Abstract: In a method of forming a light emissive nanostructure, a quantum dot is provided and a crosslinked-glutathione layer around the quantum dot is formed. The light emissive nanostructure thus comprises a quantum dot and a crosslinked-glutathione layer around the quantum dot. In another method, a metal-based nanostructure is provided, and a crosslinked-glutathione layer coated on a surface of the metal-based nanostructure is formed. The metal-based nanostructure is thus coated with a crosslinked-glutathione layer. To promote crosslinking and stability, the glutathione layer may be crosslinked in the presence of an activating agent and sufficient amount of free glutathione.

Abstract: In a fluorescer solution, a plurality of types of fluorescent particles are contained in a resin liquid. Average particle sizes of these fluorescent particles decrease as densities of the types increase. In other words, average settling rates vs of the types of the fluorescent particles ascertained by v s = D p 2 × ( ? p - ? f ) × g 18 × ? are equal to each other, where Dp is an average particle size of each of the types of fluorescent particles, pp is a density of each of the types of fluorescent particles, pf is a density of the resin liquid, ? is a viscosity of the resin liquid, g is the acceleration due to gravity, and vs is an average settling rate of each of the types of fluorescent particles.

Abstract: The present invention provides light-emitting diode (LED) devices comprises compositions and containers of hermetically sealed luminescent nanocrystals. The present invention also provides displays comprising the LED devices. Suitably, the LED devices are white light LED devices.

Abstract: A luminous material such as an aluminum luminous material of which particle size is 1 ?m to 7 ?m is added for 1.8 weight parts to 4.4 weight parts relative to 100 weight parts of a resin material such as, for example, an AES resin containing a copolymer. A molding is performed by using a resin composition generated as stated above, and thereby, a resin molded article having luminosity, a suppression effect of interference of scattered light, and associated physical properties can be obtained.

Abstract: A phosphor (photo-luminescent) material based authentication system in which a blend (mixture) of at least two, preferably three or more, phosphor materials are used as a photo-luminescent security marking which is applied to or incorporated within an article/document to be authenticated. Preferably, the phosphor materials are each excitable by “eye safe” excitation radiation comprising visible light of wavelength 380 nm to 780 nm. Moreover, when excited the security marking preferably also emits visible light thereby minimizing any risk of damage to an operator's eye in the event of accidental exposure to the excitation radiation and/or light generated by the photo-luminescent marking. The authenticity of the article/document can be authenticated by verification of the composition of the phosphor by exciting the marking and comparing one or more selected parameters of light emitted by the security marking with corresponding parameters of the characteristic emission spectrum of the authentic phosphor blend.

Abstract: An encapsulated luminescent particle for use in an aqueous environment includes a luminescent pigment capable of being illuminated by an external light source and an encapsulating material, wherein the encapsulated luminescent particles are between about 1.5 mm and about 5 mm in size. The encapsulating material permits luminescence from the luminescent pigment upon excitation by an external light source, such as, a blacklight, while allowing the luminescent pigment to be safely used in an aqueous environment, such as a pool, spa, or the like.

Abstract: A light-emitting apparatus composed of a light source that emits primary light and a phosphor that absorbs the primary light and emits secondary light offers high brightness, low power consumption, and a long lifetime while minimizing adverse effects on the environment. The phosphor is formed of a III-V group semiconductor in the form of fine-particle crystals each having a volume of 2 800 nm3 or less. The light emitted from the fine-particle crystals depends on their volume, and therefore giving the fine-particle crystals a predetermined volume distribution makes it possible to adjust the wavelength range of the secondary light.

Abstract: The present invention relates to nanoparticles having a hydrophilic surface coating, to methods of production thereof and to the use thereof in biological, molecular biological, biochemical and medical applications.

Abstract: The present invention is directed toward fluorescent inks and markers comprising carbon nanotubes. The present invention is also directed toward methods of making such inks and markers and to methods of using such inks and markers, especially for security applications (e.g., anti-counterfeiting). Such inks and markers rely on the unique fluorescent properties of semiconducting carbon nanotubes.

