fig3

Figure 3. Wire-based implantable E-AB sensor platforms and sensing mechanisms. (A) Intra-vascular monitoring. Reprinted with permission^[28]. Copyright 2019, American Chemical Society; (B) Intra-tumor sensing. Reprinted with permission^[105]. Copyright 2022, American Association for the Advancement of Science; (C) Nanoporous Gold (NPG) configuration and SEM images. Reprinted with permission^[107]. Copyright 2021, American Chemical Society; (D) Conceptual illustration of reaction kinetics. Reprinted with permission^[106]. Copyright 2021, John Wiley and Sons. PK: Pharmacokinetic; PTFE: polytetrafluoroethylene; E-AB: electrochemical aptamer-based; SEM: scanning electron microscope.