Abstract: Zinc oxide powder of the present invention contains zinc oxide particles, in which primary particles of the zinc oxide particles have a minor axis of 35 nm or more and 350 nm or less and have a Heywood diameter of 35 nm or more and 400 nm or less, and a coefficient of variation of a number distribution of the Heywood diameters of the primary particles of the zinc oxide powder is 50% or less.

Abstract: The present invention provides zinc oxide having excellent infrared blocking ability, high whiteness, and excellent texture during use. The present invention relates to trivalent metal-doped hexagonal plate-shaped zinc oxide having an aspect ratio of 2.5 or greater, the trivalent metal-doped hexagonal plate-shaped zinc oxide having a trivalent metal element content based on the zinc element of 0.15 to 5 mol %, a whiteness of 90 or higher, and a powder spectral reflectance at a wavelength of 1500 nm of 80% or less.

Abstract: A light emitting diode with a zinc oxide layer and a method of fabricating the same are disclosed. The light emitting diode includes: a light emitting structure including a gallium nitride based first conductivity type semiconductor layer, a gallium nitride based second conductivity type semiconductor layer, and an active layer interposed therebetween; and a ZnO transparent electrode layer disposed on the second conductivity type semiconductor layer, wherein the ZnO transparent electrode layer comprises a ZnO seed layer and a ZnO bulk layer formed on the ZnO seed layer, wherein the ZnO bulk layer is porous compared to the ZnO seed layer, wherein an interface between the ZnO seed layer and the second conductivity type semiconductor layer is flatter than an interface between the ZnO seed layer and the ZnO bulk layer, and wherein the interface between the ZnO seed layer and the ZnO bulk layer has an irregular concavo-convex shape.

Abstract: The present invention provides a cosmetic product capable of making the skin look youthful and producing a natural three-dimensional appearance. The present invention relates to a cosmetic product including two or more phosphors each containing an inorganic compound, wherein the cosmetic product, upon excitation by excitation light having a wavelength of 365 nm, emits an emission spectrum having a fluorescence emission peak in each of the range of 400 to 530 nm and the range of 620 to 720 nm and having an I2/I1 of 1 to 30, where I1 is a maximum emission intensity in the range of 530 to 620 nm and I2 is a maximum peak intensity in the range of 620 to 720 nm.

Abstract: LED devices having high-quality single crystal ZnO structures for spreading currents and extracting light out of the LEDs are disclosed. In one aspect, a LED device is provided to include a substrate; a first semiconductor layer exhibiting a first conductivity type and formed over the substrate; an active light-emitting structure formed over the first semiconductor layer, the active light-emitting structure operable to emit light under electrical excitation; a second semiconductor layer exhibiting a second conductivity type and formed over the active light-emitting structure; and a single crystal ZnO structure formed over the second semiconductor layer and including a bottom single crystal ZnO portion over the second semiconductor layer and a top single crystal ZnO portion extending from the bottom single crystal ZnO portion, wherein the bottom single crystal ZnO portion is a contiguous single crystal ZnO portion without having voids.

Abstract: A process for removing iodine using gold particles includes contacting a solution including iodine, with gold particles. The iodine is adsorbed onto the gold particles and then removed. A device for removing iodine using gold particles includes gold particles in a stationary phase and is configured to contact a solution including iodine, with gold particles, to thus adsorb the iodine onto the gold particles and remove the iodine.

Abstract: The invention relates to a piezoelectric lead-free material based on bismuth sodium titanate, to a method for the production thereof, and to the use thereof.

Abstract: Provided are a preparation method of iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles, iron oxide-based nanoparticles prepared by the same, and a T1 contrast agent including the same. More particularly, the disclosure describes a method for preparation of iron oxide nanoparticles having a extremely small and uniform size of 4 nm or less based on thermal decomposition of iron oleate complex, iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles prepared by the same, and a T1 contrast agent including iron oxide-based paramagnetic or pseudo-paramagnetic nanoparticles.

Abstract: A method for forming an electronic switching device on a substrate, wherein the method comprises depositing the active semiconducting layer of the electronic switching device onto the substrate from a liquid dispersion of ligand-modified colloidal nanorods, and subsequently immersing the substrate into a growth solution to increase the diameter and/or length of the nanorods on the substrate, and wherein the as-deposited nanorods are aligned such that their long-axis is aligned preferentially in the plane of current flow in the electronic switching device.

