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Issue 17, 2017
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Coupling graphene nanomechanical motion to a single-electron transistor

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Graphene-based electromechanical resonators have attracted great interest recently because of the outstanding mechanical and electrical properties of graphene and their various applications. However, the coupling between mechanical motion and charge transport has not been explored in graphene. Herein, we studied the mechanical properties of a suspended 50 nm wide graphene nanoribbon, which also acts as a single-electron transistor (SET) at low temperatures. Using the SET as a sensitive detector, we found that the resonance frequency could be tuned from 82 MHz to 100 MHz and the quality factor exceeded 30 000. The strong charge-mechanical coupling was demonstrated by observing the SET induced ∼140 kHz resonance frequency shifts and mechanical damping. We also found that the SET can enhance the nonlinearity of the resonator. Our SET-coupled graphene mechanical resonator could approach an ultra-sensitive mass resolution of ∼0.55 × 10−21 g and a force sensitivity of ∼1.9 × 10−19 N (Hz)−1/2, and can be further improved. These properties indicate that our device is a good platform for both fundamental physical studies and potential applications.

Graphical abstract: Coupling graphene nanomechanical motion to a single-electron transistor

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The article was received on 20 Dec 2016, accepted on 22 Mar 2017 and first published on 24 Mar 2017

Article type: Paper
DOI: 10.1039/C6NR09768E
Citation: Nanoscale, 2017,9, 5608-5614
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    Coupling graphene nanomechanical motion to a single-electron transistor

    G. Luo, Z. Zhang, G. Deng, H. Li, G. Cao, M. Xiao, G. Guo and G. Guo, Nanoscale, 2017, 9, 5608
    DOI: 10.1039/C6NR09768E

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