“…One of the most common composites used in these efforts is a cobalt ferrite (CFO) and barium titanate (BTO) core-shell conjugate (CFO-BTO) due to its high magnetoelectric coupling coefficient and relatively low toxicity, but other emerging composites such as BTO/iron oxide 49,50 (α = 28.78 mV/cm•Oe), cobalt-doped BiFeO 3 51,52 (α = 6.5 V/cm•Oe), CFO/BTO/polydopamine-P(VDF-TrFE) 53 (α E33 = 150.58 mV/cm•Oe), and BTO/nickel 54 (α = 225 µV/cm•Oe) are paving the way to an expanded toolkit of magnetoelectric probes and sensors. With appropriate biocompatible surface functionalization, new magnetoelectric compounds are expanding usability and improving safety for both SPIONs and MENPs for MPI [55][56][57] .…”