Abstract: It is an object of the present invention to provide zinc oxide particles which have excellent ultraviolet blocking performance and also excellent dispersibility, and therefore can be suitably used as an ultraviolet blocking agent for cosmetics. Provided are zinc oxide particles having a primary particle diameter of less than 0.1 ?m, an aspect ratio of less than 2.5 and an oil absorption/BET specific surface area of 1.5 ml/100 m2 or less.

Abstract: The invention provides antioxidant-containing compositions and methods for confirming antioxidant activity of a composition formulated for topical application to skin. The invention also provides methods for testing a composition for the ability to inhibit both ultraviolet radiation-induced lipid peroxidation on skin and ultraviolet radiation-induced reactive oxygen species formation in the stratum corneum as well as compositions and methods for treating and preventing photodamage to skin.

Abstract: The present invention provides a zinc oxide powder that enables a high degree of orientation, and highly uniform dispersion of an additive substance, to be simultaneously achieved in a green body or a sintered body. The zinc oxide powder of the present invention comprises a plurality of plate-like zinc oxide particles and has a volume-based D50 average particle diameter of 1 to 5 ?m and a specific surface area of 1 to 5 m2/g. The zinc oxide powder has a degree of orientation of the (002) plane of 40% or greater when two-dimensionally arrayed into a monolayer on a substrate.

Abstract: Disclosed are methods for producing ZnO nanostructures, the methods comprising heating an aqueous solution comprising a zinc compound, a base, and a polymer which is polyvinylpyrrolidinone or poly(ethylene glycol).

Abstract: The present invention relates to a method for continuously preparing mineral particles by means of the thermolysis of mineral precursors in an aqueous medium, comprising contacting: a reactive flow, including mineral precursors at a temperature lower than the conversion temperature thereof; and a heat transfer flow that is countercurrent to said reactive flow and contains water at a temperature that is sufficient to bring the precursors to a temperature higher than the conversion temperature thereof, the mixture flow that results from said reactive flow and said heat transfer flow then being conveyed into a tubular reactor, inside of which particles are formed by gradually converting the precursors, and where the reactive flow and the heat transfer flow are placed in contact with each other inside a mixing chamber, inside of which the reactive flow and the heat transfer flow are fed by supply pipes having outlet cross-sections that are smaller than the maximum cross-section of said mixing chamber.

Abstract: A treatment fluid comprises: a metal oxide, wherein the metal oxide is capable of forming a chelate complex or coordination complex with a ligand, wherein the chelate complex or coordination complex has a setting time of less than 90 minutes at a temperature of 71° F. and a pressure of 1 atmosphere. A method of treating a portion of a subterranean formation comprises: introducing the treatment fluid into the subterranean formation; allowing or causing a chelate complex or coordination complex to form between the metal oxide and a ligand; and allowing or causing the chelate complex or coordination complex to set.

Abstract: A droplet generation system includes a first nozzle configuration structured to receive a liquid and a gas under pressure in a controllable feed ratio, and to merge the liquid and gas to form an intermediate stream that is a mixture of the gas and of a dispersed phase of the liquid. A second nozzle configuration is connected to receive the intermediate stream from the first nozzle configuration and has a valve mechanism with one or more controllable operating parameters to emit a stream of droplets of the liquid. The mean size of the droplets is dependent on the controllable feed ratio of the liquid and gas and the flow rate of the stream of droplets is dependent on the controllable operating parameter(s) of the valve mechanism. A corresponding method is disclosed, as is the application of the system and method to the production of nanoparticles in a thermochemical reactor.

Abstract: A process for the preparation of nano zinc oxide particles is disclosed. The process comprises of dissolving a zinc metal precursor in a solvent to obtain a first solution and dissolving a base in an alcohol to obtain an alkali solution. The alkali solution is then added to the first solution over a predetermined period of time to obtain nano zinc oxide particles in solution.

