High-Yield Etching-Free Transfer of Graphene: A Fracture Mechanics Approach
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Transfer is the critical issue of producing high-quality and scalable graphene electronic devices. However, conventional transfer processes require the removal of an underlying metal layer by wet etching process, which inducessignificant economic and environmental problems. We propose the etching-free mechanical releasing of graphene usingpolymer adhesives. A fracture mechanics approach was introduced to understand the releasing mechanism and ensure highyieldprocess. It is shown that the thickness of adhesive and target substrate affect the transferability of graphene. Basedon experimental and fracture mechanics simulation results, we further observed that compliant adhesives can reduce theadhesive stress during the transfer, which also enhances the success probability of graphene transfer.
Abstract
Transfer is the critical issue of producing high-quality and scalable graphene electronic devices. However, conventional transfer processes require the removal of an underlying metal layer by wet etching process, which inducessignificant economic and environmental problems. We propose the etching-free mechanical releasing of graphene usingpolymer adhesives. A fracture mechanics approach was introduced to understand the releasing mechanism and ensure highyieldprocess. It is shown that the thickness of adhesive and target substrate affect the transferability of graphene. Basedon experimental and fracture mechanics simulation results, we further observed that compliant adhesives can reduce theadhesive stress during the transfer, which also enhances the success probability of graphene transfer.
참고문헌 (30)
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