Clean and less defective transfer of monolayer graphene by floatation in hot water

Ji Weon Kim, Ju Yeon Woo, Sunghwan Jo, Jun Ho Oh, Woonggi Hong, Byung Chul Lee, Hyun June Jung, Jae Hyun Kim, Sung Cheoul Roh, Chang Soo Han

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Monolayer graphene grown by chemical vapor deposition has been intensively studied for applications such as transparent conductive films, electronic devices, sensors, molecular barriers, and electrodes. However, technology to transfer monolayer graphene from metal film must be improved through environmentally friendly and non-defective methods on arbitrary target substrates. Here, we report a clean and direct method for transferring monolayer graphene from Cu foil without defects and over a large area. In a water bath at 90–95 °C, we floated Cu foil with graphene on the water surface. After 5 h, a Cu2O layer formed uniformly at the interface between the graphene and the Cu. Subsequently, the monolayer graphene on the Cu foil was delaminated from the thermal release tape, releasing the graphene to the target substrate (SiO2/Si and PET). The Cu2O formation and defect changes were monitored at each step via various characterization methods. The Cu2O layer was uniformly established and no defects were generated after the transfer. Finally, we fabricated a graphene field effect transistor that exhibited an excellent electronic performance.

Original languageEnglish
Article number145057
JournalApplied Surface Science
Publication statusPublished - 2020 Apr 1


  • Floating
  • Hot water
  • Less defective
  • Monolayer graphene
  • Transfer

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces


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