Abstract: It is an object of the present disclosure to provide spherical zinc oxide particles consisting of integrated plate-like particles which can be used as a cosmetic raw material, a thermal conductive filler and the like, and a method for production of the same. Spherical zinc oxide particles consisting of integrated plate-like particles, which have a median size of 0.01 ?m or more and a D90/D10 in particle size distribution of 5.0 or less.

Abstract: The present invention relates to odor-inhibiting compositions comprising water-absorbing polymer particles and metal peroxides, and to the production thereof.

Abstract: The present invention relates to a solution reaction apparatus and solution reaction method using the same, and more particularly a solution reaction apparatus and a solution reaction method using the same, wherein a reaction vessel is made by using a sealing member, a reaction vessel forming member, and a substrate serving as the bottom part of the reaction vessel so as to cause one side of a reaction solution only to contact the solution, thereby adjusting the temperature of the substrate differently from the temperature of the solution. The solution reaction apparatus of the present invention can control temperature of the substrate and temperature of the reaction solution separately, thereby it can control the temperature of the solution above the boiling point of the solution, and can react the solution while constantly maintaining the concentration of the solution by the solution circulatory device. Accordingly, it has an effect of freely forming various nanostructures on the substrate.

Abstract: The present disclosure relates to a novel photocatalyst composition and a process of using the photocatalyst for the photocatalytic degradation of methyl tertiary-butyl ether (MTBE) in water. Palladium doped nano zinc oxide photocatalyst was prepared by zinc nitrate hexahydrate and an ammonium carbonate and the photocatalyst composition demonstrated more than 90-99% degradation of MTBE at room temperatures in a photo catalytic reaction conducted in an oxygen saturated aqueous medium.

Abstract: A novel composition for a photocatalyst Fe doped ZnO nano-particle photocatalyst that enables the decontamination process by degrading toxic organic material such as brilliant cresyl blue, indigo carmine and gentian blue by using solar light is described. In the current disclosure method of making a specific size of the nano photocatalyst is described. Characterization of the photocatalyst, optimal working conditions and efficient use of solar light has been described to show that this photocatalyst is unique. The process described to use the photocatalyst to degrade toxic organic material using the solar light to activate the photocatalyst is cost efficient and cheap to clean our water resources.

Abstract: The present invention includes the steps of (A) forming a solution containing zinc into mist and spraying the solution formed into mist onto a substrate under no vacuum to form a metal oxide film on the substrate, and (B) irradiating the metal oxide film with ultraviolet rays to decrease a resistance of the metal oxide film. Further, the step (B) includes the steps of (B-1) determining, in accordance with a film thickness of the metal oxide film, wavelengths of the ultraviolet rays to be radiated, and (B-2) irradiating the metal oxide film with the ultraviolet rays having the wavelengths determined in said step (B-1).

Abstract: Provided is a nanowire manufacturing substrate, comprising a grid base layer on a substrate and a grid pattern formed by patterning the grid base layer, the grid pattern being disposed to produce a nanowire on a surface thereof. According to the present invention, the width and height of the nanowire can be adjusted by controlling the wet-etching process time period, and the nanowire can be manufactured at a room temperature at low cost, the nanowire can be mass-manufactured and the nanowire with regularity can be manufactured even in case of mass production.

Abstract: Provided herein are nanofibers and processes of preparing nanofibers. In some instances, the nanofibers are metal and/or ceramic nanofibers. In some embodiments, the nanofibers are high quality, high performance nanofibers, highly coherent nanofibers, highly continuous nanofibers, or the like. In some embodiments, the nanofibers have increased coherence, increased length, few voids and/or defects, and/or other advantageous characteristics. In some instances, the nanofibers are produced by electrospinning a fluid stock having a high loading of nanofiber precursor in the fluid stock. In some instances, the fluid stock comprises well mixed and/or uniformly distributed precursor in the fluid stock. In some instances, the fluid stock is converted into a nanofiber comprising few voids, few defects, long or tunable length, and the like.

