Low-Power and High-Sensitivity Humidity Sensor Using Fe-Al-Polyaniline Blends

We fabricated a humidity-sensing material, using a solution-based process of Fe-Al-polyaniline (PANI) blends. The characteristics of the developed material were verified by IR, UV-visible (VIS) spectroscopy, and SEM. Based on these observations, the water vapor absorption introduced the resistance change of the PANI blends. In addition, the fabricated sensor was also evaluated as having low power consumption and high sensitivity because of its 10
⁸
¿ intrinsic resistance and exponential response to humidity changes. It also showed good predictability within the examined relative humidity range of 35% to 70%. We also examined the sensor selectivity, reproduction, setup time, and temperature stability.