Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields

Courtney, C. R. P., Drinkwater, B. W., Demore, C. E. M., Cochran, S. , Grinenko, A. and Wilcox, P. D. (2014) Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields. Applied Physics Letters, 102(12), 123508. (doi: 10.1063/1.4798584)

Abstract

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Cochran, Professor Sandy
• Authors: Courtney, C. R. P., Drinkwater, B. W., Demore, C. E. M., Cochran, S., Grinenko, A., and Wilcox, P. D.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Applied Physics Letters
• Publisher: AIP Publishing
• ISSN: 0003-6951
• ISSN (Online): 1077-3118