Abstract
An on-chip self-contained autonomous microfluidic cooling system, driven by a constant external rotating magnetic stirrer, has been developed using liquid-phase photopolymerization and nickel electroplating. A temperature-sensitive hydrogel, that acts in a way similar to an automotive clutch, provides the autonomous functionality. By controlling the rotation of the nickel impeller, the hydrogel effectively controls the pumping of cold water to cool the system when temperatures are high. Once cooled, the system autonomously stops pumping. The autonomous functionality and cooling effect of the system were observed at various heater temperature setpoints. Cooling temperatures ranging between 1.6°C and 4.0°C were exhibited by the system.
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