Abstract: Liquid phase suspensions of substantially monocrystalline rare-earth borate particles, the mean size thereof ranging from 100 to 400 nm, are prepared by roasting a rare earth borocarbonate or hydroxyborocarbonate at a temperature which is sufficient for forming a borate and obtaining a product whose specific surface area is equal to or greater than 3 m2/g and then wet grinding the roasted product; such borates are useful in the form of luminophors, in particular, as luminescent transparent materials.

Abstract: The present invention provides a light-emitting body in which fine phosphor particles are dispersed in an oxide matrix, with the fine phosphor particles containing at least one selected from oxides and oxysulfides as a parent material. When this light-emitting body is dispersed in a resin, a resin composition having excellent transparency can be obtained. This light-emitting body can be produced by: preparing a gel through a sol-gel process in which a raw material solution containing a compound that supplies metal atoms composing the fine phosphor particles is used; and heating the gel at 400° C. or higher, for example. Preferably, the light-emitting body has a shape of a flake or fiber.

Abstract: A semiconductor nanocrystal capable of emitting light with an improved photoluminescence quantum efficiency. The present invention further relates to compositions and devices including semiconductor nanocrystals capable of emitting light with an improved photoluminescence quantum efficiency. A semiconductor nanocrystal wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 50% upon excitation and including a maximum peak emission with a FWHM less than 20 nm is disclosed. Also disclosed are a device, a population of semiconductor nanocrystals, and a composition including a semiconductor nanocrystal wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 50% upon excitation and including a maximum peak emission with a FWHM less than 20 nm.

Abstract: In accordance with the present invention, there are provided metal oxide-based phosphor microfine particles comprising a matrix crystal made of a metal oxide and a metal element doped as an emission center into the matrix crystal, wherein the microfine particles are provided with an organic group coordinated to a surface thereof, have a small particle size as well as a high affinity to and a high dispersibility in light-transmittable resins, and are inhibited from scattering light emitted from a light source; a process for producing the metal oxide-based phosphor microfine particles; a dispersion of the metal oxide-based phosphor microfine particles; a fluorescent conversion film; a method of separating the metal oxide-based phosphor microfine particles; a fluorescent liquid; a fluorescent paste; a phosphor; a process for producing the phosphor; and a fluorescent converter.

Abstract: This invention discloses composite materials utilizing high refractive index materials and their use with phosphors, LED packaging and as fillers in polymers and in polymer blends.

Abstract: In one aspect, the invention relates to stable, luminescent, lanthanide-based nanoparticles and methods for making same. Thus, disclosed are lanthanide-based nanoparticles exhibiting a luminescence brightness of at least about 4%×(3×107 M?1 cm?1) with a particle diameter of less than about 100 nm; stable, luminescent nanoparticles with cores comprising at least one lanthanide chelate and a shell comprising organic silane residues; and processes for preparing a stable, luminescent nanoparticle, the process comprising the step of combining a basic protic solvent with a mixture of an alkylsilane and an aprotic solution of lanthanide chelate. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Abstract: Provided is a dispersant including a hydrophobic moiety with a branched alkyl group and an arylene group and a hydrophilic moiety with an alkylene oxide group and a carboxylic acid group. The alkyl group is a substituted or unsubstituted alkyl group of 5-30 carbon atoms, the arylene group is a substituted or unsubstituted arylene group of 6-30 carbon atoms, and the alkylene oxide group is a substituted or unsubstituted alkylene oxide group of 2-10 carbon atoms. The dispersant has good dispersibility, and a low residual carbon content after sintering. Thus, a paste composition including the dispersant can maintain a low viscosity and disperse many inorganic particles. Thus, an inorganic device prepared using the paste composition can have a low residual carbon content and a high packing density.

Abstract: Disclosed herein is a phosphor paste composition, which includes a phosphor, a dispersant, and a binder solution composed of a solvent and an organic binder, in which the dispersant includes iso-octylphenol ethoxylated phosphoric acid, phosphate ester of a block copolymer of nonylphenol and polyoxyethyleneglycol, or phosphate ester containing an acryl backbone. In addition, a display device using the phosphor paste composition is provided. The phosphor paste composition of this invention can be applied to various phosphor screens for display devices and to display devices, thus increasing high physical properties, including luminance, and greatly improving workability.

