A fast algorithm is used to study the transient behavior due to the step-like pulse. This algorithm consists of two parts: The algorithm I reduces the computational complexity to T.sup.0N.sup.3 for large systems as long as T<N; The algorithm II employs the fast multipole technique and achieves scaling T.sup.0N.sup.3whenever T<N.sup.2 beyond which it becomes T log.sub.2 N for even longer time. Hence it is of order O(1) if T<N.sup.2. Benchmark calculation has been done on graphene nanoribbons with N=10.sup.4 and T=10.sup.8. This new algorithm allows many large scale transient problems to be solved, including magnetic tunneling junctions and ferroelectric tunneling junctions that could not be achieved before.

An apparatus having reduced phononic coupling between a graphene monolayer and a substrate is provided. The apparatus includes an aerogel substrate and a monolayer of graphene coupled to the aerogel substrate.

The present invention relates to a cell sheet manufacturing device and a manufacturing method therefor. More specifically, the present invention relates to a cell sheet manufacturing device comprising a support layer made of silicon rubber, a patterned electrode formed adjacent to the support layer and a graphene layer formed adjacent to the electrode, and a manufacturing method therefor.

A continuous method for manufacturing graphene films using a metal substrate, wherein a first surface of the metal substrate is heated such that a top layer of the first surface melts to form a molten metal layer, and devices for carrying out the same.

The disclosure provides a thermoelectric conversion structure and its use in heat dissipation device. The thermoelectric conversion structure includes a thermoelectric element, a first electrode and an electrically conductive heat-blocking layer. The thermoelectric element includes a first end and a second end opposite to each other. The first electrode is located at the first end of the thermoelectric element. The electrically conductive heat-blocking layer is between the thermoelectric element and the first electrode.

A process for the preparation of graphene includes the steps of a) providing flash thermal treatment of a graphite oxide at a temperature up to 700° C. sufficient to produce exfoliation and under inert atmosphere and b) cooling the material obtained in the previous step below 90° C. The method further includes the step of c) heating the material resulting from the previous step under inert atmosphere at a temperature which is higher than the temperature of step a), wherein the heating rate is between 1 and 15° C./min. The graphenes obtained from the process exhibit excellent physico-chemical properties.

A method of transferring functionalized graphene comprising the steps of providing graphene on a first substrate, functionalizing the graphene and forming functionalized graphene on the first substrate, delaminating the functionalized graphene from the first substrate, and applying the functionalized graphene to a second substrate.

The present invention is related to the method for producing the cathode material, cathode material and lithium-ion battery. The present invention provides the higher capacity and number of recharge cycles. The lithium battery comprises the metallic lithium anode, electrolyte and a cathode comprising metallic current collector coated with a suspension (concentration 0.1-1 g/mL) of composite material comprising V.sub.2O.sub.5 nanorods in graphene shell, dissolved in acetone.

Provided herein are graphene materials, fabrication processes, and devices with improved performance and a high throughput. In some embodiments, the present disclosure provides graphene oxide (GO) materials and methods for forming GO materials. Such methods for forming GO materials avoid the shortcomings of current forming methods, to facilitate facile, high-throughput production of GO materials.

Embodiments described herein relate generally to the large scale production of functionalized graphene. In some embodiments, a method for producing functionalized graphene includes combining a crystalline graphite with a first electrolyte solution that includes at least one of a metal hydroxide salt, an oxidizer, and a surfactant. The crystalline graphite is then milled in the presence of the first electrolyte solution for a first time period to produce a thinned intermediate material. The thinned intermediate material is combined with a second electrolyte solution that includes a strong oxidizer and at least one of a metal hydroxide salt, a weak oxidizer, and a surfactant. The thinned intermediate material is then milled in the presence of the second electrolyte solution for a second time period to produce functionalized graphene.