Improving the read-out of the resonance frequency of nanotube mechanical resonators

J. Schwender, I. Tsioutsios, A. Tavernarakis, Quan Dong, Yong Jin, Urs Staufer, A. Bachtold

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
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Abstract

We report on an electrical detection method of ultrasensitive carbon nanotube mechanical resonators. The noise floor of the detection method is reduced using a RLC resonator and an amplifier based on a high electron mobility transistor cooled at 4.2 K. This allows us to resolve the resonance frequency of nanotube resonators with an unprecedented quality. We show that the noise of the resonance frequency measured at 4.2 K is limited by the resonator itself, and not by the imprecision of the measurement. The Allan deviation reaches ∼10-5 at 125 ms integration time. When comparing the integration time dependence of the Allan deviation to a power law, the exponent approaches ∼1/4. The Allan deviation might be limited by the diffusion of particles over the surface of the nanotube. Our work holds promise for mass spectrometry and surface science experiments based on mechanical nano-resonators.

Original languageEnglish
Article number063104
Number of pages4
JournalApplied Physics Letters
Volume113
Issue number6
DOIs
Publication statusPublished - 2018

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