fig9

Figure 9. Design of LIG-based gas sensor. (A) Mechanism of resistive sensors for gas detection. Reproduced with permission^[136]. Copyright 2019, American Chemical Society. (B) Photograph of the resistive gas sensor^[102]. Copyright 2020, American Chemical Society. (C) Schematic diagram of the resistive gas sensor with optimized structure. (D) Cyclic test of the resistive gas sensor in the environments of vacuum, air, and helium^[139]. Copyright 2019, American Chemical Society. (E) Mechanism of electrochemical gas sensors for the detection of methane. (F) Correlation of the current with the gas concentration for methane, ethane, propane, and methane in the humid air. Reproduced with permission^[140]. Copyright 2019, American Chemical Society.