A quantum dot structure, a radiation conversion element and a light emitting device are disclosed. In an embodiment a quantum dot structure includes an active region configured to emit radiation, a barrier region surrounding the active region and a trap region spaced apart from the active region, wherein a band edge of the trap region forms a trap configuration with respect to the barrier region for at least one type of charge carrier.

The present disclosure relates to a standalone precursor for synthesizing nanomaterials, which is capable of effectively mass-producing nanomaterials, and an apparatus for synthesizing nanomaterials using the same.

The present disclosure provides a cathode material, a method for preparing the cathode material and a lithium ion battery. The method comprises: performing a first sintering treatment on a lithium source material and a cathode precursor material to obtain a first sintered product; and coating a surface of the first sintered product with a coating agent and then performing a second sintering treatment to obtain the cathode material, wherein the coating agent is a nickel source material and/or a manganese source material. The method can reduce side reactions in an electrolyte and particles, improve the cyclic retention ratio and prolong the service of the battery without losing the circulation capacity while simplifying a synthetic process, reducing the energy consumption, improving the yield, canceling a water washing process and reducing residual lithium.

In some aspects and embodiments, the present application provides a wide range of porous 1-D polymeric graphitic carbon-nitride materials that are atomically doped with binary metals in different morphologies. In some embodiments, the graphitic carbon-nitride materials can be prepared with high mass production from inexpensive and natural abundant precursors. In some embodiments, the materials were used successfully for the oxidation of CO to CO.sub.2 under ambient reaction temperature in addition to the reduction of CO.sub.2 into hydrocarbons. In some embodiments, the materials can be used for practical and large-scale gas conversion for household or industrial applications.

In some aspects and embodiments, the present application provides a wide range of porous 1-D polymeric graphitic carbon-nitride materials that are atomically doped with binary metals in different morphologies. In some embodiments, the graphitic carbon-nitride materials can be prepared with high mass production from inexpensive and natural abundant precursors. In some embodiments, the materials were used successfully for the oxidation of CO to CO.sub.2 under ambient reaction temperature in addition to the reduction of CO.sub.2 into hydrocarbons. In some embodiments, the materials can be used for practical and large-scale gas conversion for household or industrial applications.

A quantum dot structure, a radiation conversion element and a light emitting device are disclosed. In an embodiment a quantum dot structure includes an active region configured to emit radiation, a barrier region surrounding the active region and a trap region spaced apart from the active region, wherein a band edge of the trap region forms a trap configuration with respect to the barrier region for at least one type of charge carrier.

A method is disclosed of assembling building blocks into supraparticles. The method includes applying a first solvent on a template of patterned recessed regions to wet surfaces of the recessed regions; applying a second solvent on the template of patterned recessed regions, the building blocks suspended in the second solvent; wherein the first solvent and the second solvent are partially miscible, resulting in negligible interfacial surface tension between the first and second solvents; and wherein droplets of the second solvent diffuse droplets of the first solvent in the recessed regions, thereby assembling the building blocks into the supraparticles in the recessed regions.

In some aspects and embodiments, the present application provides a wide range of porous 1-D polymeric graphitic carbon-nitride materials that are atomically doped with binary metals in different morphologies. In some embodiments, the graphitic carbon-nitride materials can be prepared with high mass production from inexpensive and natural abundant precursors. In some embodiments, the materials were used successfully for the oxidation of CO to CO.sub.2 under ambient reaction temperature in addition to the reduction of CO.sub.2 into hydrocarbons. In some embodiments, the materials can be used for practical and large-scale gas conversion for household or industrial applications.

The present disclosure provides that a catalyst exhibits excellent catalytic activity in both a hydrogenation involving a hydrogen-storing body containing an aromatic compound, and a dehydrogenation involving a hydrogen-supplying body containing a hydrogen derivative of the aromatic compound, wherein the catalyst contains a nanocrystalline composite having two or more accumulated flake-like nanocrystalline pieces in a connected state, the flake-like nanocrystalline pieces each having a main surface and an end surface, and in that the nanocrystalline composite is configured such that, when two adjacent nanocrystalline pieces are viewed, an end surface of at least one of the nanocrystalline pieces is connected.

The present invention discloses a method for synthesizing graphene by eliminating one or more functional groups from a 1D carbon allotropes of graphene having a lattice structure selected from an orthorhombic system, a monoclinic system, and a triclinic system. The present invention discloses a method for synthesizing graphene by eliminating one or more functional groups from a network of one or more 1D nanostructures having a lattice structure formed by an asymmetric structural unit (CxHyF) where x=6, or 7, 3<=y<=9 and F is one or more functional group.