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Anal Chem. 2018 Sep 4;90(17):10450-10456. doi: 10.1021/acs.analchem.8b02356. Epub 2018 Aug 17.

FDM 3D Printing of High-Pressure, Heat-Resistant, Transparent Microfluidic Devices.

Author information

1
Department of Biochemistry and Biophysics , University of California, San Francisco , San Francisco , California 94158 , United States.
2
California Institute for Quantitative Biomedical Research , San Francisco , California 94158 , United States.
3
Chan Zuckerberg Biohub , San Francisco , California 94158 , United States.

Abstract

Transparent surfaces within microfluidic devices are essential for accurate quantification of chemical, biological, and mechanical interactions. Here, we report how to create low-cost, rapid 3D-printed microfluidic devices that are optically free from artifacts and have transparent surfaces suitable for visualizing a variety of fluid phenomenon. The methodology described here can be used for creating high-pressure microfluidic systems (significantly higher than PDMS-glass bonding). We develop methods for annealing Poly-Lactic Acid (PLA) microfluidic devices demonstrating heat resistance typically not achievable with other plastic materials. We show DNA melting and subsequent fluorescent imaging analysis, opening the door to other high-temperature applications. The FDM techniques demonstrated here allow for fabrication of microfluidic devices for precise visualization of interfacial dynamics, whether mixing between two laminar streams or droplet tracking. In addition to these characterizations, we include a printer troubleshooting guide and printing recipes for device fabrication to facilitate FDM printing for microfluidic device development.

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