Polymer-Based Memristive Devices for Ammonium Biosensing

Memristive devices offer a promising approach for biosensing due to their high sensitivity. In two-terminal planar devices, the movement of charged species in the semiconductor channel creates a voltage gap, which can be exploited for sensing. In this study, we developed flexible polymer-based memristive devices with gold electrodes connected by a PEDOT blend. Device characterization was conducted under electrolyte conditions, and the voltage gap size was analyzed. After functionalization with an ammonium ion-selective membrane, the devices successfully detected ammonium in the 0.01 to 100 mM range. These results lay the groundwork for selective in-memory biosensing.