Abstract
In this work, we developed a convenient, one-step soft-lithographic-based molding technique for molding truly 3D microfluidic channels in polydimethylsiloxane (PDMS) by overcoming two grand challenges. We optimized the post-treatment conditions for 3D-printed resin structures to facilitate the use of them as masters for PDMS replica molding. What is more important, we demonstrated a novel method for single-step molding from 3D-printed microstructures to generate truly 3D microfluidic networks easily. With this technique, we fabricated some key, functional 3D microfluidic structures and components including a basket-weaving network, a 3D chaotic advective mixer and microfluidic peristaltic valves. Furthermore, an interesting “injection-on-demand” microfluidic device was also demonstrated. Our technique offers a simple, fast route to the fabrication of 3D microfluidic chips in a short time without clean-room facilities.
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The authors are grateful for the funding provided by Hong Kong Research Grants Council (#605210, #604712 and CUHK4/CRF/12G).
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Chan, H.N., Chen, Y., Shu, Y. et al. Direct, one-step molding of 3D-printed structures for convenient fabrication of truly 3D PDMS microfluidic chips. Microfluid Nanofluid 19, 9–18 (2015). https://doi.org/10.1007/s10404-014-1542-4
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DOI: https://doi.org/10.1007/s10404-014-1542-4