High-frequency nanofluidics: An experimental study using nanomechanical resonators
High-frequency nanofluidics: An experimental study using nanomechanical resonators
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DOI：
10.1103/physrevlett.98.254505
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发表时间：
2007-06-22
影响因子：
8.6
通讯作者：
Ekinci, K. L.
中科院分区：
文献类型：
--
作者：
Karabacak, D. M.;Yakhot, V.;Ekinci, K. L.
在这里，我们应用纳米机械谐振器的振荡流体动力学的研究。一个高谐振频率的纳米机械谐振器产生一个快速振荡流在周围的气体环境中的流动的性质进行了研究，通过流动谐振器的相互作用。在探索的宽频率和压力范围内，我们观察到在ω τ近似为1时从牛顿流到非牛顿流的转变的迹象，其中τ是适当定义的流体弛豫时间。所获得的实验数据似乎与预测纯弹性流体响应为ω τ->无穷大的理论在定量上接近一致。
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 approximate to 1, where tau is a properly defined fluid relaxation time. The obtained experimental data appear to be in close quantitative agreement with a theory that predicts a purely elastic fluid response as omega tau ->infinity.