Journal
APPLIED PHYSICS LETTERS
Volume 101, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4769092
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Funding
- EPSRC of the United Kingdom [EP/G012067/1]
- EPSRC [EP/G012067/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G012067/1] Funding Source: researchfish
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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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769092]
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