Array-controlled ultrasonic manipulation of particles in planar acoustic resonator

Peter Glynne-Jones (Lead / Corresponding author), Christine E. M. Demore (Lead / Corresponding author), Congwei Ye, Yongqiang Qiu, Sandy Cochran, Martyn Hill

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    66 Citations (Scopus)

    Abstract

    Ultrasonic particle manipulation tools have many promising applications in life sciences, expanding on the capabilities of current manipulation technologies. In this paper, the ultrasonic manipulation of particles and cells along a microfluidic channel with a piezoelectric array is demonstrated. An array integrated into a planar multilayer resonator structure drives particles toward the pressure nodal plane along the centerline of the channel, then toward the acoustic velocity maximum centered above the subset of elements that are active. Switching the active elements along the array moves trapped particles along the microfluidic channel. A 12-element 1-D array coupled to a rectangular capillary has been modeled and fabricated for experimental testing. The device has a 300-mu m-thick channel for a half-wavelength resonance near 2.5 MHz, with 500 mu m element pitch. Simulation and experiment confirm the expected trapping of particles at the center of the channel and above the set of active elements. Experiments demonstrated the feasibility of controlling the position of particles along the length of the channel by switching the active array elements.

    Original languageEnglish
    Pages (from-to)1258-1266
    Number of pages9
    JournalIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
    Volume59
    Issue number6
    DOIs
    Publication statusPublished - Jun 2012

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