2019/10/17 by Zijie Lin, Jian Xu, Lin, Zijie +13
Engineering · Physics and Astronomy · #Additive Manufacturing and 3D Printing Technologies #Applied Physics (physics.app-ph) #FOS: Physical sciences #Laser Material Processing Techniques #Nanomaterials and Printing Technologies #physics.app-ph
paper · pdf · doi:10.48550/arxiv.2001.03589
27 pages, 5 figures
arxiv created 2019/10/17 · openalex publication_date 2019/10/17 · arxiv updated 2020/01/13 · openalex created_date 2020/01/23 · openalex updated_date 2026/07/28
Large-scale microfluidic microsystems with complex three-dimensional (3D) configurations are highly in demand by both fundamental research and industrial application, holding the potentials for fostering a wide range of innovative applications such as lab-on-a-chip and organ-on-a-chip as well as continuous-flow manufacturing of fine chemicals. However, freeform fabrication of such systems remains challenging for most of the current fabrication techniques in terms of fabrication resolution, flexibility, and achievable footprint size. Here, we report ultrashort pulse laser microfabrication of freeform microfluidic circuits with high aspect ratios and tunable diameters embedded in 3D printed glass objects. We achieve uniform microfluidic channel diameter by carefully distributing a string of extra access ports along the microfluidic channels for avoiding the over-etching in the thin microfluidic channels. After the chemical etching is completed, the extra access ports are sealed using carbon dioxide laser induced localized glass melting. We demonstrate a model hand of fused silica with a size of ~3 cm * 2.7 cm * 1.1 cm in which the whole blood vessel system is encapsulated.