Nanowire synthesis and one dimensional nanowire synthesis of titanates and cobaltates. Exemplary titanates and cobaltates that are fabricated and discussed include, without limitation, strontium titanate (SrTiO.sub.3), barium titanate (BaTiO.sub.3), lead titanate (PbTiO.sub.3), calcium cobaltate (Ca.sub.3Co.sub.4O.sub.9) and sodium cobaltate (NaCo.sub.2O.sub.4).

Highly luminescent nanostructures, particularly highly luminescent quantum dots, comprising a nanocrystal core are provided. Also provided are methods of increasing the sphericity of nanostructures comprising subjecting nanocrystal cores to an acid etch step, an annealing step, or a combination of an acid etch step and an annealing step.

Provided are a compound, including metal atoms for forming metal nano particles through a simple process within a short time at a low production cost for commercial purposes, and a solution including the compound.

A blue light emitting semiconductor nanocrystal having an quantum yield of greater than 20% can be incorporated in a light emitting device.

An e-type iron-based oxide magnetic particle powder has narrow particle size distribution and has a low content of fine particles which do not contribute to magnetic recording characteristics. As a result, a narrow coercive force distribution is achieved and the powder is suitable for increasing recording density of a magnetic recording medium. The powder containing substituting metal elements can be obtained by: adding an alkali to an aqueous solution containing trivalent iron ions and ions of the metals for partially substituting Fe sites to neutralize the aqueous solution to a pH of 1.5 to 2.5; then adding a hydroxycarboxylic acid; further adding the alkali to neutralize the aqueous solution to a pH of 8.0 to 9.0; washing with water a precipitation of an iron oxyhydroxide containing the substituting metal elements produced; and coating the iron oxyhydroxide containing the substituting metal elements with a silicon oxide and heating the resultant.

This application relates to monolayers of Si.sub.2BN or C.sub.2BN, arranged in a graphiticized hexagonal arrangement. Each Si/C atom has a Si/C, B, and N nearest neighbor, while each B (N) has two Si/C's and one N (B) as nearest neighbors. The monolayer can be a 2D composition or can be “rolled” into a nanotubular 3D arm-chair or zig-zag configuration.

The present investigation is development of the TiO.sub.2 nanotubes concept of preparation of and their composite with fine dispersion of copper. The inventions also relates to identify a method for optimum amount of photocatalyst required for efficient and maximum hydrogen production reported than earlier (H.sub.2=99,823 μmol.Math.h.sup.−1.Math.g.sup.−1 catalyst) from glycerol-water mixtures under solar light irradiation. A method is disclosed to produce CuO/TiO.sub.2 nanotubes with high sustainability and recyclable activity for hydrogen production.

A process for manufacturing silver nanowires is provided, wherein the recovered silver nanowires have a high aspect ratio; and, wherein the total glycol concentration is <0.001 wt % at all times during the process.

Disclosed is a photodiode, which includes a graphene-silicon quantum dot hybrid structure, having improved optical and electrical characteristics by controlling the sizes of silicon quantum dots and the doping concentration of graphene. The photodiode including the graphene-silicon quantum dot hybrid structure of the present disclosure may be easily manufactured, may be manufactured over a large area, has a wide photodetection band from the ultraviolet light region to the near infrared region, and allows selective absorption energy control.

There is provided a semiconductor nanocrystal or quantum dot comprising a core made of a material and at least one shell made of another material. Also there is provided a composite comprising a plurality of such nanocrystals or quantum dots. Moreover, there is provided a method of measuring the temperature of an object or area, comprising using a temperature sensor comprising a semiconductor nanocrystal or quantum dot of the invention.