Electromechanical resonators from graphene sheets.
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.
Bunch
J Scott
JS
Cornell Center for Materials Research, Cornell University, Ithaca, NY 14853, USA.
van der Zande
Arend M
AM
Verbridge
Scott S
SS
Frank
Ian W
IW
Tanenbaum
David M
DM
Parpia
Jeevak M
JM
Craighead
Harold G
HG
McEuen
Paul L
PL