Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields

Charles R P Courtney, Bruce W. Drinkwater*, Christine E M Demore, Sandy Cochran, Alon Grinenko, Paul D. Wilcox

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

100 Citations (Scopus)

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. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4798584]

Original languageEnglish
Article number123508
Number of pages5
JournalApplied Physics Letters
Volume102
Issue number12
DOIs
Publication statusPublished - 25 Mar 2013

Keywords

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

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