Manipulation of microparticles using phase-controllable ultrasonic standing waves

Charles R. P. Courtney, C.-K. Ong, B. W. Drinkwater, P. D. Wilcox, C. Demore, S. Cochran, P. Glynne-jones, M. Hill

Research output: Contribution to journalArticlepeer-review

72 Citations (SciVal)


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 μm polystyrene particles are trapped and moved in one dimension through 140 μm.
Original languageEnglish
Pages (from-to)EL195-EL199
Number of pages5
JournalJournal of the Acoustical Society of America
Issue number4
Early online date9 Sept 2010
Publication statusPublished - Oct 2010


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