High-Frequency Nanofluidics: An Experimental Study using Nanomechanical Resonators

Abstract

Here we apply nanomechanical resonators to the study of oscillatory fluid dynamics. A high-resonance-frequency nanomechanical resonator generates a rapidly oscillating flow in a surrounding gaseous environment; the nature of the flow is studied through the flow-resonator interaction. Over the broad frequency and pressure range explored, we observe signs of a transition from Newtonian to non-Newtonian flow at $\omega \tau \approx 1$, where $\tau$ is a properly defined fluid relaxation time. The obtained experimental data appears to be in close quantitative agreement with a theory that predicts purely elastic fluid response as $\omega \tau \to \infty$.

References in corpus (2)

• Measurement of Resonant Frequency and Quality Factor of Microwave Resonators: Comparison of Methods
• The stochastic dynamics of nanoscale mechanical oscillators immersed in a viscous fluid

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