Abstract: Zinc oxide particles having high transparency in visible light and high shielding properties in a ultraviolet region, with surface treatment of inactivating photocatalytic activity applied thereto, and a dispersion thereof. A manufacturing method of surface treated zinc oxide particles, including: a first step of mixing a dispersion liquid with zinc oxide particles dispersed in a solvent, and silicone resin having polysiloxane bond with at least one or more silicon atoms having a silanol group (Si—OH) and/or alkoxy silyl group (Si—OR, wherein R is alkyl group); obtaining a mixed solution containing a surface treated zinc oxide particles precursor, with the silicone resin adsorbed on the surface of each zinc oxide particle and the solvent, and drying and solidifying the mixed solution by applying heat treatment thereto, to thereby manufacture a dried body; and a second step of pulverizing the dried body, to thereby manufacture the surface treated zinc oxide particles.

Abstract: Provided is a zinc oxide sputtering target, which can effectively suppress the occurrence of break or crack in the target during sputtering to enable production of a zinc oxide transparent conductive film with high productivity. The zinc oxide sputtering target is composed of a zinc oxide sintered body comprising zinc oxide crystal grains, wherein the zinc oxide sputtering target has a sputter surface having a (100) crystal orientation degree of 50% or more.

Abstract: Flexible semiconductor devices based on flexible freestanding epitaxial elements are disclosed. The flexible freestanding epitaxial elements provide a virgin as grown epitaxy ready surface for additional growth layers. These flexible semiconductor devices have reduced stress due to the ability to flex with a radius of curvature less than 100 meters. Low radius of curvature flexing enables higher quality epitaxial growth and enables 3D device structures. Uniformity of layer formation is maintained by direct absorption of actinic radiation by the flexible freestanding epitaxial element within a reactor. In addition, standard post processing steps like lithography are enabled by the ability of the devices and elements to be flattened using a secondary support element or vacuum. Finished flexible semiconductor devices can be flexed to a radius of curvature of less than 100 meters. Nitrides, Zinc Oxides, and their alloys are preferred materials for the flexible freestanding epitaxial elements.

Abstract: The present invention relates to a process for the preparation of nanoparticulate zinc oxide in the form of aqueous suspensions or in the form of pulverulent solid. Furthermore, the invention relates to the use of zinc oxide particles and suspensions prepared in this way in cosmetic sunscreen preparations, as stabilizer in plastics, in paints, in coatings and as antimicrobial active ingredient.

Abstract: Provided are methods for producing nanostructures and nanostructures obtained thereby. The methods include heating a certain point of a substrate dipped into a precursor solution of the nanostructures so that the nanostructures are grown in a liquid phase environment without evaporation of the precursor solution. The methods show excellent cost-effectiveness because of the lack of a need for precursor evaporation at high temperature. In addition, unlike the vapor-liquid-solid (VLS) process performed in a vapor phase, the method includes growing nanostructures in a liquid phase environment, and thus provides excellent safety and eco-friendly characteristics as well as cost-effectiveness. Further, the method includes locally heating a substrate dipped into a precursor solution merely at a point where the nanostructures are to be grown, so that the nanostructures are grown directly at a desired point of the substrate. Therefore, it is possible to grow and produce nanostructures directly in a device.

Abstract: A process for preparing a mesoporous metal oxide, i.e., transition metal oxide, Lanthanide metal oxide, a post-transition metal oxide and metalloid oxide. The process comprises providing an acidic mixture comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the acidic mixture at a temperature and for a period of time sufficient to form the mesoporous metal oxide. A mesoporous metal oxide prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous metal oxides. The method comprises providing an acidic mixture comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the acidic mixture at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous metal oxides. Mesoporous metal oxides and a method of tuning structural properties of mesoporous metal oxides.

Abstract: A sol-flame method includes 1) forming a sol-gel precursor solution of a source of a dopant; 2) coating a nanostructure or a thin film with the sol-gel precursor solution; and 3) subjecting the coated nanostructure or the coated thin film to flame annealing to form a doped nanostructure or a doped thin film.

Abstract: A process for preparing a mesoporous metal oxide, i.e., transition metal oxide, Lanthanide metal oxide, a post-transition metal oxide and metalloid oxide. The process comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to form the mesoporous metal oxide. A mesoporous metal oxide prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous metal oxides. The method comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous metal oxides. Mesoporous metal oxides and a method of tuning structural properties of mesoporous metal oxides.

