“…Since its invention in the late 1980s, 3D printing offers the opportunity for manufacturers to circumvent the time-consuming steps of traditional manufacturing technology via a full-scale or scaled-down mechanical replica of the products designed by computers [46][47][48][49]. A broad range of research components, including chemical reaction-ware [40,44,48,50], gradient generators [51,52], instrumental setups and interfaces [53][54][55][56][57], droplet extractors [52], and user-oriented functional devices [58][59][60][61] have been successfully built with the aid of 3D printing technologies confirming the feasibility of this approach. Further modification of 3D printed devices via adding chemicals or precursors of interest or post-printing surface functionalization extend the applicability of constructed products [45,62,63].…”