Alternative Valve DesignsAlternative Valve DesignsAlternative Valve Designs •Design Elements–Isolated fluid chamber–Membrane division between chamber and fluid channel–Stopper to aid in the control of the fluid•Phase Change Bubble Valve–Principles of Actuation•Volatile liquid (cyclopentane)•Resistive heaters•Heater cause fluid to change from liquid to gas•Expansion from gas pressure deflects membraneSU-8PDMS Flex LayerPDMS Fluid LayerSU-8 Bottom LayerHeaterAlternative Valve DesignsElectrolytic Bubble Valve–Principles of actuation•Water•Two electrodes•Application of current causes electrochemical reaction•Creation of bubbles increase pressure in chamber•Piezoelectric Valve–Principles of actuationSU-8PDMS Flex LayerPDMS Fluid LayerSU-8 Bottom
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