VEGA 1/0062/22: New generation of chemiresistive gas sensors with capacitor-like electrode arrangement and built-in memory

The proposed project is focused on improvement of gas sensing properties and characterization of innovative chemiresistive gas sensors based on semiconducting metal oxides with capacitor-like electrode arrangement and "gasistor" devices, which combine the gas sensing and resistive switching in a single capacitor-like structure. As such, they form a device with new functionalities - a switch triggered by a change of the target gas concentration and a gas sensor with built-in memory. Regarding the gas sensors, the emphasis is put on decreasing their detection limit, which we plan to do by implementing large-scale nanoporous top Pt electrodes. Subsequently,
they will also be implemented into the "gasistor" devices. The second part of the project is focused on creating a model of operation and characterization of the "gasistor" devices, which were not yet fully described. In this field, we also aim to analyze a continuous resitive switching observed in these structures and utilize it as an analog memory.