The invention provides a method for producing composite nanoparticles, the method using a first compound capable of transitioning from a monoclinic to a tetragonal rutile crystal state upon heating, and having the steps of subjecting the first compound to a hydrothermal synthesis to create anisotropic crystals of the compound; encapsulating the first compound with a second compound to create a core-shell construct; and annealing the construct as needed. Also provided is a device for continuously synthesizing composite nanoparticles, the device having a first precursor supply and a second precursor supply; a mixer to homogeneously combine the first precursor and second precursor to create a liquor; a first microreactor to subject the liquor to hydrothermic conditions to create an\isotropic particles in a continuous operation mode; and a second microreactor for coating the particles with a third precursor to create a core-shell construct.

Composites having semiconductor structures embedded in a matrix are described. In an example, a composite includes a matrix material. A plurality of semiconductor structures is embedded in the matrix material. Each semiconductor structure includes an anisotropic nanocrystalline core composed of a first semiconductor material. Each semiconductor structure also includes a nanocrystalline shell composed of a second, different, semiconductor material at least partially surrounding the anisotropic nanocrystalline core. An insulator layer encapsulates each nanocrystalline shell and anisotropic nanocrystalline core pairing.

A nickel-based active material precursor for a lithium secondary battery includes: a secondary particle including a plurality of particulate structures, wherein each particulate structure includes a porous core portion and a shell portion, the shell portion including primary particles radially arranged on the porous core portion; and the secondary particle has a plurality of radial centers. When the nickel-based active material precursor is used, a nickel-based positive active material having a short lithium ion diffusion distance, in which intercalation and deintercalation of lithium are facilitated, may be obtained. A lithium secondary battery manufactured using the positive active material may exhibit enhanced lithium availability, and may exhibit enhanced capacity and lifespan due to suppression of crack formation in the active material during charging and discharging.

The present invention relates to a particulate porous carbon material having a continuous porous structure, the particulate porous carbon material satisfying the following A to C: A: branch portions forming the continuous porous structure have an aspect ratio of 3 or higher; B: the branch portions have aggregated through joints interposed therebetween, the number of the aggregated branch portions (N) being 3 or larger; C: a ratio of the number of the aggregated branch portions (N) to the number of the joints (n), N/n, is 1.2 or larger.

Provided is a thermal compound composition having heat dissipation and electrical insulation properties, where the thermal compound composition includes a Cu—CuO composite filler having a Cu core and a shell composed of CuO having a whisker crystal structure. The CuO having the whisker crystal structure is prepared by reacting Cu particles in a basic solution so that an outer shell thereof is grown into whisker-shaped CuO.

The present invention relates to a process for preparing high aspect ratio titanium dioxide (TiO.sub.2) nanorods using a one-pot hydrothermal technique. Reaction additives of oxalic acid and sodium hydroxide (NaOH) are used to promote the conversion of titanium dioxide precursors, preferably tetraisopropoxide (TTIP), into a one-dimensional TiO.sub.2 morphology.

There is disclosed a talc particulate having a d.sub.50 of from about 0.5 to 5.0 μm and comprising less than about 500 ppm of particles having a particle size of equal to or greater than 45 μm and a shape factor equal to or greater than about 40. A process for making the talc particulate is also disclosed. The talc particulate may be used in polymer compositions as a filler from which polymer composites and articles may be formed.

A production method for metal oxide particles includes: obtaining precursor particles of a metal oxide by performing a synthesis reaction of the precursor particles in the presence of an organic compound; and converting the obtained precursor particles into metal oxide particles by heating an aqueous solution containing the precursor particles to 300° C. or higher and pressurizing the aqueous solution at a pressure of 20 MPa or higher.

There is provided new transparent near infrared absorptive fine particles having a wide range of near infrared absorption, which are an assembly of hexaboride fine particles, wherein when a particle shape of the number of particles contained in the assembly is approximately regarded as a spheroid body, there are 20% or more and less than 80% of particles having an aspect ratio [(long axis length)/(short axis length)] of 1.5 or more and less than 5.0, and there are 20% or more and less than 80% of particles having an aspect ratio of 5.0 or more and less than 20.0.

It is one of the objects of the present disclosure to provide hexagonal prism-shaped zinc oxide particles having improved ultraviolet shielding ratio at the wavelength of 400 nm or less without impairing the direct transition properties of electronic excitation thereof and having remarkably improved ultraviolet shielding ratio for UV-B radiation and UV-A radiation; and a zinc oxide particle containing a solid solution of a Ti element and/or a Fe element and a Zn element in at least a portion thereof, and having a hexagonal prism shape.