Selective particle and cell capture in a continuous flow using micro-vortex acoustic streaming

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

74 Scopus Citations
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Author(s)

  • David J. Collins
  • Zhichao Ma
  • Andreas Winkler
  • Robert Weser
  • Hagen Schmidt
  • Jongyoon Han
  • Ye Ai

Detail(s)

Original languageEnglish
Pages (from-to)1769-1777
Journal / PublicationLab on a Chip
Volume17
Issue number10
Online published5 Apr 2017
Publication statusPublished - 21 May 2017
Externally publishedYes

Abstract

Acoustic streaming has emerged as a promising technique for refined microscale manipulation, where strong rotational flow can give rise to particle and cell capture. In contrast to hydrodynamically generated vortices, acoustic streaming is rapidly tunable, highly scalable and requires no external pressure source. Though streaming is typically ignored or minimized in most acoustofluidic systems that utilize other acoustofluidic effects, we maximize the effect of acoustic streaming in a continuous flow using a high-frequency (381 MHz), narrow-beam focused surface acoustic wave. This results in rapid fluid streaming, with velocities orders of magnitude greater than that of the lateral flow, to generate fluid vortices that extend the entire width of a 400 μm wide microfluidic channel. We characterize the forces relevant for vortex formation in a combined streaming/lateral flow system, and use these acoustic streaming vortices to selectively capture 2 μm from a mixed suspension with 1 μm particles and human breast adenocarcinoma cells (MDA-231) from red blood cells.

Citation Format(s)

Selective particle and cell capture in a continuous flow using micro-vortex acoustic streaming. / Collins, David J.; Khoo, Bee Luan; Ma, Zhichao et al.

In: Lab on a Chip, Vol. 17, No. 10, 21.05.2017, p. 1769-1777.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review