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Programmable v-type valve for cell and particle manipulation in microfluidic devices.

Hoon Suk Rho1, Yoonsun Yang2, Alexander T Hanke3

  • 1Mesoscale Chemical Systems Group, MESA+ Institute for Nanotechnology, University of Twente, The Netherlands. j.g.e.gardeniers@utwente.nl.

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A novel v-type microfluidic valve precisely controls fluid flow and captures/releases particles and cells. This flexible valve system offers versatile applications in microfluidic device manipulation.

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Area of Science:

  • Microfluidics
  • Biotechnology
  • Mechanical Engineering

Background:

  • Microfluidic devices require precise control over fluid flow and particle manipulation.
  • Existing microfluidic valves may have limitations in flexibility and specific area blocking.
  • The development of novel valve designs is crucial for advancing microfluidic applications.

Purpose of the Study:

  • To demonstrate a new, flexibly actuated microfluidic valve, termed the "v-type valve."
  • To characterize the valve's performance under various operating conditions.
  • To showcase the valve's potential in particle and cell manipulation within microfluidic systems.

Main Methods:

  • Fabrication of v-type valves using multilayer soft lithography.
  • Characterization of valve performance at different operating pressures.
  • Evaluation of valve functionality by trapping and releasing microparticles and single cells from flowing suspensions.

Main Results:

  • Successful demonstration of a v-type microfluidic valve capable of focusing fluid flow and blocking microchannel areas.
  • Effective trapping and controlled release of microparticles (7 μm and 15 μm) and single cells.
  • Demonstrated integration with other microfluidic components, such as poly(dimethyl siloxane) (PDMS) monolithic valves.

Conclusions:

  • The v-type valve offers a flexible and effective solution for fluid flow control in microfluidics.
  • The valve system facilitates precise manipulation of particles and cells, enabling applications like solid-phase column creation and cell isolation.
  • This new valve technology holds significant promise for a wide range of microfluidic applications involving particle and cell handling.