According to an embodiment of the present invention, provided are hollow particles which have a wall portion containing polyurethane or polyurea, have an internal porous structure, and have a plurality of opening spaces blocked by the wall portion in an outermost portion of the porous structure, and a manufacturing method thereof, and a pore forming material, particles for cosmetics, and a weight reducing material.

This invention provides hollow particles having a shell containing at least one layer and having an average particle diameter of 10 to 150 nm, wherein a ratio between absorbance at 908 cm.sup.1 (A908) and absorbance at 1722 cm.sup.1 (A1722) in an infrared absorption spectrum obtained by measuring the hollow particles by ATR-FTIR (absorbance ratio : A908/A1722) is 0.1 or less.

The present invention relates to a process for producing a plurality of hollow inorganic nanoparticles, which process comprises: (a) contacting a first monomer and a second monomer in a solvent to produce a composition comprising the solvent and a plurality of polymer nanoparticles; (b) adding an inorganic compound precursor to the composition comprising the solvent and the plurality of polymer nanoparticles to produce a composition comprising the solvent and a plurality of inorganic compound-coated polymer nanoparticles; (c) adding an additional amount of the first and second monomers to the composition comprising the solvent and the plurality of inorganic compound-coated polymer nanoparticles to produce a composition comprising the solvent and a plurality of composite nanoparticles; and (d) heating the plurality of composite nanoparticles to produce the plurality of hollow inorganic nanoparticles, wherein in step (a) the first monomer and the second monomer are contacted in the solvent at a temperature of at least 30 C. The present invention also relates to plurality of hollow inorganic nanoparticles and uses thereof.

Hollow particles containing monocrystalline titanium oxide and silica, and having a titanium oxide content of 86.0-99.5 mol % and a silica content of 0.5-14.0 mol %; and a method of producing the particles. A white ink containing the hollow particles as a coloring agent; the use of the white ink in inkjet recording; and a method for inkjet recording using the white ink.

The present invention concerns a method for the preparation of metal oxide hollow nanoparticles comprising the steps of: providing an aqueous suspension of nanoparticles of an oxide of a first element having at least two oxidation states coupled with a substrate; placing in contact the aqueous suspension with an aqueous solution of a salt of a second element having at least two oxidation states having a standard reduction potential lower than the standard reduction potential of said first transition metal to obtain hollow nanoparticles.

The present invention relates to a method for preparing solid capsules comprising a compound A, dispersed in a composition C4. The invention also relates to an encapsulation method, to the capsules obtained by this method, to a composition comprising them, as well as to a method using such capsules.

The present invention relates to a method for preparing solid capsules comprising a compound A, dispersed in a composition C4.

The present invention concerns a method for the preparation of metal oxide hollow nanoparticles comprising the steps of: providing an aqueous suspension of nanoparticles of an oxide of a first element having at least two oxidation states coupled with a substrate; placing in contact the aqueous suspension with an aqueous solution of a salt of a second element having at least two oxidation states having a standard reduction potential lower than the standard reduction potential of said first transition metal to obtain hollow nanoparticles.

The present invention relates to compositions comprising a hollow glucan particle or cell wall particle encapsulating a terpene component, methods of their manufacture and their use. The compositions are suitable for preventing and treating infections in plants and animals, including humans.

The present disclosure discloses a method of preparing a carbon-coated ceria hollow sphere, which includes the following steps of: S110, dispersing silica in a solvent to obtain a silica dispersion; S120, performing a hydrothermal reaction between the silica dispersion and a cerium salt to obtain a ceria-coated silica microsphere; S140, coating the ceria-coated silica microsphere with a carbon source to obtain a primary product, wherein the carbon source is dopamine; S160, sintering the primary product under a protective gas atmosphere to obtain a carbon-coated ceria microsphere; and S170, etching the carbon-coated ceria microsphere by using an etchant to obtain a carbon-coated ceria hollow sphere.