A particulate composite ceramic material may include: particles of at least one first ultra-high-temperature ceramic UHTC, the outer surface of the particles being at least partially covered by a porous layer made of at least one second UHTC in amorphous form; and the particles defining a space therebetween; optionally, porous clusters of the at least one second ultra-high-temperature ceramic in amorphous form, distributed in said space; a dense matrix and at least one third UHTC in crystallized form at least partially filling the space; optionally, a dense coating made of at least the third UHTC in crystallized form, covering the outer surface of the matrix, the matrix and the coating representing 5% to 90% by mass with respect to the total mass of the material. A part may include such a particulate ceramic composite material.

Multifunctional nanoparticles can include two or more different populations of nanocrystals that impart a combination of properties arising from the constituent populations in a single, multifunctional nanoparticle.

Dark colored roofing granules include an inert base particle coated with a composition including a metal silicate, a non-clay latent heat reactant, and a dark colored but solar reflective pigment.

There is provided an optical film including an acrylic film, and a functional coating layer formed on at least one side of the acrylic film. The functional coating layer includes a water-dispersible resin and at least two kinds of fine particles having different average particle sizes.

There is described a process for depositing carbon on a surface, comprising, while contacting a mixture of CO.sub.2 and Br.sub.2 with a polar substrate presenting apposed surfaces, exposing a sufficient area of said mixture in the region of said apposed surfaces to light of sufficient intensity and frequency to result in deposition of carbon on at least some of said apposed surfaces. Other embodiments are also described.

According to the present invention, there is provide a coated film that is excellent in surface hardness and abrasion resistance and has good adhesion between a polyester film and a hard coat layer. The present invention relates to a coated film comprising a polyester film and a coating layer formed on at least one surface of the polyester film, the coating layer being prepared from a coating solution comprising a (meth)acrylate compound, a reactive silica comprising a (meth)acryloyl group, and an isocyanate-based compound.

A nanoparticle has at least one dimension less than 500 nm and comprises a silica surface and a plurality of zwitterionic functional groups covalently bound to the silica surface. Such nanoparticles and dispersions contain such nanoparticle are prepared and used for a variety of purposes.

Provided are a chip with a stereoscopic texture for a resin-based reinforced natural stone and a resin-based reinforced natural stone including the same. A chip with a stereoscopic texture can be obtained by coating a pigment on a surface of a crushed reinforced natural stone chip. In a resin-based reinforced natural stone to which the chip with a stereoscopic texture is added, a boundary surface between the chip and a matrix is formed, such that a texture of natural stone and a three-dimensional stereoscopic effect may be implemented, thereby making it possible to implement an aesthetically beautiful surface.

Solar-reflective roofing granules having improved solar heat-resistance are formed by coating colored mineral particles with a coating composition including titanium dioxide nanoparticles.

There is described a process for depositing carbon on a surface, comprising, while contacting a mixture of CO.sub.2 and Br.sub.2 with a polar substrate presenting apposed surfaces, exposing a sufficient area of said mixture in the region of said apposed surfaces to light of sufficient intensity and frequency to result in deposition of carbon on at least some of said apposed surfaces. Other embodiments are also described.