超声贝塞尔光束中的微粒捕获
Microparticle trapping in an ultrasonic Bessel beam.
作者信息
Choe Youngki, Kim Jonathan W, Shung K Kirk, Kim Eun Sok
出版信息
Appl Phys Lett. 2011 Dec 5;99(23):233704-2337043. doi: 10.1063/1.3665615. Epub 2011 Dec 8.
Abstract
This paper describes an acoustic trap consisting of a multi-foci Fresnel lens on 127 μm thick lead zirconate titanate sheet. The multi-foci Fresnel lens was designed to have similar working mechanism to an Axicon lens and generates an acoustic Bessel beam, and has negative axial radiation force capable of trapping one or more microparticle(s). The fabricated acoustic tweezers trapped lipid particles ranging in diameter from 50 to 200 μm and microspheres ranging in diameter from 70 to 90 μm at a distance of 2 to 5 mm from the tweezers without any contact between the transducer and microparticles.
摘要
本文描述了一种声学陷阱，它由一个位于127μm厚的锆钛酸铅薄片上的多焦点菲涅耳透镜组成。该多焦点菲涅耳透镜的设计工作机制与轴棱锥透镜相似，可产生声贝塞尔光束，并且具有能够捕获一个或多个微粒的负轴向辐射力。所制作的声镊在距离镊子2至5mm处捕获了直径范围为50至200μm的脂质颗粒以及直径范围为70至90μm的微球，且换能器与微粒之间没有任何接触。
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