Disclosed herein are graphene coatings characterized by a porous, three-dimensional, spherical structure having a hollow core, along with methods for forming such graphene coatings on glasses, glass-ceramics, ceramics, and crystalline materials. Such coatings can be further coated with organic or inorganic layers and are useful in chemical and electronic applications.

Disclosed herein are graphene coatings characterized by a porous, three-dimensional, spherical structure having a hollow core, along with methods for forming such graphene coatings on glasses, glass-ceramics, ceramics, and crystalline materials. Such coatings can be further coated with organic or inorganic layers and are useful in chemical and electronic applications.

Systems and method for producing graphene on a substrate are described. Certain types of exemplar systems include lateral arrangements of a substrate gas scavenging environment and an annealing environment. Certain other types of exemplar systems include lateral arrangements of a graphene producing environment and a cooling environment, which cools the graphene produced on the substrate. Yet other types of exemplar systems include lateral arrangements of a localized annealing environment, localized graphene producing environment and a localized cooling environment inside the same enclosure.

Certain type of exemplar methods for producing graphene on a substrate include scavenging a first portion of the substrate and preferably, contemporaneously annealing a second portion of the substrate. Certain other type of exemplar methods for producing graphene include novel annealing techniques and/or implementing temperature profiles and gas flow rate profiles that vary as a function of lateral distance and/or cooling graphene after producing it.

A method for the manufacture of pristine graphite from Kish graphite including three different steps A, B and C; the pristine obtained with among others a high amount of carbon atoms, i.e. a pristine graphene having a high purity; and the use of this pristine graphene.

A method for the manufacture of pristine graphite from Kish graphite including three different steps A, B and C; the pristine obtained with among others a high amount of carbon atoms, i.e. a pristine graphene having a high purity; and the use of this pristine graphene.

Provided are a 2-dimensional microporous graphene and a method for preparing the same. The 2-dimensional microporous graphene has an average pore size of about 0.1 nm to about 2 nm, interpore spacing of about 0.3 nm to about 10 nm, and a standard deviation of the interpore spacing of less than or equal to about 5 nm.

Provided are a 2-dimensional microporous graphene and a method for preparing the same. The 2-dimensional microporous graphene has an average pore size of about 0.1 nm to about 2 nm, interpore spacing of about 0.3 nm to about 10 nm, and a standard deviation of the interpore spacing of less than or equal to about 5 nm.

A process for sizing two-dimensional nanostructures includes providing the nanostructures to a liquid-liquid interface, providing probe particles to the liquid-liquid interface, obtaining an image of the nanostructures and the probe particles, and processing the image to ascertain a size property of the nanostructures.

A process for sizing two-dimensional nanostructures includes providing the nanostructures to a liquid-liquid interface, providing probe particles to the liquid-liquid interface, obtaining an image of the nanostructures and the probe particles, and processing the image to ascertain a size property of the nanostructures.

A graphene foam-protected selenium cathode layer for an alkali metal-selenium cell, comprising: (a) a sheet or a roll of solid graphene foam composed of multiple pores and pore walls containing graphene sheets, wherein the graphene sheets contain a pristine graphene material having less than 0.01% by weight of non-carbon elements or a non-pristine graphene material having 0.01% to 20% by weight of non-carbon elements, wherein said non-pristine graphene is selected from graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, boron-doped graphene, nitrogen-doped graphene, chemically functionalized graphene, or a combination thereof, wherein the graphene sheets are interconnected or chemically merged together without an adhesive resin; and (b) selenium coating or particles residing in the pores or bonded to the pore walls of the solid graphene foam.