Fig. 8

Illustration of MTM platform. a The perfusion holes in the MEA surface. In the center (gray), middle (blue) and outer (yellow) regions of the MEA, the diameters of diffusion holes were 10, 50 and 100 μm with 10, 20 and 20 % OAR, respectively. b The acrylic perfusion chamber under the microscope. c The experimental setup of MTM platform. The perfusion system and the directions of the fluid flow are labeled