Clinically Diagnose Asthma and Monitor Its Severity Using an Ultrasensitive Chemiresistive Nitric Oxide (NO) Gas Sensor via Exhaled Breath Analysis Assisted by Pattern Recognition

= 0.94, a strong linear relationship between two types of response values was observed, confirming the sensor's accuracy and reliability in detecting NO concentrations in exhaled breath. Theoretical adsorption models of NO on the surface of the sensor were constructed using DFT calculations to elucidate the mechanisms driving the sensor's ultrasensitivity. Overall, the sensor demonstrates a significant potential for use in clinical practice to diagnose asthma and monitor its severity.