Abstract: A lamp or light tube that is both shatterproof and produces an after-glow effect. The light tube is comprised of a cylinder sealed by glass and metal end caps on each end of the glass-sealed cylinder, and electrical conducting pins extend from at least one of the metal end caps to connect the light tube to a power source. The glass-sealed cylinder is coated on its exterior with a shatterproof coating composition that emits an after-glow effect. The coating composition is comprised of a strontium aluminate after-glow phosphor, an ethylene acid copolymer resin, and an ultraviolet additive.

Abstract: Nanoparticles are functionalized for use as bio-imaging probes using a novel, modular approach. Particle surface modification is based on a phosphonate monolayer platform on which was built a multi-segmented, multi-functional film: the first segment provided hydrolytic stability, the second aqueous suspendability, and the third, selectivity for cell attachment. In vitro imaging experiments visualized nanoparticle—cell surface binding. Peptide-derivatized nano-particles were not displaced from cells by soluble peptide. Methods for coating the host particles and use of rare earth ion-doped particles in imaging methods and photodynamic therapy methods are also disclosed.

Abstract: A fluorescent material includes first and second phosphors. The first phosphor is a light-storing phosphor, which is represented by the general formula (M1-a-bEuaQb)Al2O4, wherein M is one type selected from the group consisting of Mg, Ca, Ba, Sr and Zn; Q is one type selected from the group consisting of Pr, Nd, Dy, Er and Ho; a is a number that satisfies 0.0001?a?0.5; and b is a number that satisfies 0.010?b?0.5. When the fluorescent material is excited for about 15 minutes by ultraviolet irradiation having about 365.0 nm wavelength with an intensity of 0.5 mW/cm2, and the color of the afterglow of the fluorescent material is measured 1 minute and 10 minutes after excitation is terminated, an amount of change between chromaticity measured 1 minute after excitation and that measured 10 minutes is in the range of ?0.001?x?0.009 and ?0.009?y?0.006.

Abstract: The present invention relates to a surface treatment method for nanoparticles. The present invention particularly relates to a surface treatment method for nanoparticles, which increases the dispersion ability of the nanoparticles in a solvent, and in which a mixture made of a polyvalent acid and a nitrogen-containing base, such as an amine, or a salt of a polyvalent acid and a nitrogen-containing base, such as ammonium salt, or also a corresponding betaine, is used. The present invention also relates to surface-modified nanoparticles, which can be obtained by the inventive method.

Abstract: The present invention relates to a display, more specifically, to an image display improving a hot spot and a viewing angle and solving problems caused by the chemical characteristic of materials, even if implementing a display by projection-type, and manufacturing method at the same. In order to this, the present invention provides an image display comprising of background materials and masterbatch achieving a performance of the display by mixing with the background materials; wherein the masterbatch comprises fluorescent pigments of red (R), green (G) and blue (B) implementing colors, a carbon black, a light diffuser and a UV stabilizer.

Abstract: Matrixes doped with semiconductor nanocrystals are provided. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. Processes for producing matrixes comprising semiconductor nanocrystals are also provided.

Abstract: A sulfide phosphor paste composition comprising a sulfur-containing dispersant, and a fluorescent film prepared therefrom, are provided. The sulfur-containing dispersant has a dual head structure containing both a carboxyl group and a thiol group or a structure containing a thiol or thiophene group as a head group. An oligomeric sulfur-containing dispersant is also provided. Adsorption of the dispersant on the surface of the sulfide phosphor prevents aggregation of the phosphor particles, and thereby improves the dispersibility of the sulfide phosphor paste composition, the homogeneity of the phosphor in the paste composition, and the density of a film produced from the paste composition. Fluorescent films and display devices produced from the phosphor paste composition exhibit improved luminescent properties and excellent processability.

