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Related Experiment Video

Updated: Jun 20, 2026

Increasing cDNA Yields from Single-cell Quantities of mRNA in Standard Laboratory Reverse Transcriptase Reactions using Acoustic Microstreaming
04:52

Increasing cDNA Yields from Single-cell Quantities of mRNA in Standard Laboratory Reverse Transcriptase Reactions using Acoustic Microstreaming

Published on: July 11, 2011

A millisecond micromixer via single-bubble-based acoustic streaming.

Daniel Ahmed1, Xiaole Mao, Jinjie Shi

  • 1Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA.

Lab on a Chip
|August 26, 2009
PubMed
Summary

We developed a simple microfluidic device using a single air bubble and acoustic waves to achieve ultra-fast, homogeneous mixing in milliseconds. This acoustic streaming technique offers efficient fluid mixing for various biochemical applications.

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Area of Science:

  • Fluid dynamics
  • Acoustics
  • Microfluidics

Background:

  • Microfluidic devices enable precise control over small fluid volumes.
  • Achieving rapid and homogeneous mixing in microchannels is crucial for many applications.
  • Traditional mixing methods can be slow or require complex designs.

Purpose of the Study:

  • To present a novel microfluidic device for ultra-fast homogeneous fluid mixing.
  • To demonstrate the efficacy of single-bubble-based acoustic streaming for mixing.
  • To highlight the potential of this technique for biochemical studies.

Main Methods:

  • A microfluidic channel with a "horse-shoe" structure was designed to trap an air bubble.
  • Acoustic waves were applied to the trapped air bubble at its resonance frequency.
  • The resulting acoustic streaming was used to disrupt laminar flows and induce mixing.

Main Results:

  • Ultra-fast homogeneous mixing was achieved within milliseconds.
  • The single-bubble acoustic streaming effectively disrupted laminar flow patterns.
  • The device demonstrated excellent mixing performance with a simple design.

Conclusions:

  • Single-bubble-based acoustic streaming provides an efficient method for rapid microfluidic mixing.
  • The developed micromixer is suitable for applications requiring fast and homogeneous fluid integration.
  • This technique offers a promising, simple, and effective solution for biochemical studies.