64results about How to "Unique optical properties" patented technology

The invention discloses a safety film with a dynamic three-dimensional effect, which comprises a microlens array layer, a substrate layer and a micro graphic layer. The micro graphic layer comprises at least six micro-graphics; and when the safety film is used, the micro graphic layer is arranged near the focal plane of the microlens array layer. The safety film is characterized in that the central coordinates of each microlens in the microlens array layer are distributed at random in the microlens array layer, and the microlenses in the microlens array layer correspond to the micro-graphics in the micro graphic layer. Due the use of the Moore amplification technology and the microlenses, the invention realizes multiple unique visual effects, reduces the process flow, and can be directly manufactured on the PET, PMMA, PC and other organic film materials in addition to ultraviolet imprinting. Moreover, the safety film has high performance.

The invention relates to magnetic fluorescent microspheres and a preparation method thereof. The particle size of the magnetic fluorescent microspheres is 5-10 mu m, the fluorescence excitation wavelength range is 400-700nm, and the fluorescence intensity is not reduced within 24h. The prepration method comprises the following steps: adding a swelling agent into monodisperse carboxylated polystyrene microspheres, and adding magnetic nano microparticles into a swelling system; shaking on a decolorization shaker for 12-48h; using mixed solution of cyclohexane and ethanol for cleaning sediment, and sequentially carrying out ultrasonic dispersion and centrifugal separation till supernatant liquid is colorless under an ultraviolet lamp; and saving a final sediment product in 1ml of liquor. Compared with the existing magnetic fluorescent microspheres, the magnetic fluorescent microspheres have the advantages of uniform and controllable diameter, good fluorescence stability, simple preparation process, multiple types of fluorescence codes and the like, and can not only carry out fast separation and purification on reactants by being applied in the biological macromolecular detection, but also simultaneously detect a plurality of target molecules in a sample to be detected in a reaction tube and a hole, thereby being widely applied in the fields of immunoassay, nucleic acid hybridization, genotype analysis and the like.

The invention provides a method for preparing mesoporous silicon nanowire by metal nanoparticle auxiliary etching method, and belongs to the technical field of semiconductor materials. The method comprises the following steps: pretreating a silicon wafer; performing surface oxidation treatment; placing the treated silicon wafer in corrosive liquid; then soaking in nitrate solution; washing by using a large number of deionized water; and carrying out blow-drying by nitrogen to obtain the mesoporous silicon nanowire. Compared with the general compact silicon nanowire, the mesoporous silicon nanowire prepared by the method contains a large amount of holes with diameters of 2 to 50 nm, and the mesoporous silicon nanowire maintains a certain single crystal characteristic, so that the mesoporous silicon nanowirehas huger specific surface area and embodies unique optical and electrical properties, and the mesoporous silicon nanowire has great application prospect in the fields of nano sensors, optical devices, nano catalysis and the like.

The invention relates to a colloid photonic crystal printing method based on magnetic field orientation control, which can be used for printing a pattern with'orientation difference' by using a magnetic field to control photonic crystal orientation, rapidly fixing a photonic crystal structure in a selection area through ultraviolet curing, and repeatedly executing an orientation controlling-curing process for times. Compared with the prior art, according to the colloid photonic crystal printing method based on the magnetic field orientation control, a diffraction wavelength of photonic crystal, namely a color, is relative to orientation of a crystal structure, so that specific color distribution of the pattern is displayed in a condition that incident light is consistent to a viewing angle. A photonic crystal label is prepared by using two magnetic fields in mirror symmetry. When an angle of the incident light is switched between two orientations, colors of the pattern and a background can be exchanged. The label printed by a multi-orientation axial-symmetrical magnetic field can display a dynamic effect of moving glow when rotating under sunshine. Furthermore, the colloid photonic crystal printing method further can be used for manufacturing an invisible code with high transparency. Code blocks, which cannot be distinguished by naked eyes, can be accurately identified through a microscope or a spectrograph.