Abstract: The invention is directed to quantum dot nanoparticles and methods of preparation. Using regioselective dendritic functionalized cellulose, quantum dots may be embedded in the modified cellulosic material. The quantum dot nanoparticles provide use for biotechnology or biomedicinal applications. Photooptical properties and morphology for use in as well as its biocompatibility were investigated.

Abstract: Dispersion of particles of at least one oxide of at least one luminescent rare earth, disaggregated and stabilized in a hydrophobic liquid medium containing at least one surfactant, in which the said surfactant is a non-ionic surfactant having an HLB (hydrophilic-to-lipophilic balance) lower than 12. Method for preparing the dispersion. Varnish comprising the said disaggregated, stabilized and dispersed particles, and its method of preparation. Method for making substrates with the said varnish and substrate thereby marked. Method for identifying objects provided with a marking using the said varnish.

Abstract: An optical based identification system that is easily deployable and can be used in broad daylight. Fluorescent semiconductor nanocrystals (quantum dots) that fluoresce at specific wavelengths are distributed in a suitable polymer. The resulting mixture can then be applied as paint or on an adhesive label for application to a portion of any equipment or member of a friendly unit. The system also has a corresponding detectional processing unit which may be mounted on ordnance or on any other equipment such as aircraft. The detection unit uses a laser, which when active, causes a laser beam to strike the paint or adhesive able applied to the friendly unit. This causes the quantum dots to fluoresce. The fluorescence of the quantum dots can be detected by the sensor portion of the detection/processing unit.

Abstract: Disclosed herein is a quantum dot ink composition for inkjet printing. The quantum dot ink composition comprises a highly viscous polymeric additive. Quantum dots can be ejected by inkjet printing and the concentration of the quantum dots in the quantum dot ink composition can be freely controlled. In addition, the loading amount of the quantum dots can be reduced. Based on these advantages, the quantum dot ink composition can be used as a material for light-emitting layers of a variety of electronic devices. Also disclosed herein is an electronic device fabricated using the quantum dot ink composition.

Abstract: The present invention provides nanoparticles having a core/shell structure consisting of a core comprising a Group III element and a Group V element at a molar ratio of the Group III element to the Group V element in the range of 1.25 to 3.0, and a shell comprising a Group II element and a Group VI element and having a thickness of 0.2 nm to 4 nm, the nanoparticles having a photoluminescence efficiency of 10% or more and a diameter of 2.5 to 10 nm; a method of producing the water-dispersible nanoparticles comprising bringing a dispersion of III-V semiconductor nanoparticles in an organic solvent into contact with an aqueous solution of a Group II element-containing compound and a Group VI element-containing compound to thereby transfer the III-V semiconductor nanoparticles of the organic solvent dispersion to the aqueous solution, and then irradiating the aqueous solution with light; and a method of producing a glass matrix having the nanoparticles dispersed therein.

Abstract: To provide a semiconductor device member that is superior in heat resistance, light resistance, film-formation capability and adhesion, and is capable of sealing a semiconductor device and holding a phosphor without causing cracks, peelings and colorings even after used for a long period of time, the weight loss at the time of heating, measured by a predetermined weight-loss at-the-time-of-heating measurement method, is 50 weight % or lower and the ratio of peeling, measured by a predetermined adhesion evaluation method, is 30% or lower, in the semiconductor device member.

Abstract: The present invention is related to a phosphor that can be excited by UV light between 375 to 400 nm to emit white light, which is intrinsically produced by emitting blue light with yellow light simultaneously. This compound is synthesized from organic amine, metal oxide and phosphate under hydrothermal conditions, and gives rise to a zeolitic structure with the chemical formula of (A)5-x/2[Zn9-xGaxO(HPO4)(PO4)8].yH2O (0<x<9, 0<y<15). On the other hand, when synthesized by different solvents, it is possible to obtain a phosphor of the same chemical formula and structure, but it can emit yellow light when excited by UV light or blue light emitted by LED between 300 to 500 nm.

