Acoustophoretic Contactless Elevation, Orbital Transport and Spinning of Matter in Air
Acoustophoretic Contactless Elevation, Orbital Transport and Spinning of Matter in Air
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DOI：
10.1103/physrevlett.112.024301
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发表时间：
2014-01-15
影响因子：
8.6
通讯作者：
Poulikakos, Dimos
中科院分区：
文献类型：
--
作者：
Foresti, Daniele;Poulikakos, Dimos
我们提出了声泳概念的实验演示和理论框架，可实现空气中液滴和颗粒的非接触式受控轨道运动或旋转。轨道平面与重力平行，需要声泳提升和抬高。运动（旋转、平滑或十字转门）被证明起源于声场和声势节点的时空调制。我们根据谐波声势源的叠加和粒子将自身定位在总势阱底部的固有趋势来描述基本原理。
We present the experimental demonstration and theoretical framework of an acoustophoretic concept enabling contactless, controlled orbital motion or spinning of droplets and particles in air. The orbital plane is parallel to gravity, requiring acoustophoretic lifting and elevation. The motion (spinning, smooth, or turnstile) is shown to have its origin in the spatiotemporal modulation of the acoustic field and the acoustic potential nodes. We describe the basic principle in terms of a superposition of harmonic acoustic potential sources and the intrinsic tendency of the particle to locate itself at the bottom of the total potential well.