The invention discloses a method for generating vortex light with rotation angular momentum and a vortex light array with rotation angular momentum. On the basis of the shaping principle that a phase plate with rotation phase distribution is irradiated by a collimated light beam to generate a vortex light beam, the azimuth angle of a rotation phase and a proportional constant are multiplied, the rotation order of the rotation phase is in an ultrahigh level, and therefore the light which is similar to a line in light intensity distribution is generated in the observation (or imaging) plane perpendicular to the optical axis direction. Because the light is generated by the rotation phase and has rotation angular momentum, the light is called as the vortex light. The light beam can move particles on the observation plane perpendicular to the optical axis direction in a non-mechanical-moving mode. Multiple rotation phases modulated by blazed gratings are overlapped and distributed on the same phase plate, so that vortex light arrays arrayed in parallel are generated. The generated light beam has a unique optical characteristic, the generating method is simple and flexible, and the method can be used for the fields of optical tweezers technologies, light beam shaping and laser application.

The invention relates to a preparation method of an opal-structure polymer photonic crystal, and belongs to the technical field of colloid photonic crystal. The invention especially relates to a method for preparing the opal-structure polymer photonic crystal with a solvent evaporation self-assembly method by using mono-dispersed core-shell polymer microspheres. According to the invention, the mono-dispersed core-shell polymer microspheres are prepared with a soap-free emulsion polymerization method. Under normal temperature and normal pressure, the microsphere emulsion is coated on a flat-plate base. With the evaporation of water solvent, the microspheres are subjected to self-assembly, and the ordered opal-structure polymer photonic crystals are automatically grown.

The invention relates to a method for preparing lanthanide series-based NaYF4 up-conversion red, green and blue luminescence ink and a transparent anti-fake label. The method comprises the following steps: changing types of doping rare-earth ions, and preparing a rare-earth up-conversion material for generating red, green and blue luminescence colors with laser of 980nm; mixing up-conversion luminescence granules, ethanol and a polyacrylic resin, so as to obtain up-conversion luminescence ink. Compared with conventional luminescence ink, the up-conversion luminescence ink is excellent in florescence property, an ink formula is hard to copy, and the anti-fake property of a printed product is greatly improved. The method needs no product purification, is rapid and visible and is a novel luminescence ink preparation method which is simple and rapid to operate and high in yield. Based on a PET (Polyethylene Terephthalate) substrate, a series of transparent anti-fake labels are prepared from the red, green and blue up-conversion luminescence ink with conventional low-cost technique process spinning, silk screen printing and stamping, colored patterns can be displayed on the transparentlabels under excitation of laser of 980nm, and relatively good shielding performance and anti-fake performance are achieved.

The present invention relates to hollow bowl-shaped silicon dioxide nanoparticles, a preparation method and an application thereof. In particular, the present invention discloses the preparation method of the hollow bowl-shaped silicon dioxide nanoparticles. The method has the characteristics of being mild in preparation method, simple in operation, and meeting the demands of scale productions. The hollow bowl-shaped silicon dioxide nanoparticles have the novel hemispherical hollow recess structure, therefore have special physical properties (such as optical properties), and are expected to be used in the various application fields of film coating, gas sensing, catalysis, drugs, biology, etc.

The invention discloses an ultra-low density block-shaped fully stabilized zirconia gel and a preparing method thereof. Zirconium oxynitrate serves as precursors, yttrium nitrate or calcium nitrate and or magnesium nitrate serves as stabilizing agents, Y203:ZrO2=17-23%, CaO:ZrO2=10-20%, ZrO2=20%-30%, 1 and 2-epoxypropane serves as gel accelerant, and preparation utilizes epoxypropane distribution droplets. The density of aerogel is set between 0.03-0.12 g/cm<3>, porosity is set between 98% and 99.5%, the average pore size is 120-210 nm, and specific surface areas are 630-650 m<2>/g. The fully stabilized zirconia gel is of the amorphous phase structure before heat treatment, and when heat treatment achieves 800-1000 DEG C, the cubic phase is formed. The ultra-low density block-shaped fully stabilized zirconia gel is used for acoustic resistance coupling material, catalytic agents, catalytic agent carriers, high-efficiency heat-insulation material, preparation of high-efficiency charging batteries, and the like.

