Independent trapping and manipulation of microparticles using dexterous acoustic tweezers

Charles R. P. Courtney*, Christine E. M. Demore, Hongxiao Wu, Alon Grinenko, Paul D. Wilcox, Sandy Cochran, Bruce W. Drinkwater

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

122 Citations (Scopus)

Abstract

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 2.35 MHz which generates ultrasonic pressure fields in a millimeter-scale fluid-filled chamber. The manipulation capabilities were demonstrated experimentally with 45 and 90-mu m-diameter polystyrene spheres. These capabilities bring the dexterity of acoustic tweezers substantially closer to that of optical tweezers. (C) 2014 AIP Publishing LLC.

Original languageEnglish
Article number154103
Number of pages4
JournalApplied Physics Letters
Volume104
Issue number15
DOIs
Publication statusPublished - 14 Apr 2014

Keywords

  • ULTRASONIC STANDING WAVES
  • RADIATION FORCE
  • BESSEL BEAM
  • PARTICLES
  • SPHERE
  • CELLS

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