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Science 26 January 2007:
Vol. 315. no. 5811, pp. 490 - 493
DOI: 10.1126/science.1136836
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Reports

Electromechanical Resonators from Graphene Sheets

J. Scott Bunch,1 Arend M. van der Zande,1 Scott S. Verbridge,1 Ian W. Frank,2 David M. Tanenbaum,2 Jeevak M. Parpia,1 Harold G. Craighead,1 Paul L. McEuen1*

Nanoelectromechanical systems were fabricated from single- and multilayer graphene sheets by mechanically exfoliating thin sheets from graphite over trenches in silicon oxide. Vibrations with fundamental resonant frequencies in the megahertz range are actuated either optically or electrically and detected optically by interferometry. We demonstrate room-temperature charge sensitivities down to 8 x 10–4 electrons per root hertz. The thinnest resonator consists of a single suspended layer of atoms and represents the ultimate limit of two-dimensional nanoelectromechanical systems.

1 Cornell Center for Materials Research, Cornell University, Ithaca, NY 14853, USA.
2 Pomona College, Department of Physics, Claremont, CA 91711, USA.

* To whom correspondence should be addressed. E-mail: mceuen{at}ccmr.cornell.edu

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