Holographic acoustic elements for manipulation of levitated objects.
Holographic acoustic elements for manipulation of levitated objects.
复制标题
DOI：
10.1038/ncomms9661
复制
发表时间：
2015-10-27
影响因子：
16.6
通讯作者：
Subramanian S
中科院分区：
文献类型：
--
作者：
Marzo A;Seah SA;Drinkwater BW;Sahoo DR;Long B;Subramanian S
声音能够使不同大小和材质的物体在空气、水和组织中悬浮。这使我们能够在不接触或污染细胞、液体、化合物或生物的情况下对它们进行操作。然而，声悬浮技术以往需要将目标物体用声学元件包围起来，或者其可操作性有限。在此，我们优化了用于驱动超声相控阵的相位，并表明声悬浮甚至可以使用单面发射器来平移、旋转和操纵粒子。此外，我们引入了全息声学元件框架，它能够快速生成陷阱，并在光学捕获和声捕获之间架起一座桥梁。形状像镊子、扭转器或瓶子的声学结构成为牵引光束或无容器运输的最佳机制。单束悬浮可在体内操纵粒子，应用于靶向药物递送或不受磁共振成像干扰的声控微型机器。
声波可用于使物体在空气、水和组织中悬浮。在此，作者引入了一种单束方案，以促进悬浮物体在三维空间中的平移、旋转和操纵，并设计了诸如镊子、扭转器和瓶状陷阱等声学结构。
Sound can levitate objects of different sizes and materials through air, water and tissue. This allows us to manipulate cells, liquids, compounds or living things without touching or contaminating them. However, acoustic levitation has required the targets to be enclosed with acoustic elements or had limited manoeuvrability. Here we optimize the phases used to drive an ultrasonic phased array and show that acoustic levitation can be employed to translate, rotate and manipulate particles using even a single-sided emitter. Furthermore, we introduce the holographic acoustic elements framework that permits the rapid generation of traps and provides a bridge between optical and acoustical trapping. Acoustic structures shaped as tweezers, twisters or bottles emerge as the optimum mechanisms for tractor beams or containerless transportation. Single-beam levitation could manipulate particles inside our body for applications in targeted drug delivery or acoustically controlled micro-machines that do not interfere with magnetic resonance imaging. Acoustic waves can be used to levitate objects in air, water and tissue. Here, the authors introduce a single-beam scheme to facilitate the translation, rotation and manipulation of levitated objects in 3D, and design acoustic structures such as tweezers, twisters and bottle traps.