Fig. 5. (a) Transmission characteristic change of an OECT when cell suspension is added within 1 h. (b) Transmission characteristic change of an OECT when cell suspension is added in 1 h to 2 h. (c) The gate voltage shifts and offsets the transfer curve corresponding to (a) and (b). (d) Schematic diagram of potential drops in the electric double layers (EDL), including the channel/electrolyte and electrolyte/gate interfaces, in the OECT before and after the capture of cells on the PEDOT:PSS surface.