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Related Experiment Video

Updated: May 12, 2026

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

Preprogrammed capillarity to passively control system-level sequential and parallel microfluidic flows.

Sung-Jin Kim1, Sophie Paczesny, Shuichi Takayama

  • 1Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.

Lab on a Chip
|April 20, 2013
PubMed
Summary

This study demonstrates precise sequential and parallel microfluidic flow control using only passive, capillarity-driven methods. Sophisticated multi-solution processing is achieved without active valves or pumps.

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Area of Science:

  • Microfluidics
  • Fluid Dynamics
  • Biotechnology

Background:

  • Capillarity-driven flow is a spontaneous phenomenon in microfluidics, often considered insufficient for complex fluid handling.
  • Previous microfluidic systems typically rely on active components like valves and pumps for controlled multi-solution processing.

Purpose of the Study:

  • To demonstrate system-level sequential and parallel microfluidic flow processing using solely passive, capillarity-driven control.
  • To challenge the common notion that passive capillarity alone cannot achieve sophisticated microfluidic flow management.

Main Methods:

  • Manual loading of solutions into a microfluidic chip.
  • Utilizing a network of microfluidic channels for passive regulation of flow timing and direction.
  • Employing auxiliary channels and preprogramming of inlet-well meniscus pressure and channel fluidic conductance.

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Related Experiment Videos

Last Updated: May 12, 2026

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

Generation of Dynamical Environmental Conditions using a High-Throughput Microfluidic Device
14:48

Generation of Dynamical Environmental Conditions using a High-Throughput Microfluidic Device

Published on: April 17, 2021

Bilayer Microfluidic Device for Combinatorial Plug Production
07:03

Bilayer Microfluidic Device for Combinatorial Plug Production

Published on: December 1, 2023

Main Results:

  • Successful demonstration of sequential and synchronous flow of multiple solution menisci.
  • Achieved preprogrammed flow control of up to 10 solutions within a single device chip.
  • Validated the capability of passive capillarity for complex microfluidic operations.

Conclusions:

  • Passive capillarity-driven control is sufficient for sophisticated, system-level microfluidic flow processing.
  • Eliminates the need for active valves and pumps in advanced microfluidic applications.
  • Presents a novel approach for simplified and cost-effective microfluidic device design.