Surface acoustic wave diffraction driven mechanisms in microfluidic systems

Armaghan Fakhfouri, Citsabehsan Devendran, Thomas Albrecht, David J. Collins, Andreas Winkler, Hagen Schmidt, Adrian Neild

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

Acoustic forces arising from high-frequency surface acoustic waves (SAW) underpin an exciting range of promising techniques for non-contact manipulation of fluid and objects at micron scale. Despite increasing significance of SAW-driven technologies in microfluidics, the understanding of a broad range of phenomena occurring within an individual SAW system is limited. Acoustic effects including streaming and radiation force fields are often assumed to result from wave propagation in a simple planar fashion. The propagation patterns of a single SAW emanating from a finite-width source, however, cause a far richer range of physical effects. In this work, we seek a better understanding of the various effects arising from the incidence of a finite-width SAW beam propagating into a quiescent fluid. Through numerical and experimental verification, we present five distinct mechanisms within an individual system. These cause fluid swirling in two orthogonal planes, and particle trapping in two directions, as well as migration of particles in the direction of wave propagation. For a range of IDT aperture and channel dimensions, the relative importance of these mechanisms is evaluated.

Original languageEnglish
Pages (from-to)2214-2224
Number of pages11
JournalLab on a Chip
Volume18
Issue number15
DOIs
Publication statusPublished - 7 Aug 2018

Cite this

Fakhfouri, A., Devendran, C., Albrecht, T., Collins, D. J., Winkler, A., Schmidt, H., & Neild, A. (2018). Surface acoustic wave diffraction driven mechanisms in microfluidic systems. Lab on a Chip, 18(15), 2214-2224. https://doi.org/10.1039/c8lc00243f
Fakhfouri, Armaghan ; Devendran, Citsabehsan ; Albrecht, Thomas ; Collins, David J. ; Winkler, Andreas ; Schmidt, Hagen ; Neild, Adrian. / Surface acoustic wave diffraction driven mechanisms in microfluidic systems. In: Lab on a Chip. 2018 ; Vol. 18, No. 15. pp. 2214-2224.
@article{bf0b151f304f436c86b6dc0303a6bfe4,
title = "Surface acoustic wave diffraction driven mechanisms in microfluidic systems",
abstract = "Acoustic forces arising from high-frequency surface acoustic waves (SAW) underpin an exciting range of promising techniques for non-contact manipulation of fluid and objects at micron scale. Despite increasing significance of SAW-driven technologies in microfluidics, the understanding of a broad range of phenomena occurring within an individual SAW system is limited. Acoustic effects including streaming and radiation force fields are often assumed to result from wave propagation in a simple planar fashion. The propagation patterns of a single SAW emanating from a finite-width source, however, cause a far richer range of physical effects. In this work, we seek a better understanding of the various effects arising from the incidence of a finite-width SAW beam propagating into a quiescent fluid. Through numerical and experimental verification, we present five distinct mechanisms within an individual system. These cause fluid swirling in two orthogonal planes, and particle trapping in two directions, as well as migration of particles in the direction of wave propagation. For a range of IDT aperture and channel dimensions, the relative importance of these mechanisms is evaluated.",
author = "Armaghan Fakhfouri and Citsabehsan Devendran and Thomas Albrecht and Collins, {David J.} and Andreas Winkler and Hagen Schmidt and Adrian Neild",
year = "2018",
month = "8",
day = "7",
doi = "10.1039/c8lc00243f",
language = "English",
volume = "18",
pages = "2214--2224",
journal = "Lab on a Chip",
issn = "1473-0197",
publisher = "The Royal Society of Chemistry",
number = "15",

}

Fakhfouri, A, Devendran, C, Albrecht, T, Collins, DJ, Winkler, A, Schmidt, H & Neild, A 2018, 'Surface acoustic wave diffraction driven mechanisms in microfluidic systems', Lab on a Chip, vol. 18, no. 15, pp. 2214-2224. https://doi.org/10.1039/c8lc00243f

Surface acoustic wave diffraction driven mechanisms in microfluidic systems. / Fakhfouri, Armaghan; Devendran, Citsabehsan; Albrecht, Thomas; Collins, David J.; Winkler, Andreas; Schmidt, Hagen; Neild, Adrian.

In: Lab on a Chip, Vol. 18, No. 15, 07.08.2018, p. 2214-2224.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Surface acoustic wave diffraction driven mechanisms in microfluidic systems

AU - Fakhfouri, Armaghan

AU - Devendran, Citsabehsan

AU - Albrecht, Thomas

AU - Collins, David J.

AU - Winkler, Andreas

AU - Schmidt, Hagen

AU - Neild, Adrian

PY - 2018/8/7

Y1 - 2018/8/7

N2 - Acoustic forces arising from high-frequency surface acoustic waves (SAW) underpin an exciting range of promising techniques for non-contact manipulation of fluid and objects at micron scale. Despite increasing significance of SAW-driven technologies in microfluidics, the understanding of a broad range of phenomena occurring within an individual SAW system is limited. Acoustic effects including streaming and radiation force fields are often assumed to result from wave propagation in a simple planar fashion. The propagation patterns of a single SAW emanating from a finite-width source, however, cause a far richer range of physical effects. In this work, we seek a better understanding of the various effects arising from the incidence of a finite-width SAW beam propagating into a quiescent fluid. Through numerical and experimental verification, we present five distinct mechanisms within an individual system. These cause fluid swirling in two orthogonal planes, and particle trapping in two directions, as well as migration of particles in the direction of wave propagation. For a range of IDT aperture and channel dimensions, the relative importance of these mechanisms is evaluated.

AB - Acoustic forces arising from high-frequency surface acoustic waves (SAW) underpin an exciting range of promising techniques for non-contact manipulation of fluid and objects at micron scale. Despite increasing significance of SAW-driven technologies in microfluidics, the understanding of a broad range of phenomena occurring within an individual SAW system is limited. Acoustic effects including streaming and radiation force fields are often assumed to result from wave propagation in a simple planar fashion. The propagation patterns of a single SAW emanating from a finite-width source, however, cause a far richer range of physical effects. In this work, we seek a better understanding of the various effects arising from the incidence of a finite-width SAW beam propagating into a quiescent fluid. Through numerical and experimental verification, we present five distinct mechanisms within an individual system. These cause fluid swirling in two orthogonal planes, and particle trapping in two directions, as well as migration of particles in the direction of wave propagation. For a range of IDT aperture and channel dimensions, the relative importance of these mechanisms is evaluated.

UR - http://www.scopus.com/inward/record.url?scp=85050874552&partnerID=8YFLogxK

U2 - 10.1039/c8lc00243f

DO - 10.1039/c8lc00243f

M3 - Article

VL - 18

SP - 2214

EP - 2224

JO - Lab on a Chip

JF - Lab on a Chip

SN - 1473-0197

IS - 15

ER -

Fakhfouri A, Devendran C, Albrecht T, Collins DJ, Winkler A, Schmidt H et al. Surface acoustic wave diffraction driven mechanisms in microfluidic systems. Lab on a Chip. 2018 Aug 7;18(15):2214-2224. https://doi.org/10.1039/c8lc00243f