A microfluidic platform for the construction of microscale components and a
utonomous systems is presented. The platform combines liquid-phase photopol
ymerization, lithography, and laminar flow to allow the creation of complex
and autonomous microfluidic systems. The fabrication of channels, actuator
s, valves, sensors, and systems is demonstrated. Construction times can be
as short as 10 min, providing ultrarapid prototyping of microfluidic system
s.