The present specification relates to a preparation method for rod-shaped molybdenum oxide and a preparation method for a molybdenum oxide composite, the preparation method for rod-shaped molybdenum oxide according to the present invention may be carried out under low temperature and pressure conditions, and thus has an advantage in that it is possible to mass produce rod-shaped molybdenum oxide, and the preparation method for a molybdenum oxide composite according to the present invention has an advantage in that the molybdenum oxide composite may be synthesized at a temperature which is equal to or less than the boiling point of ethanol, and the amount of an ethanol solvent used is reduced.

It is an object of the present disclosure to provide a method for inexpensively producing a high-performance barium sulfate powder which is obtained by using inexpensive barium sulfide as a raw material, has a high whiteness degree, and can suppress the generation of volatile components.

A method for producing a barium sulfate powder comprising a step of heat treating a raw barium sulfate powders obtained by using barium sulfide as a raw material at 600 to 1300° C., wherein a retention time X (minutes) at a heat treatment temperature of t ° C. is more than time expressed by the following general formula:

X (minutes)=A×10.sup.6×e.sup.(−0.015×t)

A is 8 or more, and an upper limit of X is 3000 minutes in the formula.

Monodisperse particles having: a single pure crystalline phase of a rare earth-containing lattice, a uniform three-dimensional size, and a uniform polyhedral morphology are disclosed. Due to their uniform size and shape, the monodisperse particles self assemble into superlattices. The particles may be luminescent particles such as down-converting phosphor particles and up-converting phosphors. The monodisperse particles of the invention have a rare earth-containing lattice which in one embodiment may be an yttrium-containing lattice or in another may be a lanthanide-containing lattice. The monodisperse particles may have different optical properties based on their composition, their size, and/or their morphology (or shape). Also disclosed is a combination of at least two types of monodisperse particles, where each type is a plurality of monodisperse particles having a single pure crystalline phase of a rare earth-containing lattice, a uniform three-dimensional size, and a uniform polyhedral morphology; and where the types of monodisperse particles differ from one another by composition, by size, or by morphology. In a preferred embodiment, the types of monodisperse particles have the same composition but different morphologies. Methods of making and methods of using the monodisperse particles are disclosed.

New methods and assays for multiplexed detection of analytes using phosphors that are uniform in morphology, size, and composition based on their unique optical lifetime signatures are described herein. The described assays and methods can be used for imaging or detection of multiple unique chemical or biological markers simultaneously in a single assay readout.

An electromagnetic wave absorbing laminated transparent base material includes a plurality of sheets of transparent base materials; and an electromagnetic wave absorbing particle dispersoid including at least electromagnetic wave absorbing particles and a thermoplastic resin. The electromagnetic wave absorbing particles contain hexagonal tungsten bronze having oxygen deficiency. The tungsten bronze is expressed by a general formula: M.sub.xWO.sub.3−y (where one or more elements M include at least one or more species selected from among K, Rb, and Cs, 0.15≤x≤0.33, and 0<y≤0.46). Oxygen vacancy concentration N.sub.V in the electromagnetic wave absorbing particles is greater than or equal to 4.3×10.sup.14 cm.sup.−3 and less than or equal to 8.0×10.sup.21 cm.sup.−3. The electromagnetic wave absorbing particle dispersoid is arranged between the plurality of sheets of the transparent base materials.

The present disclosure provides a positive electrode active material which can impart an excellent low temperature output characteristic to a nonaqueous electrolyte secondary battery, and can suppress an increase in resistance after cycle charging and discharging. The positive electrode active material herein disclosed includes a core part including a lithium transition metal composite oxide, and a coating part including a titanium-containing compound on at least a partial surface of the core part. The coating part includes brookite type TiO.sub.2 and a lithium titanium (LiTi) composite oxide including lithium (Li) and titanium (Ti) as titanium-containing compounds, and at least part of titanium (Ti) of the titanium-containing compound is incorporated in a solid solution in the surface of the core part.

An object of the present invention is to provide zirconium oxide nanoparticles that have excellent dispersibility in a polar solvent and are capable of increasing a core concentration in a dispersion liquid. Zirconium oxide nanoparticles according to the present invention are coated with at least one compound selected from the group consisting of R.sup.1—COOH, (R.sup.1O).sub.3-n—P(O)—(OH).sub.n, (R.sup.1).sub.3-n—P(O)—(OH).sub.n, (R.sup.1O)—S(O)(O)—(OH), R.sup.1—S(O)(O)—(OH), and (R.sup.1).sub.4-m—Si(R.sup.4).sub.m, wherein R.sup.1 represents a group comprising a carbon atom and at least one element selected from the group consisting of an oxygen atom, a nitrogen atom, and a sulfur atom, and having the total number of carbon atoms, oxygen atoms, nitrogen atoms, and sulfur atoms of 8 or less; R.sup.4 represents a halogen atom or —OR.sup.2, and R.sup.2 represents a hydrogen atom or an alkyl group; and n represents 1 or 2, and m represents an integer of 1 to 3.

Semiconductor structures having a nanocrystalline core and corresponding nanocrystalline shell and insulator coating, wherein the semiconductor structure includes an anisotropic nanocrystalline core composed of a first semiconductor material, and an anisotropic nanocrystalline shell composed of a second, different, semiconductor material surrounding the anisotropic nanocrystalline core. The anisotropic nanocrystalline core and the anisotropic nanocrystalline shell form a quantum dot. An insulator layer encapsulates the nanocrystalline shell and anisotropic nanocrystalline core.

Electromagnetic wave absorbing particles are provided that include hexagonal tungsten bronze having oxygen deficiency, wherein the tungsten bronze is expressed by a general formula: M.sub.xWO.sub.3-y(where one or more elements M include at least one or more species selected from among K, Rb, and Cs, 0.15≤x≤0.33, and 0<y≤0.46), and wherein oxygen vacancy concentration N.sub.v in the electromagnetic wave absorbing particles is greater than or equal to 3×10.sup.14 cm.sup.−3 and less than or equal to 8.0×10.sup.21 cm.sup.−3.

A surface modified electrode, and methods for preparing the surface modified electrode for use in an electrochemical sensor for detection of an analyte is described. The surface modified electrode includes a copper oxide (CuO) co-doped tin dioxide (SnO.sub.2) nano-spikes disposed over a gold-plated chip. The surface modified electrode further includes a polymer matrix (nafion) configured to bind the gold-plated chip with the copper oxide (CuO) co-doped tin dioxide (SnO.sub.2) nano-spikes. The present disclosure also relates to a process of preparing the surface modified electrode. The surface modified electrode of the present disclosure can be used in electrochemical sensors for detection of analytes, like 4-nitrophenol (4-NP).