Probing the p‐type Chemiresistive Response of NiFe2O4 Nanoparticles for Potential Utilization as Ethanol Sensor

Detection of gas molecules and volatile organic compounds (VOCs) using efficient, low cost sensors has fetched significant attention in environmental monitoring, safety measures and medical diagnosis. In the present work, nickel ferrite (NFO) nanoparticles are explored as p‐type semiconducting metal oxide (SMO) sensor for detection of five different organic vapors namely methanol, ethanol, n‐propanol, iso‐propanol and acetone which often cause severe damage to human body under prolonged exposure. The sensing studies in presence of the aforementioned five vapors are carried out by varying the sensor operating temperature (225–300 °C) and vapor concentrations (10–1000 ppm). Developed NFO sensor demonstrated best performance in terms of sensing (~10 ppm), response time (