4.8 Article

Tuning of nanotube mechanical resonances by electric field pulling

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PHYSICAL REVIEW LETTERS
卷 89, 期 27, 页码 -

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AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.89.276103

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We show here that field emission (FE) can be used to directly observe the vibration resonances nu(R) of carbon nanotubes (CNTs) and that the tension created by the applied field allows the tuning of these resonances by up to a factor of 10. The resonances are observable by the changes they create in the FE pattern or the emitted FE current. The tuning is shown to be linear in voltage and to follow from the basic physics of stretched strings. The method allows one to study the mechanical properties of individual multiwall carbon nanotubes within an ensemble and follow their evolution as the CNTs are modified. The tuning and detection should be useful for nanometric resonant devices.

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