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J. Vac. Sci. Technol. B 25, 2558 (2007); http://dx.doi.org/10.1116/1.2789446 (4 pages)

Mechanical properties of suspended graphene sheets

I. W. Frank1, D. M. Tanenbaum1, A. M. van der Zande2, and P. L. McEuen2

1Pomona College, Department of Physics and Astronomy, Claremont, California 91711
2Cornell Center for Materials Research, Cornell University, Ithaca, New York 14853

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(Published online 11 December 2007)

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Using an atomic force microscope, we measured effective spring constants of stacks of graphene sheets (less than 5) suspended over photolithographically defined trenches in silicon dioxide. Measurements were made on layered graphene sheets of thicknesses between 2 and 8 nm, with measured spring constants scaling as expected with the dimensions of the suspended section, ranging from 1 to 5 N/m. When our data are fitted to a model for doubly clamped beams under tension, we extract a Young’s modulus of 0.5 TPa, compared to 1 TPa for bulk graphite along the basal plane, and tensions on the order of 10−7N.

© 2007 American Vacuum Society

ACKNOWLEDGMENTS

The authors would like to thank the NSF for support through the Cornell Center for Materials Research, the Cornell Center for Nanoscale Systems, and the Cornell NanoScale Facility, a member of the National Nanotechnology Infrastructure Network. Additionally the authors would like to thank Leon Bellan, Scott Bunch, Scott Verbridge, Scott Berkley, Jeevak Parpia, and Harold Craighead for helpful discussions and support.

Article Outline

  1. INTRODUCTION
  2. BACKGROUND
  3. FABRICATION AND YIELD
  4. STATIC DEFLECTION MEASUREMENTS
  5. DISCUSSION
  6. CONCLUSION

KEYWORDS and PACS

PACS

  • 81.40.Jj

    Elasticity and anelasticity, stress-strain relations

  • 62.20.D-

    Elasticity

  • 68.60.Bs

    Mechanical and acoustical properties

  • 62.25.-g

    Mechanical properties of nanoscale systems

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PUBLICATION DATA

ISSN

1071-1023 (print)  
1520-8567 (online)

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