Efficient counter-propagating wave acoustic micro-particle manipulation

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

Research output: Contribution to journalArticle

25 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.
Original languageEnglish
Article number233501
JournalApplied Physics Letters
Volume101
Issue number23
DOIs
Publication statusPublished - 3 Dec 2012

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