Patent ID: 9216559
Filing Date: 2015-12-22
Classification: B32B,B82Y,C01B,C25B,C25F

Abstract:
1. A low-cost and damage-free graphene transfer process, characterized in that, the method utilizes graphene on an initial substrate the method utilizes an initial substrate having a surface on which the graphene is synthesized or coated, wherein the initial substrate is adapted for use as an electrode to undergo an electrolysis process through which gas bubbles are generated on the surface of the initial substrate to provide a combination effect of moving action and intercalation action to separate the graphene on the surface of the initial substrate from the initial substrate without causing any damaging effect on the graphene, wherein the graphene separated from the initial substrate is damage-free and is capable of binding onto a surface of a target substrate, wherein the method comprises the steps of: (1) coating a transfer medium layer onto the graphene on the surface of the initial substrate in which the transfer medium is coated onto the graphene on the initial substrate defining a composite layer of the transfer medium and the graphene for preventing damage to the graphene in subsequent processing, wherein the graphene is grown or is coated onto the surface of the initial substrate; (2) separating the composite layer of the transfer medium and the graphene from the initial substrate in which the initial substrate with the composite layer of transfer medium and graphene is placed into an electrolyte solution and is used as an electrode such that gaseous substances is generated on the surface of the initial substrate by an electrolysis process and the composite layer of the transfer medium and the graphene is separated from the initial substrate through the combination effect of moving action and intercalation action of the gaseous substances, therefore the graphene of the composite layer is separated without damages; (3) binding the composite layer of the transfer medium and the graphene to the target substrate by a direct contact method through placing the composite layer of the transfer medium and the graphene onto the target substrate; and (4) removing the transfer medium by dissolution with solvent or by heating to remove the transfer medium on an outer surface of the graphene.