Abstract: A compound material for white LED, including an inorganic phosphor, an inorganic light scatter and a polymer adhesive for interaction with a shortwave light radiated by an InGaN heterostructure. The light scatter is a nano-scale powder material formed of AIIBVI quantum dot compound in which A=Zn, Cd; B?O, S, Se, Te, and composed with (Y2-x-y-z GdxCeyDyzO3)1.5±?(Al2O3)2.5±? inorganic phosphor to form a compound material.

Abstract: Methods for authenticating an article with a cyanoacrylate solution comprising a water soluble security marker compound are described. The methods for producing a nucleophilic security marker/cyanoacrylate solution as well as methods for labeling an item and detecting the nucleophilic security marker/cyanoacrylate from an item being authenticated are also described. A method for using a nucleophilic cyanoacrylate security marker for antitheft purposes is also described.

Abstract: In one embodiment of the present invention, on the surface of a material to be measured for stress analysis which has a stress-induced luminescent material layer formed thereon, a distortion energy is disclosed which is transmitted from a base material of a stress-induced luminescent material to the stress-induced luminescent material with high efficiency. The material to be measured for stress analysis has, on the surface thereof, a coating film layer, which emits light upon exposure to a change in distortion energy. The coating film layer is formed of a synthetic resin layer containing stress-induced luminescent particles, and the modulus of elasticity of a base material is not less than 1.0 GPa. The thickness of the coating film layer is preferably 1 ?m to 500 ?m.

Abstract: The present invention relates to an red luminescent ink composition exhibiting adequate and stable emission intensity under irradiation of ultraviolet rays and high solubility for a resin and an organic solvent. The ink composition of the present invention contains a luminous compound represented by the following formula (1): wherein R is a perfluoroalkyl group having 2 to 20 carbons, L1 and L2 are the same or different and are sulfoxide having a substituted or unsubstituted aryl group or a substituted or unsubstituted an alkyl group.

Abstract: An epoxy resin composition for optical semiconductor element encapsulation includes an epoxy resin (Component (A)) mainly containing an epoxy compound represented by a specific structural formula (1), a curing agent (Component (B)), and at least one of an oxynitride phosphor and a nitride phosphor (Component (C)). Therefore, the phosphor component (C) is uniformly dispersed in the epoxy resin composition without segregation. Thus, the resin composition serves as an excellent optical semiconductor element encapsulation material which has an adequate light diffusion property and a high light transmittance and permits a reduction in internal stress. Therefore, a light emitting diode element encapsulated with the epoxy resin composition is capable of stably emitting light, and satisfactorily performs its functions.

Abstract: In one embodiment of the invention, a marine article of the invention includes a phosphorescent phosphor. A particularly advantageous phosphorescent phosphor comprises MAl2O4. As used herein, “M” is at least one cation selected from a group consisting of calcium, strontium, and barium. The phosphor comprises 0.001% to 10% of a europium activator, and 0.001% to 10% of at least one dopant selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, tin and bismuth as a co-activator, in terms of mol % relative to the metal element expressed by M. The phosphorescent marine article has an afterglow corresponding to a luminance of at least 0.3 mCd/m2 for at least 420 minutes.

Abstract: The invention relates to a process for the incorporation of volatile phosphors into the pore system of inverse opals by means of gas-phase infiltration, and to corresponding illuminants

Abstract: A method for obtaining a scintillation body comprising the steps of readying a matrix of binding material within which is present a plurality of scintillation crystals, obtaining a plurality of channels within the matrix and around the crystals and inserting metallic material having a high atomic number and high density between mutually adjacent scintillation crystals without separating the scintillation crystals from the matrix of binding material.

Abstract: The present invention provides a core/multishell semiconductor nanocrystal comprising a core and multiple shells, which exhibits a type-I band offset and high photoluminescence quantum yield providing bright tunable emission covering the visible range from about 400 nm to NIR over 1600 nm.

Abstract: Cadmium selenide, and other quantum dot materials, can be integrated into thin films of poly(para-phenylene vinylene) (PPV) or other polymer compounds without aggregation of the nanocrystals. Solid-state photoluminescence spectra of composite materials prepared by these novel techniques reveal the effect of this greatly enhanced quantum dot-polymer interface relative to cases where the nanoparticles are aggregated, such that electronic communication and energy transfer between the nanoparticle and polymer components is made more efficient.

