Monatomic chemical-vapor-deposited graphene membranes bridge a half-millimeter-scale gap

Choong Kwang Lee, Yun Hwangbo, Sang Min Kim, Seoung Ki Lee, Seung Mo Lee, Seong Su Kim, Kwang Seop Kim, Hak Joo Lee, Byung Ik Choi, Chang Kyu Song, Jong Hyun Ahn, Jae Hyun Kim

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


One of the main concerns in nanotechnology is the utilization of nanomaterials in macroscopic applications without losing their extreme properties. In an effort to bridge the gap between the nano- and macroscales, we propose a clever fabrication method, the inverted floating method (IFM), for preparing freestanding chemical-vapor-deposited (CVD) graphene membranes. These freestanding membranes were then successfully suspended over a gap a half-millimeter in diameter. To understand the working principle of IFM, high-speed photography and white light interferometry were used to characterize and analyze the deformation behaviors of the freestanding graphene membranes in contact with a liquid during fabrication. Some nanoscale configurations in the macroscopic graphene membranes were able to be characterized by simple optical microscopy. The proposed IFM is a powerful approach to investigating the macroscopic structures of CVD graphene and enables the exploitation of freestanding CVD graphene for device applications.

Original languageEnglish
Pages (from-to)2336-2344
Number of pages9
JournalACS Nano
Issue number3
Publication statusPublished - 2014 Mar 25

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)


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