Acoustofluidic particle steering

Dina Shona Laila, Peter Glynne-Jones, Zaid Shaglwf, Martyn Hill, Bjorn Hammarstrom

Research output: Contribution to journalArticle

Abstract

Steering micro objects using acoustic radiation forces is challenging for several reasons: resonators tend to create fixed force distributions that depend primarily on device geometry, and even when using switching schemes, the forces are hard to predict a-priori. In this paper an active approach is developed that measures forces from a range of acoustic resonances during manipulation using a computer controlled feedback loop based in MATLAB, with a microscope camera for particle imaging. The arrangement uses a planar resonator where the axial radiation force is used to hold particles within a levitation plane. Manipulation is achieved by summing the levitation frequency with an algorithmically chosen second resonance frequency, which creates lateral forces derived from gradients in the kinetic energy density of the acoustic field. Apart from identifying likely resonances, the system does not require a-priori knowledge of the structure of the acoustic force field created by each resonance. Manipulation of 10 µm microbeads is demonstrated over 100s µm. Manipulation times are of order 10 seconds for paths of 200 µm length. The microfluidic device used in this work is a rectangular glass capillary with a 6 mm wide and 300 µm high fluid chamber.
LanguageEnglish
Pages(In-press)
JournalThe Journal of the Acoustical Society of America
Volume(In-press)
StateAccepted/In press - 28 Jan 2019

Fingerprint

manipulators
levitation
resonators
force distribution
acoustic resonance
acoustics
microfluidic devices
sound waves
field theory (physics)
flux density
chambers
kinetic energy
cameras
microscopes
gradients
glass
fluids
radiation
geometry

Cite this

Laila, D. S., Glynne-Jones, P., Shaglwf, Z., Hill, M., & Hammarstrom, B. (Accepted/In press). Acoustofluidic particle steering. The Journal of the Acoustical Society of America, (In-press), (In-press).

Acoustofluidic particle steering. / Laila, Dina Shona; Glynne-Jones, Peter; Shaglwf, Zaid; Hill, Martyn; Hammarstrom, Bjorn.

In: The Journal of the Acoustical Society of America, Vol. (In-press), 28.01.2019, p. (In-press).

Research output: Contribution to journalArticle

Laila, DS, Glynne-Jones, P, Shaglwf, Z, Hill, M & Hammarstrom, B 2019, 'Acoustofluidic particle steering' The Journal of the Acoustical Society of America, vol. (In-press), pp. (In-press).
Laila DS, Glynne-Jones P, Shaglwf Z, Hill M, Hammarstrom B. Acoustofluidic particle steering. The Journal of the Acoustical Society of America. 2019 Jan 28;(In-press):(In-press).
Laila, Dina Shona ; Glynne-Jones, Peter ; Shaglwf, Zaid ; Hill, Martyn ; Hammarstrom, Bjorn. / Acoustofluidic particle steering. In: The Journal of the Acoustical Society of America. 2019 ; Vol. (In-press). pp. (In-press)
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