An object is to reduce variation in shape of crystals that are to be formed. Solutions containing respective raw materials are made in an environment where an oxygen concentration is lower than that in air, the solutions containing the respective raw materials are mixed in an environment where an oxygen concentration is lower than that in air to form a mixture solution, and with use of the mixture solution, a composite oxide is formed by a hydrothermal method.

An object is to reduce variation in shape of crystals that are to be formed. Solutions containing respective raw materials are made in an environment where an oxygen concentration is lower than that in air, the solutions containing the respective raw materials are mixed in an environment where an oxygen concentration is lower than that in air to form a mixture solution, and with use of the mixture solution, a composite oxide is formed by a hydrothermal method.

The present invention relates to a fiber-nanowire composite-based sheet having super-amphiphilic characteristics. In the present invention, fibers including metal nanoparticles or metal oxide nanoparticles embedded in the fibers or located on the surface of the fibers are synthesized, and a sheet based on a composite in which metal nanowires or metal oxide nanowires have been grown from the above fibers is provided.

A sheet of the present invention has super-amphiphilic characteristics and can be used in various fields such as the antibacterial filter field, the antibacterial film field, the antiviral filter field, the antiviral film field, the antifouling coating field, the drug delivery vehicle field, or the water treatment filter field.

The present invention relates to single crystalline NaUO.sub.3, hydrothermal growth processes of making such single crystals and methods of using such single crystals. In particular, Applicants disclose single crystalline NaUO.sub.3 in the R32 space group. Unlike other powdered NaUO.sub.3, Applicants' single crystalline NaUO.sub.3 has a sufficient crystal size to be characterized and used in the fields of laser light, infrared countermeasures, nuclear fuel material, nuclear forensics and magnetic applications.

The present invention relates to single crystalline NaUO.sub.3, hydrothermal growth processes of making such single crystals and methods of using such single crystals. In particular, Applicants disclose single crystalline NaUO.sub.3 in the R32 space group. Unlike other powdered NaUO.sub.3, Applicants' single crystalline NaUO.sub.3 has a sufficient crystal size to be characterized and used in the fields of laser light, infrared countermeasures, nuclear fuel material, nuclear forensics and magnetic applications.

An α- or β-Ga.sub.2O.sub.3 crystal is produced by bringing an aqueous solution including a Ga ion into a supercritical state having a temperature of 400° C. or more and a pressure of 22.1 MPa or more.

An α- or β-Ga.sub.2O.sub.3 crystal is produced by bringing an aqueous solution including a Ga ion into a supercritical state having a temperature of 400° C. or more and a pressure of 22.1 MPa or more.

A method of producing nanoparticles comprises effecting conversion of a molecular cluster compound to the material of the nanoparticles. The molecular cluster compound comprises a first ion and a second ion to be incorporated into the growing nanoparticles. The conversion can be effected in the presence of a second molecular cluster compound comprising a third ion and a fourth ion to be incorporated into the growing nanoparticles, under conditions permitting seeding and growth of the nanoparticles via consumption of a first molecular cluster compound.

A method of producing nanoparticles comprises effecting conversion of a molecular cluster compound to the material of the nanoparticles. The molecular cluster compound comprises a first ion and a second ion to be incorporated into the growing nanoparticles. The conversion can be effected in the presence of a second molecular cluster compound comprising a third ion and a fourth ion to be incorporated into the growing nanoparticles, under conditions permitting seeding and growth of the nanoparticles via consumption of a first molecular cluster compound.

The present invention relates to solvothermal vapor synthesis methods for the crystallization of a phase from a mixture of selected inorganic or organic precursors in an unsaturated vapor-phase reaction medium.