Nanofluidics of Single-Crystal Diamond Nanomechanical Resonators.
Single-crystal diamond nanomechanical resonators are being developed for countless applications. A number of these applications require that the resonator be operated in a fluid, that is, a gas or a liquid. Here, we investigate the fluid dynamics of single-crystal diamond nanomechanical resonators in the form of nanocantilevers. First, we measure the pressure-dependent dissipation of diamond nanocantilevers with different linear dimensions and frequencies in three gases, He, N2, and Ar. We observe that a subtle interplay between the length scale and the frequency governs the scaling of the fluidic dissipation. Second, we obtain a comparison of the surface accommodation of different gases on the diamond surface by analyzing the dissipation in the molecular flow regime. Finally, we measure the thermal fluctuations of the nanocantilevers in water and compare the observed dissipation and frequency shifts with theoretical predictions. These findings set the stage for developing diamond nanomechanical resonators operable in fluids.
Department of Mechanical Engineering, Division of Materials Science and Engineering, and the Photonics Center, Boston University , Boston, Massachusetts 02215, United States.
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Kara
Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States.
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Sohn
Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States.
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Atikian
Department of Mechanical Engineering, Division of Materials Science and Engineering, and the Photonics Center, Boston University , Boston, Massachusetts 02215, United States.
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Yakhot
Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 02138, United States.
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Lončar
Department of Mechanical Engineering, Division of Materials Science and Engineering, and the Photonics Center, Boston University , Boston, Massachusetts 02215, United States.
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Ekinci
NEMS; diamond; nanofluidics; nanomechanics; surface accommodation