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.

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.

The present invention provides a carbon material dispersion in which a carbon material is contained at a high concentration in a liquid medium containing an organic solvent but is unlikely to reaggregate and is stably dispersed, and from which various products, such as an ink capable of forming a coating film having excellent electric conductivity, can be formed. This carbon material dispersion contains a carbon material, an organic solvent, and a polymeric dispersant, wherein the polymeric dispersant is a polymer having 3 to 55% by mass of a constituent unit (1) represented by the following formula (1), wherein R represents a hydrogen atom or the like, A represents O or NH, B represents an ethylene group or the like, R.sub.1 and R.sub.2 each independently represent a methyl group or the like, Ar represents a phenyl group or the like, X represents a chlorine atom or the like, and p represents an arbitrary number of repeating units, and the polymeric dispersant has an amine value of 100 mgKOH/g or less and a number average molecular weight of 5,000 to 20,000.

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Disclosed is a carbon nanomaterial-based structure, including: a polymer resin layer; and a carbon nanomaterial layer stacked on the polymer substrate, wherein the carbon nanomaterial is a carbon nanomaterial doped by electron beams.

The embodiments herein provide a system and a method for the synthesis of Graphene Quantum Dots (GQDs) for use in applications like nano-electronics, photonics, bio-imaging, energy storage, quantum computing, etc. Cu substrate is placed inside the CVD tube, and the CVD Chamber is sealed. The process parameters for CVD process are set up. Precursor gases injected inside the tube are dissociated to form carbon dimers and trimmers. Upon cooling semi-crystalline carbon film deposits inside the CVD tube. Oxidizing gas mixture is injected to convert amorphous C in semi-crystalline carbon film to CO.sub.2/CO. Graphene Quantum Dots (GQDs) so formed are carried with the gas flow and deposited at the cooler end of tube. The scrapper assembly is inserted in the CVD Tube and the reagent is sprayed inside the tube to disperse these GQDs in the reagent. This dispersion is pumped out of the CVD Chamber.

The disclosure provides a preparation method for a graphene material-based resistive gas sensor array and an application method thereof. The preparation method includes: adding a metal salt solution to a graphene oxide solution to obtain a mixed suspension, adjusting a pH of the mixed suspension and dispersing the mixed suspension under ultrasound, incubating the mixed suspension on a shaker, then washing it with deionized water followed by dispersing it in a deionized water to obtain metal ion-induced graphene oxide self-assembled suspension, and preparing a plurality of parts of the suspension by varying the preparation conditions; and adding the plurality of parts of metal ion-induced graphene oxide self-assembled suspension respectively to fingers of a multi-site interdigitated electrode array, and drying naturally, reducing the plurality of parts of the suspension at 60 to 120° C. for 3 to 30 min. The disclosure achieves uniform loading of a graphene material on a substrate.

The present disclosure provides a three-dimensional hydrogel-graphene-based biosensor and a preparation method thereof, belonging to the technical field of biosensors. The present disclosure provides a three-dimensional hydrogel-graphene-based biosensor, including a substrate, an electrode layer, a graphene film, and a three-dimensional hydrogel material layer that are stacked in sequence; where the three-dimensional hydrogel material layer is formed of a hydrogel material having a three-dimensional network structure; the hydrogel material is obtained by polymerization of raw materials including an acrylamide monomer and a modified probe molecule; and the modified probe molecule is a probe molecule modified with an acrylamide group. The three-dimensional hydrogel-graphene-based biosensor has a desirable stability and a high sensitivity.

The present disclosure provides a method for preparing patterned graphene, and the method includes using a silicon carbide base as a solid-state carbon source, decomposing the silicon carbide under the action of high temperature and catalyst, to directly grow graphene on an insulating substrate. Through a first patterned trench and a second patterned trench in an accommodating passage, the pattern of the formed graphene can be directly controlled. Therefore, the present disclosure can accurately locate the position of the patterned graphene on the insulating substrate, it does not require transferring the graphene one more time, thereby avoiding contaminating the graphene and damaging its structure, and there is no need for photo-lithography, ion etching and other processes to treat the graphene in order to obtain patterned graphene, which further avoids damages to the graphene.

A method for preparing a graphene nanosheet, wherein the method includes preparing an electrode assembly comprising a negative electrode, wherein the negative electrode comprises artificial graphite, a lithium metal counter electrode opposing the negative electrode, and a separator interposed between the negative electrode and the lithium metal counter electrode, and immersing the electrode assembly in an electrolyte, electrochemically charging the immersed electrode assembly to form a charged electrode assembly, separating the artificial graphite from the charged electrode assembly to form separated artificial graphite, and de-laminating a graphene nanosheet from the separated artificial graphite, wherein the initial discharge capacity of the negative electrode is 350 mAh/g or greater, and the electrolyte comprises an organic solvent comprising a cyclic carbonate and a linear carbonate, and a lithium salt.

The present disclosure relates to production of electrodes. The present disclosure particularly relates to production of graphene based transparent conducting electrode (TCE). The disclosure provides a simple and environmental friendly process for producing said graphene based TCE by coating of graphene on a modified or non-modified substrate. Said electrode provides large area metal network with reduced non-uniformity of conducting film, visible transparency and low or reduced sheet resistance. The disclosure further relates to a graphene based transparent conductive electrode (TCE).