Nano Research

, Volume 6, Issue 7, pp 485–495

Electrical and mechanical performance of graphene sheets exposed to oxidative environments

  • Mario Lanza
  • Yan Wang
  • Teng Gao
  • Albin Bayerl
  • Marc Porti
  • Montserrat Nafria
  • Yangbo Zhou
  • Guangyin Jing
  • Yanfeng Zhang
  • Zhongfan Liu
  • Dapeng Yu
  • Huiling Duan
Research Article

DOI: 10.1007/s12274-013-0326-6

Cite this article as:
Lanza, M., Wang, Y., Gao, T. et al. Nano Res. (2013) 6: 485. doi:10.1007/s12274-013-0326-6

Abstract

Graphene coatings have been shown to protect the underlying material from oxidation when exposed to different media. However, the passivating properties of graphene in air at room temperature, which corresponds to the operating conditions of many electronic devices, still remain unclear. In this work, we analyze the oxidation kinetics of graphene/Cu samples in air at room temperature for long periods of time (from 1 day to 113 days) using scanning electron microscopy, conductive atomic force microscopy and Auger electron microscopy, and we compare the results with those obtained for similar samples treated in H2O2. We observe that unlike the graphene sheets exposed to H2O2, in which the accumulation of oxygen at the graphene domain boundaries evolves in a very controlled and progressive way, the local oxidation of graphene in air happens in a disordered manner. In both cases the oxide hillocks formed at the graphene domain boundaries can propagate to the domains until reaching a limiting width and height. Our results demonstrate that the local oxidation of the underlying material along the domain boundaries can dramatically decrease the roughness, conductivity, mechanical resistance and frictional characteristics of the graphene sheet, which reduces the performance of the whole device.

Keywords

graphene local oxidation domain boundary passivating layer 

Supplementary material

12274_2013_326_MOESM1_ESM.pdf (628 kb)
Supplementary material, approximately 628 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Mario Lanza
    • 1
  • Yan Wang
    • 2
  • Teng Gao
    • 3
  • Albin Bayerl
    • 4
  • Marc Porti
    • 4
  • Montserrat Nafria
    • 4
  • Yangbo Zhou
    • 5
  • Guangyin Jing
    • 6
  • Yanfeng Zhang
    • 3
  • Zhongfan Liu
    • 3
  • Dapeng Yu
    • 5
  • Huiling Duan
    • 1
  1. 1.State Key Laboratory for Turbulence and Complex System, Department of Mechanics and Aerospace Engineering, CAPT, College of EngineeringPeking UniversityBeijingChina
  2. 2.Beijing Aeronautical Science and Technology Research InstituteBeijingChina
  3. 3.Center for Nanochemistry (CNC), Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijingChina
  4. 4.Electronic Engineering DepartmentUniversitat Autonoma de BarcelonaCerdanyola del VallesSpain
  5. 5.Department of Physics, State Key Laboratory for Mesoscopic PhysicsPeking UniversityBeijingChina
  6. 6.Physics DepartmentNorthwest UniversityXi’anChina

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