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Chaotic mixing in three-dimensional microvascular networks fabricated by direct-write assembly
Daniel Therriault1, Scott R White, Jennifer A Lewis
1Department of Aerospace Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Nature Materials
|April 12, 2003
Summary
We fabricated 3D microvascular networks using direct-write assembly, creating complex fluidic devices. These networks enhance fluid mixing via chaotic advection, offering a versatile platform for microfluidic applications.
Area of Science:
- Microfluidics
- Materials Science
- Chemical Engineering
Background:
- Geometrically complex fluidic devices are crucial for advanced applications.
- Fabricating intricate 3D microscale structures presents significant challenges.
Purpose of the Study:
- To demonstrate a novel method for creating 3D microvascular networks.
- To investigate the fluid mixing capabilities of these 3D networks.
Main Methods:
- Utilizing direct-write assembly with a fugitive organic ink.
- Fabricating pervasive networks of smooth cylindrical microchannels (10-300 microm).
- Integrating square-spiral towers within the vascular network to induce chaotic advection.
Main Results:
- Successfully fabricated 3D microvascular networks with defined connectivity.
- Demonstrated significantly improved fluid mixing using square-spiral towers compared to 1D and 2D channels.
- Achieved reduced device footprint while enhancing mixing efficiency.
Conclusions:
- Direct-write assembly offers a viable method for creating complex 3D microfluidic devices.
- The integrated square-spiral towers effectively enhance fluid mixing through chaotic advection.
- These 3D microvascular networks represent a promising platform for diverse microfluidic applications.