The invention discloses a simple, convenient, sensitive and general gene detecting method. According to the method, a target gene is detected by utilizing fluorescence signals produced through quantum dot doping; the concentration of the to-be-detected target gene and the mutation of single base in the target gene are detected through the fluorescence intensity. The method comprises the following steps of design of a deoxyribonucleic acid (DNA) probe, combination of the probe and metal ions, hybridization of the probe combined with the metal ions and the to-be-detected target gene, release of the metal ions, ion exchange reaction of quantum dot and the metal ions in the solution, obtaining of doped quantum dot, production of the specific fluorescence signals and detection. Compared with a traditional fluorescence probe detection method, the method has the advantages that the probe does not need any chemical labeling or modification and the whole process is only needed to be operated at room temperature; the method is high in detection sensitivity and the limit of detection can be up to the level of pmol per liter; the method is strong in specificity and the mutation of the single base in the gene can be distinguished; the method is generic and all gene sequences can be detected theoretically.

The invention discloses a gold nano-rod/polyethylene glycol/carbon dot nano-hybrid imaging contrast material which comprises polyethylene glycol, a gold nano-rod and a carbon dot. The gold nano-rod is connected to one end of the polyethylene glycol, the carbon dot is connected to the other end of the polyethylene glycol, the gold nano-rod is connected with the polyethylene glycol through a gold-sulfur coordination bond, and the carbon dot is connected with the polyethylene glycol through an amido bond. A preparation method of the gold nano-rod/polyethylene glycol/carbon dot nano-hybrid imaging contrast material is simple and controllable, and the unique optical property of the gold nano-rod is kept while water solubility of the gold nano-rod is enhanced. Besides, the material has the surface plasma resonance property of the gold nano-rod and the fluorescent property of the carbon dot. Diffuse reflection imaging can be realized by the aid of excellent optical reflection and scattering properties of the gold nano-rod, and fluorescent lifetime imaging is realized by the aid of the carbon dot, so that multi-modal imaging is realized.

The invention belongs to the technical field of conductive thin films and particularly relates to a preparation method of a spectrum selective ITO thin film for automotive glass. The preparation method of the ITO thin film comprises the following steps of cleaning a PET substrate; making preparation before preparing the spectrum selective ITO thin film; and preparing the spectrum selective ITO thin film through a room temperature magnetron sputtering method. The spectrum selective ITO thin film prepared through the method can reduce the reflectivity and improve the transmissivity at the visible light long waveband and is good in visibility. At infrared light waveband, the spectrum selective ITO thin film improves the reflectivity and blocks heat transfer.

The invention discloses a difunctional nanoprobe based on lanthanide metal as well as a preparation method and an application of the difunctional nanoprobe. The preparation method of the difunctional nanoprobe based on the lanthanide metal comprises steps as follows: 1), polypeptides containing DEVD amino acid residues are taken as a bridging agent and firstly react with antenna molecules BCTOT (10-bis(5'-chlorosulfo-thiophene-2' -yl)-4,4,5,5,6,6,7,7-octafluorodecane-1,3,8,10-tetraone), and BCTOT modified polypeptides are obtained; 2), the BCTOT modified polypeptides have a chelation reaction with lanthanide metal ions, and a chelated polypeptide solution is obtained; 3), the chelated polypeptide solution reacts with a nanomaterial solution, and the difunctional nanoprobe based on the lanthanide metal is obtained. The difunctional nanoprobe based on the lanthanide metal is applied to caspase-3 spectrum detection, mass spectrometric detection, cell imaging and/or ICP-MS (inductively coupled plasma mass spectrometry) quantitative detection. Dynamic visualization of biomolecule sites and high-sensitivity quantitative analysis can be achieved.

The invention, which belongs to the technical field of light sensing, relates to a novel D type microstructure-based optical fiber sensor and a preparation method thereof. On the basis of a D type LMRmicrostructured fiber, a D type LMR microstructured fiber beyond the diameter, formed by using a fiber core as a circle center, of an LMR microstructured fiber is removed to keep a complete fiber core. The D type LMR microstructured fiber comprises a fiber core, a semi-circular cladding and air holes being disposed between the fiber core and the cladding. The fire core and boundary isolation layers that are arranged at the two sides of the fiber core and are spaced by the air holes form a smooth plane; a a TiO2 film layer is plated on the plane; and the TiO2 film layer is plated with a HfO2 film layer. With increasing of the percentage contributed by the HfO2 thickness, the sensitivity rises to be much higher than a value obtained by a single TiO2 film, so that the stability and sensitivity of the sensing are improved effectively. Therefore, problems of difficult uniform film plating and low sensitivity in the microstructured fiber in the prior art are solved. The fiber sensor havinga simple structure and being easy to implement can be promoted widely in fields like the microstructured fiber.

