Methods for making a multilevel core-shell structure having a core/graphene-based shell structure are described. A method for making a core/graphene-based shell structure can include obtaining a composition that includes core nano- or microstructures and graphene-based structures having at least a portion of a surface coated with a curable organic material, where the core nano- or microstructures and graphene-based structures are dispersed throughout the composition and subjecting the composition to conditions that cure the organic material and allow the graphene-based structures to self-assemble around the core nano- or microstructures to produce a core/graphene-based shell structure that has a graphene-based shell encompassing a core nano- or microstructure.

An abrasive particle having an irregular surface, wherein the surface roughness of the particle is less than about 0.95. A method for producing modified abrasive particles, including providing a plurality of abrasive particles, providing a reactive coating on said particles, heating said coated particles; and recovering modified abrasive particles.

A positive electrode material including a layered lithium- and manganese-rich nickel oxide (LMR) doped with an alkali metal and/or an alkaline earth metal. The positive electrode material may be manufactured by preparing a mixture comprising a transition metal carbonate, a dopant metal carbonate, and a lithium source, and then calcining the mixture to form the alkali metal and/or alkaline earth metal-doped LMR.

A positive electrode material for an electrochemical cell that cycles lithium ions includes a high-valent doped layered lithium- and manganese-rich nickel oxide (HVD-LMR). The high-valent dopant is a transition metal element having five or more valence electrons. The HVD-LMR positive electrode material may be manufactured by a sol-gel method, wherein a precursor solution is prepared comprising a lithium salt, a manganese salt, a nickel salt, a compound comprising the high-valent dopant, and a chelating agent. The pH of the precursor solution is controlled or adjusted to form a gel comprising a liquid phase and a solid precipitate phase, and then the liquid phase from the solid precipitate phase to form a dried gel. The dried gel is heated in an oxygen-containing environment to form the HVD-LMR positive electrode material.

An example material includes a planar layer of MFI zeolite. The planar layer has a thickness in a range between 4 nm and 10 nm for at least 70% of a basal area of the planar layer.

An electron transport includes a metal co-doped zinc oxide compound having a formula Mn.sub.xCo.sub.0.015Zn.sub.1-xO, wherein x has a value in a range of 0.001 to 0.014. The electron transport material of the present disclosure may be used in a perovskite solar cell.

An electron transport includes a metal co-doped zinc oxide compound having a formula Mn.sub.xCo.sub.0.015Zn.sub.1-xO, wherein x has a value in a range of 0.001 to 0.014. The electron transport material of the present disclosure may be used in a perovskite solar cell.

The invention relates to nanoparticles of a composite material comprising a light absorbing agent dispersed in a matrix of a mineral oxide, to a method for the preparation of such nanoparticles, to the use of said method to modify the hue of nanoparticles of composite material comprising a light absorbing agent, and to an ophthalmic lens comprising such nanoparticles.

The present invention relates to a titanium silicalite molecular sieve, wherein the crystal grain of the titanium silicalite molecular sieve has a ratio of (surface Si/Ti ratio):(bulk Si/Ti ratio) being larger than 1.1 and less than 5.

An electron transport includes a metal co-doped zinc oxide compound having a formula Mn.sub.xCo.sub.0.015Zn.sub.1-xO, wherein x has a value in a range of 0.001 to 0.014. The electron transport material of the present disclosure may be used in a perovskite solar cell.