Figure 3
From: Phase-selective graphene oxide membranes for advanced microfluidic flow control
Measurement of GO impermeability to air. (a) Exploded view of disc design with PMMA (green) and PSA (gray) layers and design structure showing the functional parts. The left and right arms are sealed by PSA and GO tabs, respectively. (b) Operation under various air pressures. (c) Image sequence showing that even at high-speed rotation at 100 Hz, hydrostatic equilibrium is maintained to demonstrate the impermeability of the GO membrane to air (and the integrity of the membrane and its seal with the disc substrate).
