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High-resolution Patterning Using Two Modes of Electrohydrodynamic Jet: Drop on Demand and Near-field Electrospinning
Published on: July 10, 2018
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Multimaterial polyacrylamide: fabrication with electrohydrodynamic jet printing, applications, and modeling
Michael J Poellmann1, Amy J Wagoner Johnson
1Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, USA.
Biofabrication
|July 4, 2014
Summary
Researchers developed a new method using electrohydrodynamic jet (e-jet) printing to create intricate, multimaterial hydrogels. These custom hydrogels are useful for studying cell behavior and developing responsive materials.
Area of Science:
- Materials Science
- Biotechnology
- Chemical Engineering
Background:
- Micropatterned, multimaterial hydrogels offer significant potential in studying cellular microenvironments and developing advanced materials.
- Existing fabrication methods often lack the resolution or flexibility required for complex designs.
Purpose of the Study:
- To present a novel fabrication method for creating microscale, multimaterial hydrogels with high resolution and flexibility.
- To demonstrate the utility of these hydrogels in applications such as cell culture and stimuli-responsive materials.
Main Methods:
- Utilized an electrohydrodynamic jet (e-jet) printer to pattern polyacrylamide prepolymer droplets on a substrate.
- Employed a backfilling technique with a second polyacrylamide mixture, followed by photopolymerization and substrate removal.
- Characterized the resulting hydrogels using fluorescent microscopy, confocal microscopy, and scanning probe microscopy.
- Applied finite element modeling to analyze the mechanics of feature formation.
Main Results:
- Successfully fabricated microscale, multimaterial hydrogels with distinct topographical features (shallow wells).
- Confirmed the precise patterning and multimaterial composition using advanced microscopy techniques.
- Demonstrated the hydrogels' responsiveness to stimuli and their effectiveness as patterned substrates for cell culture.
Conclusions:
- The e-jet printing technique provides a flexible and high-resolution method for fabricating complex multimaterial hydrogels.
- These engineered hydrogels are promising for diverse applications in cell biology and materials science.
