Independent trapping and manipulation of microparticles using dexterous acoustic tweezers

C.R.P. Courtney, C.E.M. Demore, H. Wu, A. Grinenko, P.D. Wilcox, S. Cochran, B.W. Drinkwater

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An electronically controlled acoustic tweezer was used to demonstrate two acoustic manipulation phenomena: superposition of Bessel functions to allow independent manipulation of multiple particles and the use of higher-order Bessel functions to trap particles in larger regions than is possible with first-order traps. The acoustic tweezers consist of a circular 64-element ultrasonic array operating at 2.35MHz which generates ultrasonic pressure fields in a millimeter-scale fluid-filled chamber. The manipulation capabilities were demonstrated experimentally with 45 and 90-lm-diameter polystyrene spheres. These capabilities bring the dexterity of acoustic tweezers substantially closer to that of optical tweezers.
Original languageEnglish
Article number154103
Pages (from-to)1-4
Number of pages4
JournalApplied Physics Letters
Issue number15
Early online date14 Apr 2014
Publication statusPublished - 30 Apr 2014


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