Manipulation of microparticles using phase-controllable ultrasonic standing waves

A method of manipulating microparticles in a liquid using ultrasound is proposed and demonstrated. An ultrasonic standing wave with nodal planes whose positions are controllable by varying the relative phase of two applied sinusoidal signals is generated using a pair of acoustically matched piezoele...

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Bibliographic Details
Published in:The Journal of the Acoustical Society of America 2010-10, Vol.128 (4), p.EL195-EL199
Main Authors: Courtney, C. R. P., Ong, C.-K., Drinkwater, B. W., Wilcox, P. D., Demore, C., Cochran, S., Glynne-Jones, P., Hill, M.
Format: Article
Language:English
Subjects:
Acoustics
Biological and medical sciences
Biotechnology
Fundamental and applied biological sciences. Psychology
Immobilization techniques
Liquids
Methods. Procedures. Technologies
Microparticles
Models, Theoretical
Motion
Particle Size
Piezoelectric transducers
Polystyrene resins
Polystyrenes
Stability
Standing waves
Transducers
Ultrasonics - instrumentation
Ultrasound
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Summary:A method of manipulating microparticles in a liquid using ultrasound is proposed and demonstrated. An ultrasonic standing wave with nodal planes whose positions are controllable by varying the relative phase of two applied sinusoidal signals is generated using a pair of acoustically matched piezoelectric transducers. The resulting acoustic radiation force is used to trap micron scale particles at a series of arbitrary positions (determined by the relative phase) and then move them in a controlled manner. This method is demonstrated experimentally and 5   μ m polystyrene particles are trapped and moved in one dimension through 140   μ m .
ISSN:0001-4966
1520-8524
DOI:10.1121/1.3479976