Method for openly and continuously growing carbon nanomaterials

    公开(公告)号:US11473192B2

    公开(公告)日:2022-10-18

    申请号:US17285132

    申请日:2019-11-27

    摘要: The invention discloses equipment and preparation method for open and continuous growth of a carbon nanomaterial. The equipment comprises a metal foil tape feeding system, a CVD system and a collection system. The method includes continuously conveying a metal foil tape pretreated or not into the CVD system via the metal foil tape feeding system, depositing a required carbon nanomaterial on the surface of the metal foil tape by CVD, directly collecting by the collection system or directly post-treating the carbon nanomaterial by a post-treatment system, and even directly producing a end product of the carbon nanomaterial. All the systems in the invention are arranged in the open atmosphere rather than an air-isolated closed space. The invention can realize round-the-clock continuous operation to greatly improve the production efficiency of carbon nanomaterials.

    Method of making graphene structures and devices

    公开(公告)号:US11472708B2

    公开(公告)日:2022-10-18

    申请号:US16961322

    申请日:2019-01-10

    申请人: Paragraf Limited

    摘要: A method for the production of a graphene layer structure having from 1 to 100 graphene layers, the method comprising providing a substrate having a thermal resistance equal to or greater than that of sapphire, on a heated susceptor in a reaction chamber, the chamber having a plurality of cooled inlets arranged so that, in use, the inlets are distributed across the substrate and have a constant separation from the substrate, supplying a flow comprising a precursor compound through the inlets and into the reaction chamber to thereby decompose the precursor compound and form graphene on the substrate, wherein the inlets are cooled to less than 100° C., preferably 50 to 60° C., and the susceptor is heated to a temperature of at least 50° C. in excess of a decomposition temperature of the precursor, using a laser to selectively ablate graphene from the substrate, wherein the laser has a wavelength in excess of 600 nm and a power of less than 50 Watts.

    ENHANCED GRAPHENE STRUCTURE BASED ON WEAK COUPLING, GRAPHENE FILM, AND PHOTOELECTRIC DEVICE

    公开(公告)号:US20220204348A1

    公开(公告)日:2022-06-30

    申请号:US17696899

    申请日:2022-03-17

    IPC分类号: C01B32/186 H01L31/028

    摘要: A weakly coupled enhanced graphene film includes an enhanced graphene structure based on weak coupling, wherein the enhanced graphene structure based on weak coupling comprises a plurality of graphene units stacked vertically; the graphene unit is a single graphene sheet, or consists of two or more graphene sheets stacked in AB form; two vertically adjacent graphene units are weakly coupled, to promote the hot electron transition and increase the joint density of states, thereby increasing the number of hot electrons in high-energy states; the stacking direction of the graphene units in the graphene structure is in the thickness direction of the graphene film; and the graphene film enhances the accumulation of hot electrons in high-energy states by the enhanced graphene structure based on weak coupling.

    GRAPHENE WOOL AND MANUFACTURE THEREOF

    公开(公告)号:US20220088566A1

    公开(公告)日:2022-03-24

    申请号:US17310360

    申请日:2019-02-01

    摘要: The invention provides a system for manufacturing graphene wool which includes a receptacle, a graphene growth substrate locatable inside the receptacle, a heating device for increasing the temperature inside the receptacle, an inlet gas flow communication with the receptacle for controlling the introduction of gaseous substances into the receptacle, and a cooling device for rapidly decreasing the temperature inside the receptacle. The invention extends to a method for manufacturing graphene wool and to an air pollutant trap which includes: a sorbent, and a housing for housing the sorbent, wherein the sorbent includes graphene.

    Method of producing a two-dimensional material

    公开(公告)号:US11217447B2

    公开(公告)日:2022-01-04

    申请号:US16795841

    申请日:2020-02-20

    申请人: Paragraf Ltd.

    摘要: A method of producing graphene or other two-dimensional material such as graphene including heating the substrate held within a reaction chamber to a temperature that is within a decomposition range of a precursor, and that allows two-dimensional crystalline material formation from a species released from the decomposed precursor; establishing a steep temperature gradient (preferably >1000° C. per meter) that extends away from the substrate surface towards an inlet for the precursor; and introducing precursor through the relatively cool inlet and across the temperature gradient towards the substrate surface. The steep temperature gradient ensures that the precursor remains substantially cool until it is proximate the substrate surface thus minimizing decomposition or other reaction of the precursor before it is proximate the substrate surface. The separation between the precursor inlet and the substrate is less than 100 mm.