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High-frequency nanotube mechanical resonators

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arxiv 1207.4874 v1 pith:4ALQEAVS submitted 2012-07-20 cond-mat.mes-hall

J. Chaste , M. Sledzinska , M. Zdrojek , J. Moser , A. Bachtold This is my paper
classification cond-mat.mes-hall
keywords high-frequencynanotuberesonatorsmechanicalnanotubesachievedallowcoefficient
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We report on a simple method to fabricate high-frequency nanotube mechanical resonators reproducibly. We measure resonance frequencies as high as 4.2 GHz for the fundamental eigenmode and 11 GHz for higher order eigenmodes. The high-frequency resonances are achieved using short suspended nanotubes and by introducing tensile stress in the nanotube. These devices allow us to determine the coefficient of the thermal expansion of an individual nanotube, which is negative and is about -0.7E-5 1/K at room temperature. High-frequency resonators made of nanotubes hold promise for mass sensing and experiments in the quantum limit.

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