The present invention discloses a nanocomposite coating composition and coating method for antenna reflector. The nanocomposite coating composition comprises a polymer matrix resin and a plurality of graphene nanoparticles. A portion of hardener is firstly added into epoxy resin system. The plurality of graphene nanoparticles is added to acetone solvent and dispersed using an ultrasonic disperser. An appropriate amount of prepared epoxy resin is added to the mixture of graphene and acetone solvent and stirred using a mechanical stirrer for certain period. The sonication process is applied to the graphene incorporated resin mixture for a duration of about 30-120 minutes. The acetone in the mixture is removed using a magnetic stirrer and a vacuum oven. Further, the remainder of the hardener is added to the mixture and degassed using vacuum oven to form the nanocomposite coating composition. The nanocomposite coating composition converts an electromagnetically insulated antenna into an electromagnetically conductive antenna for enhancing one or more electromagnetic characteristics of the antenna reflector.

The present invention discloses a nanocomposite coating composition and coating method for antenna reflector. The nanocomposite coating composition comprises a polymer matrix resin and a plurality of graphene nanoparticles. The plurality of graphene nanoparticles is added to acetone solvent and dispersed using an ultrasonic disperser. An appropriate amount of prepared epoxy resin is added to the mixture of graphene and acetone solvent and stirred using a mechanical stirrer for certain period. The sonication process is applied to the graphene incorporated resin mixture for a duration of about 30-120 minutes. The acetone in the mixture is removed using a magnetic stirrer and a vacuum oven. Further, same hardener is added to the mixture and degassed using vacuum oven to form the nanocomposite coating composition. The nanocomposite coating composition converts an electromagnetically insulated antenna into an electromagnetically conductive antenna for enhancing one or more electromagnetic characteristics of the antenna reflector.

Described are EMI shields comprising a substrate, a metal-based conductive additive, and a binder incorporated with the conductive additive and deposited on the substrate, and methods of making thereof. In some embodiments, a carbon-based additive is included to enhance the mechanical properties and/or conductivity of the EMI shield.

A pigment water dispersion including pigment-containing polyester resin particles. An alcohol component as a raw material monomer of the polyester resin satisfies the following conditions 1 and 2. Condition 1: a content of a compound (I) represented by the following formula (I) in the alcohol component is not more than 7 mol %,

##STR00001##

wherein OR.sup.1 and R.sup.2O are each independently an oxyalkylene group comprising not less than 1 and not more than 4 carbon atoms, and x and y are each independently a positive number of not less than 0. Condition 2: a content of a compound (II) comprising two secondary hydroxy groups except for the compound (I) in the alcohol component is not less than 45 mol %.

The present invention relates to an inverted perovskite prepared by providing a surface-modified metal oxide nanoparticle as a coating agent for forming an electron transporting layer (or electron transport layer), and using the surface-modified metal oxide nanoparticle as a coating agent prepared in a dispersion type.

Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.

A visible light photocatalyst coating includes a metal oxide that in the presence of a organic contaminate that absorbs at least some visible light or includes the metal oxide and an auxiliary visible light absorbent, where upon absorption of degradation of the organic contaminate occurs. Contaminates can be microbes, such as bacteria, viruses, or fungi. The metal oxide is nanoparticulate or microparticulate. The metal oxide can be TiO.sub.2. The coating can include an auxiliary dye having an absorbance of light in at least a portion of the visible spectrum. The coating can include a suspending agent, such as NaOH. The visible light photocatalyst coating can cover a surface of a device that is commonly handled or touched, such as a door knob, rail, or counter.

According to the present invention, provided is a method of producing silver nanoparticles including a mixing step of mixing a thermally decomposable silver compound, an amine compound having 5 or less carbon atoms, and a solvent including an organic solvent having a Log P.sub.OW of 2.0 to 4.0 at a temperature at which the silver compound and the amine compound chemically react; a first heating step of heating a mixed liquid obtained in the mixing step to a first temperature lower than a decomposition temperature of the silver compound; and a second heating step of heating the mixed liquid containing nuclei of the silver nanoparticles to a second temperature equal to or higher than a decomposition temperature of the silver compound.

An antibacterial device is disclosed that includes a substrate and an antibacterial coating or antibacterial surface being provided on at least a part of the substrate's surface. The antibacterial coating or surface includes Angstrom scale flakes, where the Angstrom scale flakes are arranged in a standing position on the substrate surface and are attached to the substrate surface via edge sides thereof. The Angstrom scale flakes can, for example, be graphene flakes, or graphite flakes having a thickness of a few atom layers. It has been found that such standing flakes are efficient in killing prokaryotic cells but do not harm eukaryotic cells.

There is provided an optical apparatus which comprises a lens, and a lens barrel holding the lens, wherein a film is formed on a surface of the lens barrel, the film contains a resin, titanium oxide coated with silica, and an inorganic particle, an average particle size of the inorganic particle is 10 nm or more and 110 nm or less, and an average particle size of the titanium oxide coated with the silica is 0.2 m or more. Thus, it is possible to achieve the optical apparatus which, in an anoxic atmosphere, has less discoloration due to sunlight and less reflectance deterioration even when color is thin, and has the high solar reflectance.