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Updated: Nov 20, 2025

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

Flow control in a laminate capillary-driven microfluidic device.

Ilhoon Jang¹, Hyunwoong Kang, Simon Song

¹Institute of Nano Science and Technology, Hanyang University, Seoul, Korea04763.

|January 25, 2021

Summary

This summary is machine-generated.

This study introduces novel flow control methods for capillary-driven microfluidic devices, enhancing their functionality for on-site analysis. New valve systems and Y-channel designs enable precise control over fluid flow and concentration gradients.

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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

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Published on: October 1, 2007

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Published on: April 17, 2018

Area of Science:

Microfluidics
Analytical Chemistry
Biotechnology

Background:

Capillary-driven microfluidic devices offer low-cost, pump-free solutions for on-site analysis.
Existing devices often lack precise flow control, limiting their analytical capabilities.
Paper and polyester film are common materials for these devices.

Purpose of the Study:

To develop new fluidic control methods for laminate capillary-driven microfluidic devices.
To enhance the functionality and expand the applications of these devices.
To enable precise control over flow and concentration in microfluidic systems.

Main Methods:

Introduction of push and burst valve systems for stopping and starting flow.
Development of flow control strategies for Y-shaped channels.
Investigation of flow velocity dependence on channel geometry and fluid properties.

Main Results:

Push and burst valves successfully stopped flow for over 30 minutes, activated by physical pressure or fluid inflow.
Y-shaped channels demonstrated controlled concentration gradients (laminar, gradient, mixed flows).
Flow velocity in the main channel was precisely controlled by adjusting inlet channel length, showing constant velocity with increasing length.

Conclusions:

The developed fluidic control tools significantly increase the functionality of capillary-driven microfluidic devices.
These advancements enable new designs for low-cost, point-of-need assays across diverse scientific fields.
Precise flow and concentration control are achievable in simple, inexpensive microfluidic platforms.