Abstract: A risk control system for traffic devices includes a light emitting device, a processing element and a user prompting element. The processing element is electrically connected with the light emitting device, and outputs a prompt signal. The user prompting element is electrically connected with the processing element, and receives the prompt signal.

Abstract: The present invention relates to a method for transferring two-dimensional nanomaterials. The method comprises the following steps: S1, providing a first substrate and a two-dimensional nanomaterial layer on a surface of the first substrate; S2, covering the two-dimensional nanomaterial layer with a carbon nanotube film structure; S3, obtaining a composite structure comprising the two-dimensional nanomaterial layer and the carbon nanotube film structure by removing the first substrate with a corrosion solution; S4, cleaning the composite structure by placing the composite structure on a surface of a cleaning solution; S5, picking up the composite structure from the cleaning solution with a target substrate, by contacting the target substrate with the two-dimensional nanomaterial layer of the composite structure; and S6, removing the carbon nanotube film structure from the composite structure.

Abstract: The present invention relates to a method for transferring two-dimensional nanomaterials.

Abstract: The present invention relates to a method for transferring two-dimensional nanomaterials.

Abstract: The present invention relates to a transmission electron microscope (TEM) micro-grid and a method for preparing the TEM micro-grid. The TEM micro-grid comprises a porous silicon nitride substrate and a graphene layer located on a surface of the porous silicon nitride substrate. The porous silicon nitride substrate comprises a plurality of through holes. The graphene layer covers the plurality of through holes. The method for preparing the TEM micro-grid provided in the present disclosure uses a carbon nanotube film structure to transfer a graphene layer to a surface of a porous silicon nitride substrate.

Abstract: The present invention relates to a method for transferring two-dimensional nanomaterials. The method comprises the following steps: S1, providing a first substrate and a two-dimensional nanomaterial layer on a surface of the first substrate; S2, covering the two-dimensional nanomaterial layer with a carbon nanotube film structure; S3, obtaining a composite structure comprising the two-dimensional nanomaterial layer and the carbon nanotube film structure by removing the first substrate with a corrosion solution; S4, cleaning the composite structure by placing the composite structure on a surface of a cleaning solution; S5, picking up the composite structure from the cleaning solution with a target substrate, by contacting the target substrate with the two-dimensional nanomaterial layer of the composite structure; and S6, removing the carbon nanotube film structure from the composite structure.

Abstract: The present invention relates to a method for transferring two-dimensional nanomaterials.

Abstract: The present invention relates to a method for transferring two-dimensional nanomaterials.

Abstract: The present invention relates to a transmission electron microscope (TEM) micro-grid and a method for preparing the TEM micro-grid. The TEM micro-grid comprises a porous silicon nitride substrate and a graphene layer located on a surface of the porous silicon nitride substrate. The porous silicon nitride substrate comprises a plurality of through holes. The graphene layer covers the plurality of through holes. The method for preparing the TEM micro-grid provided in the present disclosure uses a carbon nanotube film structure to transfer a graphene layer to a surface of a porous silicon nitride substrate.