Efficient counter-propagating wave acoustic micro-particle manipulation

A. Grinenko*, C. K. Ong, C. R P Courtney, P. D. Wilcox, B. W. Drinkwater

*Corresponding author for this work

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

27 Citations (Scopus)

Abstract

A simple acoustic system consisting of a pair of parallel singe layered piezoelectric transducers submerged in a fluid used to form standing waves by a superposition of two counter-propagating waves is reported. The nodal positions of the standing wave are controlled by applying a variable phase difference to the transducers. This system was used to manipulate polystyrene micro-beads trapped at the nodal positions of the standing wave. The demonstrated good manipulation capability of the system is based on a lowering of the reflection coefficient in a narrow frequency band near the through-thickness resonance of the transducer plates. © 2012 American Institute of Physics.

Original languageEnglish
Article number233501
Number of pages3
JournalApplied Physics Letters
Volume101
Issue number23
DOIs
Publication statusPublished - 3 Dec 2012

Keywords

  • ULTRASONIC STANDING WAVES
  • PARTICLES
  • FORCE

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