Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields

被引：140

作者：

Courtney, Charles R. P. ^{[1
]}

Drinkwater, Bruce W. ^{[1
]}

Demore, Christine E. M. ^{[2
]}

Cochran, Sandy ^{[2
]}

Grinenko, Alon ^{[1
]}

Wilcox, Paul D. ^{[1
]}

机构：

[1] Univ Bristol, Dept Mech Engn, Bristol BS8 1TR, Avon, England

[2] Univ Dundee, Inst Med Sci & Technol, Sch Med, Dundee DD2 1FD, Scotland

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

RADIATION FORCE; STANDING WAVES; CELLS; PARTICLES; BEAM; TRANSDUCER; SEPARATION; TWEEZERS; SPHERE; DEVICE;

D O I：

10.1063/1.4798584

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that Bessel-function acoustic pressure fields can be used to trap and controllably position microparticles. A circular, 16-element ultrasound array generates and manipulates an acoustic field within a chamber, trapping microparticles and agglomerates. Changes in the phase of the sinusoidal signals applied to the array elements result in the movement of the Bessel-function pressure field and hence the microparticles. This demonstrates ultrasonic manipulation analogous to holographic optical tweezers. The manipulation limits of the device are explained by the existence of unwanted resonances within the manipulation chamber. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798584]

引用

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