Abstract: A process comprises (a) combining (1) at least one base and (2) at least one metal carboxylate salt comprising (i) a metal cation selected from metal cations that form amphoteric metal oxides or oxyhydroxides and (ii) a lactate or thiolactate anion, or metal carboxylate salt precursors comprising (i) at least one metal salt comprising the metal cation and a non-interfering anion and (ii) lactic or thiolactic acid, a lactate or thiolactate salt of a non-interfering, non-metal cation, or a mixture thereof; and (b) allowing the base and the metal carboxylate salt or metal carboxylate salt precursors to react.

Abstract: A method of manufacturing a zinc oxide thin film includes: preparing a basic solution containing tetrahydroxozincate (II) ions and having a pH of 10 or more; diluting the basic solution such that the pH becomes 8.5 or less; applying the basic solution to a substrate; and heating the basic solution.

Abstract: A lithographic process includes the use of a silicon-containing polymer or a compound that includes at least one element selected from the group consisting of: Ta, W, Re, Os, Ir, Ni, Cu or Zn in a resist material for an EUV lithographic process. The wavelength of the EUV light used in the process is less than 11 nm, for example 6.5-6.9 nm. The invention further relates to novel silicon-containing polymers.

Abstract: An object of the present invention is to provide rounded zinc peroxide particles having a large particle diameter, the rounded zinc peroxide particles having excellent performance because they have an average particle diameter of 0.04 ?m or more, a small aspect ratio and a shape close to a spherical shape; rounded zinc oxide particles which are obtained by calcinating the rounded zinc peroxide particles and which have a small aspect ratio and a sharp particle size distribution; a method for production thereof; and a cosmetic and a heat releasing filler each containing the rounded zinc oxide particles. Provided are rounded zinc peroxide particles having an average particle diameter of 0.04 ?m or more and an aspect ratio of 2.0 or less, and rounded zinc oxide particles which are obtained by thermally decomposing the rounded zinc peroxide particles and which have an average particle diameter of 0.04 ?m or more and an aspect ratio of 2.0 or less.

Abstract: ZnO structures comprising crystalline ZnO micro or nanorods and methods for making and using these ZnO structures are provided. The side surface of the central portion of each rod may comprise planes of the form {1 0 ?1 0}, {0 1 ?1 0}, {?1 1 0 0}, {?1 0 1 0}, {0 ?1 1 0} or {1 ?1 0 0}, with central edge regions including a crystallographic plane of the form {2 ?1 ?1 0} or {?2 1 1 0}. The tip of the rod may comprise planes of the form {1 0 ?1 1} {0 1 ?1 1}, {?1 1 0 1}, {?1 0 1 1}, {0 ?1 1 1} or {1 ?1 0 1} with tip edge regions including a crystallographic plane of the form {2 ?1 ?1 2} or {?2 1 1 2}. The rods may be joined at or near their bases to form a “flower-like” morphology. In an embodiment, a synthesis mixture is prepared by dissolving a zinc salt in an alcohol solvent, followed by addition of at least two additives. The zinc salt may be zinc nitrate hexahydrate, the first additive may be benzyl alcohol and the second additive may be urea.

Abstract: Nanocrystals comprising organic ligands at surfaces of the plurality of nanocrystals are provided. The organic ligands are removed from the surfaces of the nanocrystals using a solution comprising a trialkyloxonium salt in a polar aprotic solvent. The removal of the organic ligands causes the nanocrystals to become naked nanocrystals with cationic surfaces.

Abstract: Process for the preparation of modified ZnO particles in which a zinc salt and a base are mixed in a polar solvent and, if appropriate after the precipitation of a precipitation product, the polar solvent is removed and a residue is obtained, where the residue is taken up in a nonpolar solvent, surface-active substances are added, optionally further effect substances are added and then the modified ZnO particles are separated off from further by-products. Materials such as plastics, coatings or paints comprising modified ZnO particles. Methods for the incorporation of modified ZnO particles into materials, where the modified ZnO particles are incorporated into the materials in the form of dispersions or suspensions. Use of modified ZnO particles for protecting material against the effect of light, heat, oxygen or free radicals, as catalysts, for semiconductive films or cosmetic applications.

