Method for transferring graphene nondestructively with low cost

摘要

A method for transferring graphene nondestructively and at a low cost. In the method, a graphene is used whose surface is coated with transferring media and whose original substrate is an electrode, the electrode is placed into an electrolyte, and the graphene is separated from the original substrate by means of the driving force of bubbles and the gas intercalation produced on the graphene electrode surface during electrolysis. Then, the graphene coated with transferring media is nondestructively combined with a target substrate. The transferring media is removed so as to transfer the graphene to the target substrate nondestructively. The transferring method results in no damage or loss with respect to the graphene and the original substrate, and the original substrate can be re-used. Furthermore, the method is easy to perform, works quickly, is easy to control, and is pollution-free.

主权项

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.