Nano Research

, Volume 5, Issue 10, pp 710–717

Characteristics and effects of diffused water between graphene and a SiO2 substrate

  • Mi Jung Lee
  • Jin Sik Choi
  • Jin-Soo Kim
  • Ik-Su Byun
  • Duk Hyun Lee
  • Sunmin Ryu
  • Changgu Lee
  • Bae Ho Park
Research Article

DOI: 10.1007/s12274-012-0255-9

Cite this article as:
Lee, M.J., Choi, J.S., Kim, JS. et al. Nano Res. (2012) 5: 710. doi:10.1007/s12274-012-0255-9
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Abstract

The graphene/SiO2 system is a promising building block for next-generation electronic devices, integrating the high electromagnetic performance of graphene with the mature technology of Si-based electronic devices. It is well known that the electromagnetic performance of graphene/SiO2 is dramatically reduced by structural defects, such as wrinkles and folding, which are suspected to result from water droplets. Therefore, understanding water diffusion between graphene and SiO2 is required for controlling structural defects and thus improving the electromagnetic performance of this system. Although the behavior of water between graphene and atomically flat mica has been investigated, the characteristics and effects of diffused water between graphene and SiO2 remain unidentified. We have investigated water diffusion between monolayer graphene and SiO2 under high humidity conditions using atomic force microscopy. For a relative humidity of over 90%, water diffuses into graphene/SiO2 and forms an ice-like structure up to two layers thick. Liquid-like water can further diffuse in, stacking over the ice-like layer and evaporating relatively easily in the air causing graphene to wrinkle and fold. By similarly investigating water diffusion between graphene and mica, we argue that water-induced wrinkle formation depends on the hydrophilicity and roughness of the substrate.

Keywords

Graphene water diffusion ice-like structure high humidity wrinkle SiO2 mica hydrophilicity 

Supplementary material

12274_2012_255_MOESM1_ESM.pdf (465 kb)
Supplementary material, approximately 465 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Mi Jung Lee
    • 1
  • Jin Sik Choi
    • 1
  • Jin-Soo Kim
    • 1
  • Ik-Su Byun
    • 1
  • Duk Hyun Lee
    • 1
  • Sunmin Ryu
    • 2
  • Changgu Lee
    • 3
  • Bae Ho Park
    • 1
  1. 1.Division of Quantum Phases & Devices, Department of PhysicsKonkuk UniversitySeoulKorea
  2. 2.Department of Applied ChemistryKyung Hee UniversityYongin, GyeonggiKorea
  3. 3.Department of Mechanical EngineeringSungkyunkwan UniversitySuwonKorea

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