Interactive manipulation of microparticles in an octagonal sonotweezer

Bernassau, A.L.; Courtney, C. R. P.; Beeley, James; Drinkwater, Bruce W.; Cumming, David R. S.

doi:10.1063/1.4802754

Cited by 51 publications

(41 citation statements)

References 14 publications

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“…It is inspired by, and closely resembles, the experimental systems in Refs. [9,10,[30][31][32]. The radius of these chambers is typically around 1 mm, and the chambers may have between 8 and 64 transducer elements operating at MHz frequency.…”

Section: Model Systemsmentioning

confidence: 99%

Acoustic Tweezing and Patterning of Concentration Fields in Microfluidics

Karlsen

Bruus

2017

Phys. Rev. Applied

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We demonstrate theoretically that acoustic forces acting on inhomogeneous fluids can be used to pattern and manipulate solute concentration fields into spatiotemporally controllable configurations stabilized against gravity. A theoretical framework describing the dynamics of concentration fields that weakly perturb the fluid density and speed of sound is presented and applied to study manipulation of concentration fields in rectangular-channel acoustic eigenmodes and in Bessel-function acoustic vortices. In the first example, methods to obtain horizontal and vertical multilayer stratification of the concentration field at the end of a flow-through channel are presented. In the second example, we demonstrate acoustic tweezing and spatiotemporal manipulation of a local high-concentration region in a lower-concentration medium, thereby extending the realm of acoustic tweezing to include concentration fields.

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Section: Model Systemsmentioning

confidence: 99%

Acoustic Tweezing and Patterning of Concentration Fields in Microfluidics

Karlsen

Bruus

2017

Phys. Rev. Applied

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“…The matching layers reduce resonances that would result in unwanted standing waves with nodal positions that were fixed by the geometry thus inhibiting translation of the field by phase variation. Matched plates without a backing layer were sufficient for trapping and manipulating the micro particles 10 . The matched plates were bonded to a flexible kapton ribbon that was then folded into an octagon.…”

Section: Fluorescence Imagingmentioning

confidence: 99%

Integrated ultrasonic particle positioning and low excitation light fluorescence imaging

Bernassau

Al-Rawhani

Beeley

et al. 2013

Applied Physics Letters

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A compact hybrid system has been developed to position and detect fluorescent micro-particles by combining a Single Photon Avalanche Diode (SPAD) imager with an acoustic manipulator. The detector comprises a SPAD array, light-emitting diode (LED), lenses, and optical filters. The acoustic device is formed of multiple transducers surrounding an octagonal cavity. By stimulating pairs of transducers simultaneously, an acoustic landscape is created causing fluorescent micro-particles to agglomerate into lines. The fluorescent pattern is excited by a low power LED and detected by the SPAD imager. Our technique combines particle manipulation and visualization in a compact, low power, portable setup.

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“…Acoustic manipulation, using ARF, has been widely applied in microfluidic devices, due to good biocompatibility [19], relatively simple instrumentation, robust architectures and good on-chip integration possibilities. Capabilities such as positioning of particles in a single plane for filtration (acoustic filters) [20,21], within a microfluidic channel [22] and within three dimensions [23] have been demonstrated. It can also be used for particle sorting and separation [24,25], and for the production and manipulation of aqueous droplets in oil [26,27].…”

Section: Introductionmentioning

confidence: 99%

Optimisation of an acoustic resonator for particle manipulation in air

Devendran

Billson

Hutchins

et al. 2016

Sensors and Actuators B: Chemical

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(2015) Optimisation of an acoustic resonator for particle manipulation in air. Sensors and Actuators B: Chemical, 224 . pp. 529-538. Permanent WRAP URL:http://wrap.warwick.ac.uk/83726 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. AbstractAn acoustic resonator system has been investigated for the manipulation and entrapment of micronsized particles in air. Careful consideration of the effect of the thickness and properties of the materials used in the design of the resonator was needed to ensure an optimised resonator. This was achieved using both analytical and finite-element modelling, as well as predictions of acoustic attenuation in air as a function of frequency over the 0.8 to 2.0 MHz frequency range. This resulted in a prediction of the likely operational frequency range to obtain particle manipulation. Experimental results are presented to demonstrate good capture of particles as small as 15 µm in diameter.

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Interactive manipulation of microparticles in an octagonal sonotweezer

Cited by 51 publications

References 14 publications

Acoustic Tweezing and Patterning of Concentration Fields in Microfluidics

Acoustic Tweezing and Patterning of Concentration Fields in Microfluidics

Integrated ultrasonic particle positioning and low excitation light fluorescence imaging

Optimisation of an acoustic resonator for particle manipulation in air

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