A core-shell particle includes: a core including an iron oxyhydroxide compound represented by Formula A.sup.3.sub.a3Fe.sub.1−a3OOH (in which A.sup.3 represents at least one metal element other than Fe, and a3 satisfies 0<a3<1) or at least one iron oxide compound selected from the group consisting of Fe.sub.2O.sub.3, a compound represented by Formula A.sup.1.sub.a1Fe.sub.2−a1O.sub.3 (in which A.sup.1 represents at least one metal element other than Fe, and a1 satisfies 0<a1<2), Fe.sub.3O.sub.4, and a compound represented by Formula A.sup.2.sub.a2Fe.sub.3−a2O.sub.4 (in which A.sup.2 represents at least one metal element other than Fe, and a2 satisfies 0<a2<2); and a shell which covers the core and includes a polycondensate of a metal alkoxide.

A method of fabricating polyacrylonitrile (PACN) nanostructured carbon superstructure shapes is provided that includes forming a PACN polymer superstructure shape by using as a monomer, an initiator, and a solvent or incorporation of a different co-monomer for free radical polymerization, and converting the PACN polymer superstructure shape to a nanostructured carbon superstructure analogue using stabilization and carbonization of the PACN polymer superstructure shape, where the stabilization includes heating the PACN polymer superstructure shape to a temperature that is adequate to form a stabilization reaction, where the carbonization includes using a heat treatment.

Compositions and devices comprising MXene materials, suitable for use as selective and/or tunable infrared emitters and/or absorbers, and methods of making coatings with low thermal emissivities using coatings comprising MXene materials.

Nano-structures of Aluminum Nitride and a method of producing nano-structures of Aluminum Nitride from nut shells comprising milling agricultural nuts into a fine nut powder, milling nanocrystalline Al.sub.2O.sub.3 into a powder, mixing, pressing the fine nut powder and the powder of nanocrystalline Al.sub.2O.sub.3, heating the pellet, maintaining the temperature of the pellet at about 1400° C., cooling the pellet, eliminating the residual carbon, and forming nano-structures of AlN. An Aluminum Nitride (AlN) product made from the steps of preparing powders of agricultural nuts using ball milling, preparing powders of nanocrystalline Al.sub.2O.sub.3, mixing the powders of agricultural nuts and the powders of nanocrystalline Al.sub.2O.sub.3 forming a homogenous sample powder of agricultural nuts and Al.sub.2O.sub.3, pressurizing, pyrolizing the disk, and reacting the disk and the nitrogen atmosphere and forming AlN.

A composition includes a first portion including Ni-rich LiNi.sub.xCo.sub.γMn.sub.zO.sub.2, where 0.5<x<1, 0<y<1, 0<z<1; a second portion including Li.sub.αZr.sub.βO.sub.γ, where 0<α<9, 0<β<3, and 1<γ<10 such that the second portion is coated on the first portion, and the first portion is doped with an elemental metal selected from at least one of Zr, Si, Sn, Nb, Ta, Al, and Fe. A method of forming a composition includes mixing a metal precursor with nickel-cobalt-manganese (NCM) precursor to form a first mixture; adding a lithium-based compound to the first mixture to form a second mixture; and calcining the second mixture at a predetermined temperature for a predetermined time to form the composition.

A conductive material, and a method for preparing the same are provided. The conductive material has a structure where a plurality of graphene sheets are interconnected, wherein an oxygen content is 1 wt % or higher based on the total weight of the conductive material, and a D/G peak ratio is 2.0 or less when the Raman spectrum is measured.

Calcium hydroxide nanoparticles (Ca(OH).sub.2NPs) synthesized using carob pulp extract may be hexagonal nanoparticles with a diameter ranging from about 31.22 nm to about 81.22 nm. The Ca(OH).sub.2NPs may be synthesized by heating ethylene glycol, adding calcium hydroxide to the ethylene glycol to provide a first mixture, heating the first mixture, adding a carob pulp aqueous extract to the first mixture to form a second mixture, heating the second mixture, adding sodium hydroxide (NaOH) to the second mixture to form a third mixture, heating the third mixture, resting the third mixture at room temperature after heating, centrifuging the third mixture, collecting a colloid sediment, extracting any unwanted contaminants from the colloid sediment, and drying the colloid sediment to obtain Ca(OH).sub.2NPs.

A method for continuously mass-manufacturing graphene using thermal plasma, the method for continuously mass-manufacturing graphene includes the steps of: (a) injecting an inert gas into a plasma device to generate plasma; (b) injecting expandable graphite and graphite intercalation compounds (GIC) into the plasma device in constant amounts; and (c) allowing the expandable graphite and GIC to be expanded by thermal plasma treatment so that graphene is exfoliated.

Provided is a method of producing fine particulate barium calcium titanate in which calcium forms a homogeneous solid solution. The present invention relates to a method of producing a perovskite compound represented by the following formula (1):

Ba.sub.(1-x)A.sub.xTiO.sub.3  (1)

wherein A represents Ca or Sr, and x is a number satisfying 0.00<x≤0.30,

the method including: a first step of acid washing barium titanate to provide barium titanate having a ratio of barium element to titanium element of lower than 1.00; a second step of mixing the barium titanate obtained in the first step and a calcium salt or a strontium salt and drying the mixture to provide a dry mixture; and a third step of heating the dry mixture obtained in the second step.

Disclosed is a method for synthesizing two-dimensional (2D) silicon carbide and other materials. The method includes the use of hexagonal SiC precursor in a wet exfoliation technique. The method may also include synthesizing two-dimensional (2D) silicon carbide by a chemical vapor deposition method, or a combination of a liquid exfoliation technique and a chemical vapor deposition method.