A process for preparing stacks of metal chalcogenide flakes includes: (a) reacting together a source of the metal atom of the target metal chalcogenide with a source of the chalcogenide atom of the target metal chalcogenide, in the presence of a spacer, so as to produce flakes of the metal chalcogenide; (b) depositing metal chalcogenide flakes obtained using step (a) onto a substrate to form a stack of assembled metal chalcogenide flakes, wherein the spacer contains an alkyl chain linked to a functional group able to bond to the metal chalcogenide surface, said alkyl chain having a length of less than 18 carbon atoms, preferably between 6 and 14 carbon atoms.

A device for measuring a light radiation pressure is provided which includes a torsion balance, a laser, a convex lens, and a line array detector. The laser is configured to emit a first laser beam. The convex lens is located on an optical path of the first laser beam and configured to focus the first laser beam to a surface of the reflector. The line array detector is configured to detect a reflected first laser beam reflected by the reflector. The disclosure also provides a method for measuring the light radiation pressure using the device.

An LFP electrode material is provided which has improved impedance, power during cold cranking, rate capacity retention, charge transfer resistance over the current LFP based cathode materials. The electrode material comprises crystalline primary particles and secondary particles, where the primary particle is formed from a plate-shaped single-phase spheniscidite precursor and a lithium source. The LFP includes an LFP phase behavior where the LFP phase behavior includes an extended solid-solution range.

Preparation of two-dimensional indium selenide, other two-dimensional materials and related compositions via surfactant-free deoxygenated co-solvent systems.

The present invention is directed to methods of preparing metal sulfide, metal selenide, or metal sulfide/selenide nanoparticles and the products derived therefrom. In various embodiments, the nanoparticles are derived from the reaction between precursor metal salts and certain sulfur- and/or selenium-containing precursors each independently having a structure of Formula (I), (II), or (III), or an isomer, salt, or tautomer thereof, where Q.sup.1,Q.sup.2,Q.sup.3,R.sup.1,R.sup.2,R.sup.3,R.sup.5, and X are defined within the specification.

The disclosure relates to an electronic beam machining system. The system includes a vacuum chamber; an electron gun located in the vacuum chamber and used to emit electron beam; a holder located in the vacuum chamber and used to fix an object; a control computer; and a diffraction unit located in the vacuum chamber; the diffraction unit includes a two-dimensional nanomaterial; the electron beam transmits the two-dimensional nanomaterial to form a transmission electron beam and a plurality of diffraction electron beams; the transmission electron beam and the plurality of diffraction electron beams radiate the object to form a transmission spot and a plurality of diffraction spots.

The present disclosure relates to a carbon-based nanomaterial composition that may be formed from a gas mixture. The gas mixture may include acetylene gas at a molar ratio AG.sub.mol/GM.sub.mol of at least about 0.55 and not greater than about 0.99, oxygen gas at a molar ratio OG.sub.mol/GM.sub.mol of at least about 0.01 and not greater than about 0.75, and hydrogen gas at a molar ratio HG.sub.mol/GM.sub.mol of at least about 0.05 and not greater than about 0.90. The carbon-based nanomaterial composition may have a carbon hybridization ratio P.sub.sp3/P.sub.sp2 of at least about 0.0 and not greater than about 5.0, where P.sub.sp3 is the percent of carbon within the carbon-based nanomaterial composition having a sp3 hybridization and P.sub.sp2 is the percent of carbon within the carbon-based nanomaterial composition having a sp2 hybridization.

The present disclosure relates to a carbon-based nanomaterial composition that may be formed from a gas mixture. The gas mixture may include acetylene gas at a molar ratio AG.sub.mol/GM.sub.mol of at least about 0.25 and not greater than about 0.99, oxygen gas at a molar ratio OG.sub.mol/GM.sub.mol of at least about 0.01 and not greater than about 0.50, hydrogen gas at a molar ratio HG.sub.mol/GM.sub.mol of at least about 0.05 and not greater than about 0.70, and methane gas at a molar ratio MG.sub.mol/GM.sub.mol of at least about 0.25 and not greater than about 0.99. The carbon-based nanomaterial composition may have a carbon hybridization ratio P.sub.sp3/P.sub.sp2 of at least about 0.0 and not greater than about 5.0, where P.sub.sp3 is the percent of carbon within the carbon-based nanomaterial composition having a sp3 hybridization and P.sub.sp2 is the percent of carbon within the carbon-based nanomaterial composition having a sp2 hybridization.

Methods of producing graphene nanoplatelets by exposing graphite to a medium to form a dispersion of graphite in the medium. In some embodiments, the exposing results in formation of graphene nanoplatelets from the graphite. In some embodiments, the medium includes the following components: (a) an acid; (b) a dehydrating agent; and (c) an oxidizing agent. In some embodiments, the methods of the present disclosure result in the formation of graphene nanoplatelets at a yield of more than 90%. In some embodiments, the methods of the present disclosure result in the formation of graphene nanoplatelets in bulk quantities that are more than about a 1 kg of graphene nanoplatelets. Additional embodiments of the present disclosure pertains to the formed graphene nanoplatelets. In some embodiments, the graphene nanoplatelets include a plurality of layers, such as from about 1 layer to about 100 layers.

The present invention is directed to methods of transferring urea from an aqueous solution comprising urea to a MXene composition, the method comprising contacting the aqueous solution comprising urea with the MXene composition for a time sufficient to form an intercalated MXene composition comprising urea.