2 nanoprobe suitable for biological imaging. Due to coating of SiO2, the prepared nanoprobe is easy to separate and wash and has stable physicochemical properties and optical properties, good biocompatibility and friendliness to the environment; moreover, surface modification of the nanoprobe can be easily carried out; and the nanoprobe is applicable to other biomedical clinical application fields, e.g., targeting imaging of cancer cells.

The invention discloses a modified magnetic nanoparticle, a preparation method thereof, a non-polar solvent-based magnetic liquid, and a preparation method and an application of the magnetic liquid. The preparation method of the modified magnetic nanoparticle comprises the following steps: preparing a Fe3O4 magnetic nanoparticle; carrying out a sol-gel reaction on the Fe3O4 magnetic nanoparticle and a silicon source to obtain a silica-coated magnetic nanoparticle, mixing the silica-coated magnetic nanoparticle with ethanol and ammonia water, and uniformly stirring under a 20-75 DEG C water bath condition to obtain a magnetic mixed solution; and adding a modifying solution into the magnetic mixed solution at a certain speed, and carrying out a modification reaction. The modified magnetic nanoparticle is uniform in particle size and morphology distribution and controllable in particle size, has good dispersity in polar solvents and non-polar solvents, can form a photonic crystal structure, has good magnetic properties, optical properties and chemical stability, can be used for preparing photonic crystals, electronic paper and the like, and has a huge application prospect in the fields of electronics, optics, chemical engineering and the like.

The invention discloses a method for quantitatively detecting alanine transaminase in a solution based on a copper nanocluster fluorescent probe, wherein a copper nanocluster with glutathione as a protective agent is used as a fluorescent probe, and the content of alanine transaminase in the solution is specifically detected through a fluorescence "off-on" mode. The label-free, highly sensitive and selective detection of alanine transaminase is achieved by adopting the fluorescence "off-on" mode. The method is simple and rapid, the specific detection of alanine transaminase can be realized, the detection linear range is wide, and the detection limit is low. The method in the invention has good detection sensitivity and selectivity and has good application prospects in disease detection, clinical application and other aspects.

The invention discloses a preparation method of a nano-apatite / biopolymer composite stent with fluorescence labeling property. The method comprises the following steps: preparing rare-earth doped nano-apatite sol, and performing post-treatment; and preparing a nano-apatite / biopolymer stent to obtain the nano-apatite / biopolymer composite stent with fluorescence labeling property. The stent has the advantages that the apatite particles have excellent dispersion in biopolymer matrix, and the stent has a light labeling property with optical stability and excellent luminescence performance, so that the problem that a conventional stent material difficultly performs effective detection, diagnosis and the like of in-vitro and in-vivo tests can be solved. The method has easiness in process and convenience for operation, and is easy for popularization and application.

The invention discloses a near-infrared fluorescent magnetic Fe NCs dual-mode probe as well as a synthesis method and an application thereof. The valence state of an iron element in the magnetic Fe NCs dual-mode probe is zero, the particle size of the iron element is 5 nm, an iron nano-cluster prepared from glutathione serving as a stabilizer and iron ions in a molar ratio of 1: 0.3073 has excellent near-infrared fluorescence emission capacity, interference of biological autofluorescence in a sample can be effectively avoided, and the product can be used for high-sensitivity detection of the drug molecule tiopronin in a complex detection system. Besides, the probe also has relatively strong paramagnetic properties, can generate bright T1 weighted image signals under the action of an external magnetic field, is gradually enhanced along with the increase of the concentration of the probe, and also has a wide application prospect in the aspect of magnetic resonance imaging.

The invention discloses a method for quantitative detection of ultramicro-protein based on the principle of nano gold particle biomineralization, which comprises the following steps: firstly, by taking the first generation of PPIHA dendrimer and chloroauric acid (HAuCl4) as raw materials, preparing nano gold colloid with surface modified by amine by means of a microwave reflux heating method, andcombining the nano gold colloid with to-be-detected protein to form conjugate at a normal temperature; secondly, carrying out biomineralization on the nano gold-protein conjugate in a sodium citrate-chloroauric acid system; and then carrying out resonance scattering spectral analysis on the biomineralization product by using a fluorescence spectrum spectrograph. Because of the linear relation between the peak strength of the resonance scattering spectrum of the product at the characteristic wavelength and the protein concentration, the ultramicro-protein can be quantitatively detected. The method is easy and quick and has high sensitivity, high specificity and high accuracy. In addition, the method has a good portability and can be used for early tumor diagnosis, quick food safety detection, water quality monitoring and the like.

The invention provides a nitrogen-doped yellow fluorescent carbon quantum dot and a preparation method and application thereof, belonging to the technical field of detection of carbon quantum dots andmetal ions. The preparation method of the carbon quantum dot comprises the steps of putting glucose and aspartic acid in a beaker, adding a sodium hydroxide water solution, and stirring sufficientlyto obtain a clear solution; putting the beaker with the solution in oil bath, heating up to 150DEG C, and reacting for 30-40 minutes so as to obtain a solid; and naturally cooling and adding deionizedwater, stirring and dissolving to obtain a clear solution, dialyzing by a dialysis bag, so as to obtain a pure carbon quantum dot water solution, and freeze drying to obtain target carbon quantum dots. The prepared carbon quantum dots can be used in detection of cobalt ions, and also can be used in cell fluorescent imaging.

The invention discloses a PVA derivative radiation refrigeration film material as well as a preparation method and application thereof. The preparation method comprises the following steps: synthesizing a PVA derivative modified by alkyl chain side chains with different lengths from polyvinyl alcohol and fatty aldehyde, then dissolving the PVA derivative into a good solvent, and forming a PVA-Cn membrane through a phase separation method, namely the PVA derivative radiation refrigeration membrane material. The PVA derivative radiation refrigeration film material prepared by the invention has rich random micron-pore and nano-pore structures on the surface and inside, has high solar reflectivity and thermal emissivity, and has a good outdoor cooling effect, so that the PVA derivative radiation refrigeration film material can be used as a heat-insulating, solar-reflecting or infrared-transmitting material, and the material is used for radiation refrigeration, building energy conservation, food preservation, wearable products, mobile phones, automobiles, electronics and electric equipment.

The invention provides a nitrogen-sulfur self-doped fluorescent carbon quantum dot as well as a preparation method and application thereof. Methyl blue is used as a single precursor, ethyl alcohol isused as a solvent, after ultrasonic dissolution, a faint yellow solution is obtained through a high-temperature reaction; the ethyl alcohol solvent is removed through rotary evaporation, so that a viscous solid is obtained; water is added for dissolving the viscous solid; dialysis and purification are conducted in secondary water through a dialysis bag, so that a nitrogen-sulfur self-doped fluorescent carbon quantum dot aqueous solution is obtained. The preparation method disclosed by the invention is simple and low in cost; the self-doping of the prepared carbon quantum dot through in-situ carbonization of the precursor rich in nitrogen atoms and sulfur atoms is very necessary, and complex post-treatment procedures can be reduced. According to the prepared nitrogen-sulfur self-doped carbon quantum dot, the fluorescence quantum yield of the nitrogen-sulfur self-doped carbon quantum dot is up to 60%, the optical property of the nitrogen-sulfur self-doped carbon quantum dot is stable, and the biological toxicity of the nitrogen-sulfur self-doped carbon quantum dot is low. The carbon quantum dot disclosed by the invention can be used for detecting H2S in a water sample, blood or a redwine sample, can be used for cell imaging, intracellular H2S detection and zebra fish imaging, and can also be used in the field of fluorescence anti-counterfeiting.