Breaking the Rate‐Integrity Dilemma in Large‐Area Bubbling Transfer of Graphene by Strain Engineering

Abstract

AbstractEfficient electrochemical bubbling delamination is highly promising for realizing the scalable transfer of high‐quality chemical vapor deposition (CVD) graphene film. However, it remains a challenge to significantly improve the low delamination rate of large‐area graphene without causing structural damage. Here, a strain‐engineering strategy is reported to break this rate‐integrity dilemma by introducing appreciable compressive strain into graphene to dramatically accelerate the delamination of CVD graphene from Cu foil in a non‐destructive manner. An astonishing 25‐fold improvement in the delamination rate is achieved by hot bubbling graphene coated with a post‐cured UV‐epoxy adhesive. Meanwhile, the inherent structural integrity of delaminated graphene films is well preserved. The strategy is superior to the prevalent methods by simultaneously realizing the unprecedented high‐rate delamination and intact transfer. It is further demonstrated that it allows the highly efficient roll‐to‐roll bubbling transfer of meter‐scale high‐quality graphene films.