Abstract: Embodiments of the invention involve semiconductor nanoparticle capping ligands, their production and use. Ligands may have the formula with m ranging from approximately 8 to approximately 45. An embodiment provides a method of forming a compound of the formula including the steps of providing a first starting material comprising poly(ethyleneglycol) and reacting the first starting material with a second starting material comprising a functional group for chelating to the surface of a nanoparticle to thereby form the compound.

Abstract: A photoluminescent sheet is disclosed. A photoluminescent sheet that includes a matrix resin layer, which is a thermosetting resin; a phosphor, which is included in the matrix resin layer and which converts the wavelength of light emitted from a blue LED; a curing agent, which is included in the matrix resin layer and which cures liquid thermosetting resin; and an additive, which is included in the matrix resin layer and which disperses the phosphor uniformly within the matrix resin layer, can implement white light from light having wavelengths corresponding to blue color.

Abstract: An inorganic phosphor body (102) for a light emitting diode, comprising an inorganic luminescent material is provided. A bonding precursor material (103) is arranged on a surface of said inorganic phosphor body (102), and the bonding precursor material comprises an at least partly hydrolyzed organically modified silane. The attachment of the bonding precursor material to the inorganic phosphor body is separated from the bonding of the inorganic phosphor body to a light emitting diode. Thus, the attachment of the bonding precursor material to the inorganic phosphor body may be performed at conditions detrimental to the LED.

Abstract: The present invention provides polymeric compositions that can be used to modify charge transport across a nanocrystal surface or within a nanocrystal-containing matrix, as well as methods for making and using the novel compositions.

Abstract: Disclosed is a method for preparing an oxide nano phosphor. A metal precursor solution is prepared. The metal precursor solution is impregnated into a porous polymer material. A heat treatment is performed on the porous polymer material having the metal precursor solution impregnated therein. The heat treatment is performed by heating the porous polymer material having the metal precursor impregnated therein up to a temperature of higher than 500° C. solution at a temperature elevating rate of higher than 100° C. per minute.

Abstract: A semiconductor nanocrystal compound and probe are described. The compound is capable of linking to one or more affinity molecules. The compound comprises (1) one or more semiconductor nanocrystals capable of, in response to exposure to a first energy, providing a second energy, and (2) one or more linking agents, having a first portion linked to the one or more semiconductor nanocrystals and a second portion capable of linking to one or more affinity molecules. One or more semiconductor nanocrystal compounds are linked to one or more affinity molecules to form a semiconductor nanocrystal probe capable of bonding with one or more detectable substances in a material being analyzed, and capable of, in response to exposure to a first energy, providing a second energy. Also described are processes for respectively: making the semiconductor nanocrystal compound; making the semiconductor nanocrystal probe; and treating materials with the probe.

Abstract: This invention provides a method to effectively incorporate inorganic fluorescent substance or inorganic contrast medium into latex polymer particles which are used for diagnostic test or the like, and also provides thus produced fluorescent substance-containing latex polymer particles which show decreased non-specific adsorption of protein or the like. Said latex polymer particles are produced by making latex-forming monomer, macromer which has at least a hydrophilic polymer segment and an inorganic fluorescent substance or an inorganic contrast medium co-existent simultaneously in an aqueous medium, and subjecting them to a polymerization reaction.

Abstract: Disclosed herein is a carboxylic ester dispersant shown in the following Formula 1 and a sulfide phosphor paste composition containing the dispersant. The dispersant improves the dispersibility of the sulfide phosphor paste composition and prevents oxidation by a solvent, thus improving processability and the luminescent properties of a phosphor film made from the paste and of a display produced using the film. In Formula 1, n is 1-20.

Abstract: Disclosed is a wavelength-converting converter material comprising at least one wavelength-converting phosphor comprising phosphor particles, wherein a portion of said phosphor or all of said phosphor is present in the form of nanoparticles. Also disclosed is a light-emitting optical component comprising such a converter material and a method for producing such components.