Manipulation of microparticles using phase-controllable ultrasonic standing waves

C. 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

    58 Citations (Scopus)

    Abstract

    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 mu m polystyrene particles are trapped and moved in one dimension through 140 mu m. (C) 2010 Acoustical Society of America

    Original languageEnglish
    Pages (from-to)EL195-EL199
    Number of pages5
    JournalJournal of the Acoustical Society of America
    Volume128
    Issue number4
    DOIs
    Publication statusPublished - Oct 2010

    Keywords

    • Particle

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