Methods of nondestructively delaminating graphene from a metal substrate
AssigneeNational University of Singapore
InventorsKian Ping Loh, Yu Wang
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Abstract
Methods of delaminating a graphene film (60) from a metal substrate (50) are disclosed that substantially preserve the metal substrate. The methods include forming a support layer (80) on the graphene film and then performing an electrochemical process in an electrochemical apparatus (10). The electrochemical process creates gas bubbles (36) at the metal-film interface (64), thereby causing the delamination. The graphene film and support layer form a structure (86) that is collected by a take-up roller (120). The support layer and graphene structure are then separated to obtain the graphene film.
Claims24
A method of removing a graphene film grown on a surface of a metal substrate, comprising:
- applying a support layer to an exposed surface of the graphene film to define a first structure having a graphene-metal interface;
- subjecting the first structure to an electrochemical process that forms gas bubbles at the graphene-metal interface, thereby causing the graphene and support layer to separate from the surface of the metal substrate as a second structure while substantially preserving the metal substrate;
- and
- processing the second structure to remove the support layer from the graphene film.
A method of removing a first graphene film from a first surface of a metal substrate on which the first graphene film has been formed, the method comprising:
- a) adding a first support layer to the first graphene film to form a first structure having an interface between the first graphene film and the first surface of the metal substrate;
- b) immersing at least a portion of the first structure in an electrolytic solution while using the first structure as a cathode, and including employing an anode in the electrolytic solution;
- and
- c) performing an electrochemical reaction by establishing an electrical potential between the anode and cathode through the electrolytic solution to cause the first graphene film and the first support layer to delaminate as a second structure from the first surface of the metal substrate while substantially preserving the metal substrate.
Dependencies are inferred from the claim text.