Abstract: A treatment fluid comprises: a metal oxide, wherein the metal oxide is capable of forming a chelate complex or coordination complex with a ligand, wherein the chelate complex or coordination complex has a setting time of less than 90 minutes at a temperature of 71° F. and a pressure of 1 atmosphere. A method of treating a portion of a subterranean formation comprises: introducing the treatment fluid into the subterranean formation; allowing or causing a chelate complex or coordination complex to form between the metal oxide and a ligand; and allowing or causing the chelate complex or coordination complex to set.

Abstract: A method for preparing nanotubes by providing nanorods of a piezoelectric material having an asymmetric crystal structure and by further providing hydroxide ions to the nanorods to etch inner parts of the nanorods to form the nanotubes.

Abstract: Toxic organic materials contaminate water resources and one need to find an easy and energy efficient way to decontaminate water resources. The current invention discloses a photocatalyst Fe doped ZnO nano-particle photocatalyst that enables the decontamination process by degrading toxic organic material such as brilliant cresyl blue, indigo carmine and gentian blue by using solar light. In the current disclosure many examples of characterization of the photocatalyst, optimal working conditions and efficient use of solar light has been described. The process described to use the photocatalyst to degrade toxic organic material using the solar light to activate the photocatalyst is cost efficient and cheap to clean our water resources.

Abstract: The present invention generally relates to an amorphous semiconductor material and TFTs containing the material. The semiconductor material contains a single cation, such as zinc, and multiple anions. For the multiple anions, only one of the anions can be oxygen or nitrogen. The anions compete with each other to twist the resulting structure. For example, if one of the anions bonded with the cation would result in a cubic structure, and another of the anions bonded with the cation would result in a hexagonal structure, the competing anions would twist the resulting structure so that the structure remains amorphous rather than crystalline. Further, because a single cation is utilized, there is no grain boundary and thus, the material has a high mobility.

Abstract: It is an object of the present invention to provide a new method for production of zinc oxide particles which can control the particle diameter and particle shape of obtained zinc oxide particles by selecting suitable conditions, and can prepare zinc oxide applicable to various applications. A method for production of zinc oxide particles, comprising a step of aging a zinc oxide raw material in an aqueous zinc salt solution.

Abstract: Nanostructured manganese-containing compositions having reduced manganese dissolution and methods of making and using the same are provided. In one embodiment, a composition of matter comprises a nanostructured oxide or hydroxide doped with Mn4+. The composition of matter can be made by forming a nanostructured oxide or hydroxide material doped with Mn3+ and oxidizing the Mn3+ to Mn4+ to reduce dissolution of the manganese in the nanostructured oxide or hydroxide material. In another embodiment, a method of reducing dissolution of manganese present in a nanostructured MnO2 material comprises: doping a nanostructured MnO2 material with Fe3+ to reduce the dissolution of the manganese.

Abstract: The present invention relates to thermal insulation materials made of hollow oxide particles. Use of hollow oxide particles having an overall thermal conductivity of less than 0.026 W/(mK) is for example suitable for the building sector or other areas where thermal insulation is required.

Abstract: An object of the present invention is to provide hexagonal plate-shaped zinc oxide particles which can be used as a cosmetic raw material, a heat releasing filler and the like, a method for production of the same, and a cosmetic, a heat releasing filler, a heat releasing resin composition, a heat releasing grease and a heat releasing coating composition each comprising the same. Provided are hexagonal plate-shaped zinc oxide particles having hexagonal-shaped surfaces, wherein the primary particle diameter is 0.01 ?m or more and the aspect ratio is 2.5 or more, and 50% or more of 250 particles in a transmission electron microscope photograph satisfy both the requirements (1) the particle has a hexagonal-shaped surface; and (2) Dmin/Dmax?0.

Abstract: It is an object of the present invention to provide zinc oxide particles which have excellent ultraviolet blocking performance and also excellent dispersibility, and therefore can be suitably used as an ultraviolet blocking agent for cosmetics. Provided are zinc oxide particles having a primary particle diameter of less than 0.1 ?m, an aspect ratio of less than 2.5 and an oil absorption/BET specific surface area of 1.5 ml/100 m2 or less.

Abstract: A topical formulation for application to exposed body tissue, the formulation comprising a silver(II) oxide and zinc oxide, intimately dispersed within a carrier medium.