频率调谐螺旋声镊的三维捕获和动态轴向操纵
3D trapping and dynamic axial manipulation with frequency-tuned spiraling acoustical tweezers
摘要：
基于阿基米德-费马螺旋叉指换能器（S-IDT）的全息声镊（HAT）是用于选择性操纵微粒的通用工具[Baudoin et.例如，Sci.高级，5：eaav 1967（2019）]和细胞[Baudoin et.例如，国家通讯社，11，4244（2020）]中进行。这些二元主动全息图产生一些聚焦的螺旋波，具有在涡核处捕获粒子的能力。然而，迄今为止，使用S-IDT进行的所有研究都仅限于2D操作。在这里，我们表明（i）可以用具有足够大孔径的螺旋镊子获得微粒和细胞的3D辐射陷阱，以及（ii）可以通过简单地调整驱动频率来轴向位移颗粒，而无需换能器的任何运动。这项工作开辟了前景的3D细胞和微粒操纵单光束声镊。
英文摘要：
Holographic acoustical tweezers (HAT) based on Archimedes-Fermat spiraling InterDigitated Transducers (S-IDTs) are a versatile tool for the selective manipulation of microparticles [Baudoin et. al., Sci. Adv., 5: eaav1967 (2019)] and cells [Baudoin et. al., Nat. Commu., 11, 4244 (2020)] in a standard microfluidic environment. These binary active holograms produce some focused helical wave, with the ability to trap particles at the vortex core. Yet, all the studies conducted with S-IDTs have so far been restricted to 2D manipulation only. Here we show (i) that 3D radiation trap for microparticles and cells can be obtained with spiraling tweezers with sufficiently large aperture and (ii) that the particles can be displaced axially by simply tuning the driving frequency, without any motion of the transducer. This work opens perspectives for 3D cells and microparticles manipulation with single-beam acoustical tweezers.
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