This talk presents our recent advances in flexible and printed integrated circuits and biosensor arrays. First, the vertical stacking of three complementary transistors is introduced to design and fabricate 3D active-matrix multi-sensor arrays, which can independently measure temperature and pressure in real time. Second, inkjet-printed organic voltage amplifiers are presented by monolithically integrating organic electrochemical transistors (OECT) and thin-film polymer resistors on a single, highly flexible substrate for in vivo brain activity recording. Finally, a 3D tissue-integrated ion sensing platform based on OECTs is presented. We inkjet-printed large-area OECTs and integrated them with 3D-bioprinted lung models for the first time.
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