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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
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Temperature-driven self-actuated microchamber sealing system for highly integrated microfluidic devices.

Toyohiro Naito1, Rerngchai Arayanarakool, Séverine Le Gac

  • 1Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, FIRST Chikusa-ku, Nagoya, Japan. naito.toyohiro@f.mbox.nagoya-u.ac.jp

Lab on a Chip
|December 14, 2012
PubMed
Summary

A novel self-actuated valve seals microchambers for polymerase chain reaction (PCR) using only temperature changes. This innovation simplifies parallel PCR array devices by eliminating complex control systems.

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Area of Science:

  • Materials Science
  • Biotechnology
  • Chemical Engineering

Background:

  • Microfluidic devices require precise control of reaction conditions.
  • Effective sealing of microchambers is crucial for sensitive assays like polymerase chain reaction (PCR).
  • Existing valve systems for microchambers often involve complex external control mechanisms.

Purpose of the Study:

  • To introduce a novel self-actuated microchamber sealing valve.
  • To demonstrate temperature-driven actuation for simplified valve operation.
  • To enable the development of advanced, highly parallel PCR array devices.

Main Methods:

  • Utilized a thermoplastic UV-curable polymer as the device material.
  • Designed a valve that self-actuates based on pressure changes during thermal cycling.
  • Integrated the valve into a microchamber system for polymerase chain reaction (PCR) applications.

Main Results:

  • The self-actuated valve effectively seals microchambers at temperatures up to 90 °C.
  • Valve actuation is achieved solely by temperature-induced pressure changes, requiring no external peripherals.
  • The polymer material facilitates the fabrication of multi-layered devices and temperature-driven valve function.

Conclusions:

  • The developed self-actuated valve offers a simplified and effective solution for microchamber sealing in thermal reactions.
  • This technology is essential for advancing highly parallel PCR array devices.
  • The use of a thermoplastic UV-curable polymer enables robust and integrated microfluidic systems.