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Oct 13, 2008

Controlling carbon nanotube geometry via tuneable process parameters

Carbon nanotubes (CNTs) are ideally suited for nanoelectromechanical (NEMS) devices because of their excellent mechanical, structural, and electrical properties. CNTs have a high elastic modulus (of around 1 TPa) that gives CNT-based devices the potential to operate at high speeds (> 100 GHz). CNTs also possess a large failure strain (of around 40%) that would allow CNT-based nanomechanical devices to exhibit a wide range of motion compared to similar sized silicon-based NEMS devices. CNTs could therefore be used to improve the performance of nanoscale mechanical relays, resonators, and flexural bearings. It is important to control the stiffness of CNTs in the NEMS devices to enable CNT-based NEMS devices that perform with desired range, resolution, and bandwidth.

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