Robust acoustic particle manipulation: A thin-reflector design for moving particles to a surface

Existing ultrasonic manipulation devices capable of pushing particles to a surface ("quarter-wave" devices) have significant potential in sensor applications. A configuration for achieving this that uses the first thickness resonance of a layered structure with both a thin reflector layer...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2009-09, Vol.126 (3), p.EL75-EL79
Main Authors: GLYNNE-JONES, P, BOLTRYK, R. J, HILL, M, HARRIS, N. R, BACLET, P
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Mechanical engineering. Machine design
Precision engineering, watch making
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Summary:Existing ultrasonic manipulation devices capable of pushing particles to a surface ("quarter-wave" devices) have significant potential in sensor applications. A configuration for achieving this that uses the first thickness resonance of a layered structure with both a thin reflector layer and thin-fluid layer is described here. Crucially, this mode is efficient with lossy reflector materials such as polymers, produces a more uniform acoustic radiation force at the reflector, and is less sensitive to geometric variations than previously described quarter-wave devices. This design is thus expected to be suitable for mass produced, disposable devices.
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3186800