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Fluctuation broadening in carbon nanotube resonators.

ABSTRACT: We simulated the behavior of suspended carbon nanotube resonators over a broad range of temperatures to explore the physics of semiflexible polymers in underdamped environments. We find that thermal fluctuations induce strong coupling between resonance modes. This effect leads to spectral fluctuations that readily account for the experimentally observed quality factors Q ? 100 at 300 K. Using a mean-field approach to describe fluctuations, we analytically calculate Q and frequency shifts in tensioned and buckled carbon nanotubes and find excellent agreement with simulations.

SUBMITTER: Barnard AW

PROVIDER: S-EPMC3511078 | biostudies-literature | 2012 Nov

REPOSITORIES: biostudies-literature

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Fluctuation broadening in carbon nanotube resonators.

Barnard Arthur W AW Sazonova Vera V van der Zande Arend M AM McEuen Paul L PL

Proceedings of the National Academy of Sciences of the United States of America 20121106 47

We simulated the behavior of suspended carbon nanotube resonators over a broad range of temperatures to explore the physics of semiflexible polymers in underdamped environments. We find that thermal fluctuations induce strong coupling between resonance modes. This effect leads to spectral fluctuations that readily account for the experimentally observed quality factors Q ∼ 100 at 300 K. Using a mean-field approach to describe fluctuations, we analytically calculate Q and frequency shifts in tens ...[more]

PMID: 23132940

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