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. 2022 May 27;12(6):370. doi: 10.3390/bios12060370

Figure 3.

Figure 3

(A) Two PC substrates with integrated translucent gold electrodes were added to the upper and lower sides of the gut chip. Reprinted with permission from Ref. [72]. Copyright 2019 Royal Society of Chemistry. (B) Schematic illustration for fabrication of 3D printed frame. (i) Non-dissolvable and dissolvable resins were co-printed, and (ii) the dissolvable resin was selectively removed by submerging in DI water. (iii) Hollow channels were used for positioning microneedles. Reprinted with permission from Ref. [75]. Copyright 2015 American Institute of Physics.