Figure 1.

Fabrication of thin film device. (a) A cross‐sectional scanning electron microscope image of a typical mpPCL film, with (b) a magnified example of the interpore connectivity. (c) Devices are fabricated by combining porous (dark gray) and nonporous (light gray) films and sealing together with heat. The resulting film with a strip of mpPCL is formed around a cylindrical mold (purple) and heat sealed along the length of the mold. Prior to loading the protein pellet (white speckled), one end is heat sealed, and once loaded, the open end is sealed. Finally, the device is trimmed to remove excess polymer. (d) Photograph of a example lab‐scale device