Fig. 1. Schematic of the fabrication process to form a freeze cast sensor array. (a) Design and fabrication of a master mold by additive manufacture. (b) Transfer of 3D pattern to a PDMS mold. (c and d) Fill the PDMS mold with prepared PZT water-based suspension. (e–h) Application of the freeze-casting process. (i) Encapsulate the patterned porous PZT sample in a PDMS matrix.
