| 초록 |
Ni has been widely used as the metal catalyst for graphene growth in chemical vapor deposition (CVD), due to its advantages of controllable thickness and low cost. For the transfer of such large-area graphene films onto a target substrate, conventional methods use acid wet etching to remove the metal substrate from graphene, which is cost-ineffective as a new Ni catalyst is required for every graphene growth. In this study, we have developed a dry transfer method to delaminate graphene films simply using polymer adhesives. By increasing the adhesive binding force to be larger than the binding force between graphene and Ni, the entire graphene film can be easily delaminated mechanically. Also, the Ni catalyst substrate is intact due to the absence of a metal etchant. This allows the recycled use of Ni catalysts for multiple graphene growth cycles, and graphene films can be repeatedly transferred to various substrates from a single catalyst using this method. |
