TY - JOUR

T1 - Micro-Acoustic-Trap (µAT) for microparticle assembly in 3D

AU - Vyas, Varun

AU - Lemieux, Michael

AU - Knecht, David A.

AU - Kolosov, O.V.

AU - Huey, Bryan D.

N1 - This is the author’s version of a work that was accepted for publication in Ultrasonics Sonochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ultrasonics Sonochemistry, 57, 193-202, 2019 DOI: 10.1016/j.ultsonch.2019.05.010

PY - 2019/10/1

Y1 - 2019/10/1

N2 - Acoustic tweezers facilitate the manipulation of objects using sound waves. With the current state of the technology one can only control mobility for a single or few microparticles. This article presents a state of the art system where an Acoustic Lens was used for developing a Micro-Acoustic Trap for microparticle assembly in 3D. The model particles, 2 µm diameter polystyrene beads in suspension, were driven via acoustic pressure to form a monolayer at wavelength-defined distances above the substrate defined by the focal point of an Acoustic Lens The transducer was driven at 89 MHz, mixed with 100 ms pulses at a repetition rate of 2 Hz. Beyond a threshold drive amplitude sufficient to overcome Brownian motion, this led to 2D assembly of the microparticles into close-packed rafts >80 µm across (∼5 wavelengths of the carrier wave and >40 particles across). This methodology was further extended to manipulation of live Dictyostelium discoideum amoebae. This approach therefore offers maneuverability in controlling or assembling micrometer-scale objects using continuous or pulsed focused acoustic radiation pressure.

AB - Acoustic tweezers facilitate the manipulation of objects using sound waves. With the current state of the technology one can only control mobility for a single or few microparticles. This article presents a state of the art system where an Acoustic Lens was used for developing a Micro-Acoustic Trap for microparticle assembly in 3D. The model particles, 2 µm diameter polystyrene beads in suspension, were driven via acoustic pressure to form a monolayer at wavelength-defined distances above the substrate defined by the focal point of an Acoustic Lens The transducer was driven at 89 MHz, mixed with 100 ms pulses at a repetition rate of 2 Hz. Beyond a threshold drive amplitude sufficient to overcome Brownian motion, this led to 2D assembly of the microparticles into close-packed rafts >80 µm across (∼5 wavelengths of the carrier wave and >40 particles across). This methodology was further extended to manipulation of live Dictyostelium discoideum amoebae. This approach therefore offers maneuverability in controlling or assembling micrometer-scale objects using continuous or pulsed focused acoustic radiation pressure.

KW - 2D microparticle Array

KW - Acoustic Lens

KW - Acoustic Trap

KW - Acoustic Tweezers

KW - Acoustofluidics

KW - Dictyostelium discoideum (Amoebae)

KW - Acoustic imaging

KW - Acoustic radiators

KW - Atmospheric pressure

KW - Brownian movement

KW - Protozoa

KW - Pulse repetition rate

KW - Acoustic pressures

KW - Acoustic radiation pressure

KW - Acoustic tweezers

KW - Dictyostelium discoideum

KW - Microparticle arrays

KW - Microparticle assemblies

KW - State-of-the-art system

KW - Suspensions (fluids)

U2 - 10.1016/j.ultsonch.2019.05.010

DO - 10.1016/j.ultsonch.2019.05.010

M3 - Journal article

VL - 57

SP - 193

EP - 202

JO - Ultrasonics Sonochemistry

JF - Ultrasonics Sonochemistry

SN - 1350-4177

ER -