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Solvent-free transfer of monolayer graphene with recrystallized cyclododecane

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Title
Solvent-free transfer of monolayer graphene with recrystallized cyclododecane
Author(s)
Kim, Min Jung; Moreira, Gabriel; Lisi, Nicola; Kim, Namwon; Wooyoung Shim; Lee, Gwan-Hyoung; Capasso, Andrea
Publication Date
2023-11
Journal
APPLIED PHYSICS LETTERS, v.123, no.21
Publisher
AIP Publishing
Abstract
Graphene produced by chemical vapor deposition finds applications in a wide range of technologies. However, the transfer of monolayer graphene from the native substrate (commonly Cu foils) to a desired substrate remains challenging. In this study, we report a solvent-free transfer technique for monolayer graphene using a sublimable supporting coating, cyclododecane (CDD). After spin-coating CDD on graphene grown on Cu foil, we rapidly heat the stack at 80 C-degrees to melt and recrystallize the CDD coating. The recrystallized coating top surface becomes composed of larger and interconnected CDD crystals, which form a mechanically strong coating that takes almost 2 h to sublimate completely. Having a bottom surface that closely conforms to graphene's topography, the CDD coating can effectively support graphene during the whole transfer process without compromising its structural integrity, maintaining its superior electrical and optical properties. In this way, CDD becomes capable of transferring monolayer graphene over square centimeter areas. Unlike traditional polymer-based techniques, after transfer, the CDD coating sublimates completely, without the need of any post-transfer cleaning treatment. Our work shows that the CDD coating can be an alternative transfer medium for the efficient and clean transfer of monolayer graphene. This technique paves the way for the widespread adoption of graphene in various applications, including those not compatible with solvents.
URI
https://pr.ibs.re.kr/handle/8788114/14571
DOI
10.1063/5.0169748
ISSN
0003-6951
Appears in Collections:
Center for Nanomedicine (나노의학 연구단) > 1. Journal Papers (저널논문)
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