Abstract:
The invention relates to a process for producing self-illuminating bodies (101..104), in which a recess (1) is made in a housing part (2, 3) of a housing and a fluorescent and/or phosphorescent layer (7) and/or a mask (9) is arranged on a boundary wall (12) of a cavity (5) which is formed by joining the housing parts (2, 3) together. The housing parts (2, 3) are connected in a gastight manner, with at least one feed opening (4) from outside into the cavity (5) remaining open. Furthermore, a medium (6) emitting decaying radiation is introduced through the at least one feed opening (4) into the cavity (5), the decaying radiation being intended to illuminate the fluorescent and/or phosphorescent layer (7). Furthermore, a self-illuminating body (101..104) and also the use thereof are specified.
Abstract:
Provided is an aerosol method for preparing powdered products of a variety of materials involving generating a flowing aerosol in an aerosol generator (106) and conducting the flowing aerosol through a furnace (110) to heat the flowing aerosol to form particles, with controlled flow of the flowing aerosol through the heater (110). The particles may be cooled in a particle cooler (320) and then collected in a particle collector (114).
Abstract:
The invention relates to phosphor powders and a method for making phosphor powders. The powders are oxygen-containing, such as metal oxides, borates or titanates and have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the continuous production of such powders. The invention also relates to improved devices, such as display devices, incorporating those shown by the figure, incorporating the phosphor powders.
Abstract:
The present invention generally relates to composition and methods for upconverting light. In some embodiments, the composition and methods comprise an organic material, a nanocrystal, and a ligand capable of facilitating energy transfer between the nanocrystal and the organic material. In certain embodiments, the nanocrystal has a first excited energy state with an energy greater than a triplet state of the organic material. The organic material, in some embodiments, may be aromatic and/or include one or more pi-conjugated carbon-carbon double bonds. In some cases, incident light may be absorbed by the nanocrystal to produce triplet excitons. The triplet excitons may then transfer from the nanocrystal to the organic material and undergo triplet-triplet annihilation, creating a singlet state of approximately twice the energy of the triplet exciton. In certain embodiments, the singlet state fluoresces, resulting in the formation of a high energy photon.
Abstract:
A composite particle that includes: a fluorescent semiconductor core/shell nanoparticle (preferably, nanocrystal); and a malonic acid derivative attached to the core/shell nanoparticle outer surface, wherein the malonic acid derivative (prior to attachment to the nanoparticle) has the following Formula (I): wherein: R 1 is a linear or branched alkyl group having 8 or more carbon atoms, or a linear or branched alkylene group having 8 or more carbon atoms (wherein it is understood that C-R 1 is a single or double bond); R 2 is H or a linear or branched alkyl group having 1 or more carbon atoms; and x is 0 (resulting in C=R 1 ) or 1 (resulting in C-R 1 ); and wherein the malonic acid derivative is liquid at room temperature (prior to attachment to the nanoparticle).
Abstract:
Sulfur-containing phosphor powders, methods for making phosphors powders and devices incorporating same. The powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention permits the continuous production of such powders. The invention also relates to products, such as display devices incorporating such phosphor powders, as exemplified by the figure.
Abstract:
The invention provides a process for the production of a (particulate) luminescent material comprising particles, especially substantially spherical particles, having a porous inorganic material core with pores, especially macro pores, which are at least partly filled with a polymeric material with a first material embedded therein, wherein the process comprises (i) impregnating the particles of a particulate porous inorganic material with pores with a first liquid ("ink") comprising the first material and a curable or polymerizable precursor of the polymeric material, to provide pores that are at least partly filled with said first material and curable or polymerizable precursor; and (ii) curing or polymerizing the curable or polymerizable precursor within pores of the porous material, as well as a product obtainable thereby. The firs material comprises one or more materials selected from a group of materials comprising organic luminescent materials, rare-earth luminescent materials, organic dye materials, inorganic dye materials, thermochromic materials, photochromic materials, liquid crystal materials, magnetic materials, scattering materials, high-refractive index materials, radio-active materials, contrast agents and therapeutic agents.
Abstract:
Disclosed herein is an isolable colloidal particle comprising a nanoparticle and an inorganic capping agent bound to the surface of the nanoparticle, a solution of the same, a method for making the same from a biphasic solvent mixture, and the formation of structures and solids from the isolable colloidal particle. The process can yield photovoltaic cells, piezoelectric crystals, thermoelectric layers, optoelectronic layers, light emitting diodes, ferroelectric layers, thin film transistors, floating gate memory devices, imaging devices, phase change layers, and sensor devices.
Abstract:
Provided is an aerosol method, and accompanying apparatus, for preparing powdered products of a variety of materials involving the use of an ultrasonic aerosol generator (106) including a plurality of ultrasonic transducers (120) underlying and ultrasonically energizing a reservoir of liquid feed (102) which forms droplets of the aerosol. Carrier gas (104) is delivered to different portions of the reservoir by a plurality of gas delivery ports (136) delivering gas from a gas delivery system. The aerosol is pyrolyzed to form particles, which are then cooled and collected. The invention also provides powders made by the method and devices made using the powders.