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Nanotechnology. 2011 Feb 4;22(5):055204. doi: 10.1088/0957-4484/22/5/055204. Epub 2010 Dec 23.

SWNT array resonant gate MOS transistor.

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NanoLab, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.


We show that thin horizontal arrays of single wall carbon nanotubes (SWNTs) suspended above the channel of silicon MOSFETs can be used as vibrating gate electrodes. This new class of nano-electromechanical system (NEMS) combines the unique mechanical and electronic properties of SWNTs with an integrated silicon-based motion detection. Its electrical response exhibits a clear signature of the mechanical resonance of SWNT arrays (120-150 MHz) showing that these thin horizontal arrays behave as a cohesive, rigid and elastic body membrane with a Young's modulus in the order of 1-10 GPa and ultra-low mass. The resonant frequency can be tuned by the gate voltage and its dependence is well understood within the continuum mechanics framework.

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