Figure 6.

(a) Conductive polymer doping for degradation: (i) cardiac progenitor cell synergy with the conductive polymer (PPy) surface is critical for optimizing cardiac tissue regeneration.²²⁵ (ii) Conductive polymer (PANI) doping with FeCl₃.²²⁶ (b) Disintegration, degradability, and biocompatibility of PDPP-PD: (i) Illustration depicting the materials and device structure used in total disintegration electronics with iron electrodes. (ii) Images of a device disintegrating at different phases. (iii) Absorption spectrum shifts during the decomposition of PDPP-PD. (Inset) Images of polymer solution change in color after 10 and 40 days of decomposition. (iv) Absorption spectrum of a polymer film before and after decomposition in a pH 4.6 buffer solution changes. Images of the film before and after decomposition (inset). (v) Strand of human hair picked up disintegrable pseudo-CMOS circuits based on PDPP-PD. (vi) Device was positioned on the rough surface of an avocado.²²⁹ (c) Dielectric constant of degradable composites can be enhanced by combination of high-κ additives such as (i) Al₂O₃ and (ii) CNTs. Reprinted with permission from ref (185). Copyright 2018 American Chemical Society.