The invention discloses a visual detection method for aflatoxin B1. The visual detection method comprises the following steps: respectively linking sulfhydrylated aflatoxin B1 aptamer DNA1 and a complementary chain DNA2 of a sulfhydrylated aptamer to 13nm+/-2nm nanogold, so to obtain an aptamer-nanogold probe and a complementary chain-nanogold probe, and carrying out detection by virtue of a competition method, wherein a drone is bonded with the aptamer when a to-be-detected object contains the drone, the aptamer-nanogold probe and the complementary chain-nanogold probe are in a free state, nanogold is easily gathered under a high salt concentration condition, the color of the nanogold is changed from red to blue, when the to-be-detected object does not contain the drone, the nanogold is not gathered under the high salt concentration condition, and the color of the nanogold is still red and is gradually changed from red to blue along the increase of the concentration of the drone; anddetecting an ultraviolet-visible spectrum of the solution at 200nm-800nm, so as to realize the quantitative detection of aflatoxin B1 in the to-be-detected object.

The present invention discloses an invisible fluorescent anti-counterfeiting method and an anti-counterfeiting marker, moire pattern encryption information is embedded into a color separation channelof a fluorescent color image, the formed invisible image only shows a full-color effect under the excitation of a special light source, and coded information hidden in a specific position of the colorimage is recognized through filtering color separation and expert unlocking. According to the invisible fluorescent anti-counterfeiting method based on Moire pattern encryption, multi-dimensional information coding in an invisible image is achieved, the invisibility is good, a decoded pattern is clear, the invisible fluorescent anti-counterfeiting method and the anti-counterfeiting marker have the advantages of being low in cost, difficult to forge, easy to popularize and the like, the anti-counterfeiting marker is suitable for batch production, and the product is endowed with the multiple anti-counterfeiting functions of two-line anti-counterfeiting and three-line anti-counterfeiting.

The invention discloses a preparation process of eyesight protection paper, which adopts a mixture of waste paper and straws as a raw material and comprises the following specific steps: a, cutting the straws into sheets, removing impurities and dehydrating; b, putting the straws into a solvent and mixing; c, cooking and removing impurities to obtain straw unbleached pulp; d, crushing waste paper and adding hot water to prepare paper pulp; e, performing deinking treatment on the paper pulp in the step d to obtain waste paper pulp; f, uniformly mixing the straw unbleached pulp, the waste paper pulp and a porous filler to form mixed pulp; g, subjecting the mixed slurry to hot grinding dissociation, and taking one part of the ground slurry as a surface slurry; h, adding a light absorbing filler into the rest of the ground slurry, carrying out hot grinding dissociation again, and taking the ground slurry as a core layer slurry; i, manufacturing the eyesight protection paper through a papermaking machine, wherein the eyesight protection paper is formed by compounding an upper layer, a middle layer and a lower layer, the outer paper faces of the upper layer and the lower layer are made of surface slurry, and the middle light absorption layer is made of the core layer slurry. The preparation process is environment-friendly, resources are saved, and the prepared paper can protect eyesight.

The invention relates to an addition-typed crosslinked sulfide poly disiloxane elastomer. The addition-typed crosslinked sulfide poly disiloxane elastomer is made from that poly disiloxane (for short) in which a main chain comprises repeated units of silicon and silicon oxide and a side chain comprises silicon-hydrogen bond and alkyl group or the blends thereof and polysiloxane of which side chain comprises silicon-hydrogen bond and alkyl group, under the effect of the catalyst, are crosslinked and vulcanized with crosslinking agent with over two unsaturated alkyls or vinyl-containing polysiloxane under normal or medium temperature. The proportion of each ingredient is that 1-100 weight potions of the poly disiloxane, 0-99 weight portions of the polysiloxane the side chain of which comprises silicon-hydrogen bond and alkyl group, 5-40 weight portions of the crosslinking agent or the vinyl-containing polysiloxane and 0.001- 0.005 weight portions of the catalyst. The addition-type crosslinked sulfide poly disiloxane elastomer has the advantages of good light transmittance, good thermal stability, and good processability such as easy film molding and casting molding and good mechanical property as well. The addition-type crosslinked sulfide poly disiloxane elastomer has wild application prospect in such fields as ceramic precursor, photo-induced etching material, semiconductor material, nonlinear optical material, photorefractive material and hole transport material, etc.