Journal
MOLECULES
Volume 26, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/molecules26092817
Keywords
projection micro-stereolithography; microfluidics; droplets; emulsions; three-dimensional; 3D printing; additive manufacturing
Funding
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [852065]
- Federal Ministry of Education and Research (BMBF, Biotechnology2020+: Leibniz Research Cluster) [031A360C]
- German Research Foundation (Research Training Group 1865 Hydrogel-based microsystems)
- European Research Council (ERC) [852065] Funding Source: European Research Council (ERC)
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Droplet microfluidics has revolutionized high-throughput screening, directed evolution, single-cell sequencing, and material design. Traditional fabrication techniques have drawbacks, but high-resolution additive manufacturing like PμSL offers a promising solution. PμSL simplifies device fabrication, provides access to 3D geometries, is cost-effective, and enables multimaterial processing.
Droplet microfluidics-the art and science of forming droplets-has been revolutionary for high-throughput screening, directed evolution, single-cell sequencing, and material design. However, traditional fabrication techniques for microfluidic devices suffer from several disadvantages, including multistep processing, expensive facilities, and limited three-dimensional (3D) design flexibility. High-resolution additive manufacturing-and in particular, projection micro-stereolithography (P mu SL)-provides a promising path for overcoming these drawbacks. Similar to polydimethylsiloxane-based microfluidics 20 years ago, 3D printing methods, such as P mu SL, have provided a path toward a new era of microfluidic device design. P mu SL greatly simplifies the device fabrication process, especially the access to truly 3D geometries, is cost-effective, and it enables multimaterial processing. In this review, we discuss both the basics and recent innovations in P mu SL; the material basis with emphasis on custom-made photopolymer formulations; multimaterial 3D printing; and, 3D-printed microfluidic devices for emulsion formation as our focus application. Our goal is to support researchers in setting up their own P mu SL system to fabricate tailor-made microfluidics.
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