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A Microfluidic Chip for ICPMS Sample Introduction
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A micropillar array for sample concentration via in-plane evaporation.

Jae-Woo Choi1, Seyyed Mohammad Hosseini Hashemi1, David Erickson2

  • 1School of Engineering, École Polytechnique Fédérale de Lausanne , Lausanne 1015, Switzerland.

Biomicrofluidics
|November 8, 2014
PubMed
Summary
This summary is machine-generated.

This study introduces a lab-on-a-chip method using microfluidics and thermal gradients to concentrate samples. The technique effectively concentrates fluorescent beads and bacteria by a factor of 10 in just 100 seconds.

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Area of Science:

  • Microfluidics
  • Biotechnology
  • Analytical Chemistry

Background:

  • Lab-on-a-chip devices require efficient sample concentration for analysis.
  • Controlling liquid-gas interfaces is crucial for microfluidic sample manipulation.

Purpose of the Study:

  • To develop a microfluidic method for in-plane sample concentration on a lab-on-a-chip device.
  • To demonstrate the concentration of micro- and nanoparticles and bacteria.

Main Methods:

  • Utilized a polydimethylsiloxane microfluidic chip with a micropillar array to control the liquid-gas interface.
  • Applied a thermal gradient to drive in-plane evaporation for sample concentration.
  • Tested the method with 1 µm and 100 nm fluorescent beads and *Escherichia coli* bacteria.

Main Results:

  • Achieved sample concentration by controlling the liquid-gas interface within the microfluidic structure.
  • Demonstrated successful concentration of fluorescent beads and *E. coli* bacteria.
  • Concentrated samples by a factor of 10 within 100 seconds.

Conclusions:

  • The developed microfluidic method offers a precise and efficient way to concentrate samples on-chip.
  • This technique has potential applications in various fields requiring sample pre-concentration, such as diagnostics and environmental monitoring.