AIP Conference Proceedings
AIP Conference Proceedings
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DOI：
10.1063/1.3703298
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发表时间：
2012-05
期刊：
影响因子：
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通讯作者：
C. Courtney;C. Ong;B. Drinkwater;P. Wilcox;A. Grinenko
中科院分区：
文献类型：
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作者：
C. Courtney;C. Ong;B. Drinkwater;P. Wilcox;A. Grinenko
作为生物科学研究工具，捕获并操纵流体中的微粒的能力引起了人们的兴趣。应用包括组织工程、颗粒分选和改善与生物传感器的对准。本文涉及使用相位可控反向传播超声波来生成驻波，其压力节点的位置由反向传播行波分量的相对相位确定。由于致密（相对于流体）颗粒被迫到达压力场中的节点，这使得颗粒被捕获在特定点并移动到任意位置。反向传播的波是使用成对的相对换能器产生的，这些换能器经过匹配和支持以最大限度地减少反射。使用一对换能器可以在一维上捕获和操纵粒子。使用两对正交放置的换能器并适当调整相对相位，可以实现二维捕获和操作。特...
The ability to trap, and then manipulate, micro-particles in a fluid, is of interest as a research tool in the biosciences. Applications include tissue engineering, particle sorting and improving alignment with bio-sensors. This paper relates to the use of phase-controllable counter-propagating ultrasonic waves to generate a standing wave with pressure nodes whose positions are determined by the relative phases of the component counter-propagating travelling waves. As dense (relative to the fluid) particles are forced to nodes in the pressure field this allows particles to be trapped at particular points and moved to arbitrary positions. Counter-propagating waves are generated using pairs of opposing transducers, matched and backed to minimise reflection. Using one pair of transducers allows particles to be trapped and manipulated in one dimension. Using two pairs of transducers, positioned orthogonally, and adjusting the relative phases appropriately, allows trapping and manipulation in two dimensions. T...