Gas Sensor Selectivity Assessment Indicator of Fill Factor from Response Curve: A Case Study on WS 2 -Based Ammonia Gas Sensors

sensors at different concentrations of ammonia, acetone, methanol, ethanol, and water vapor were calculated and used for gas selectivity analysis. Results demonstrated distinct FF ranges for ammonia and other gases, validating FF as a potential selectivity indicator. This approach provides a multidimensional analysis framework for enhanced single-sensor discrimination by constructing a parameter space incorporating curve morphology features.