Title :
Low-Power and High-Sensitivity Humidity Sensor Using Fe-Al-Polyaniline Blends
Author :
Lin, Chih-Ting ; Huang, Che-Wei
Author_Institution :
Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
6/1/2010 12:00:00 AM
Abstract :
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 108 ¿ 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.
Keywords :
aluminium; composite materials; conducting polymers; electrical resistivity; gas sensors; humidity; humidity sensors; infrared spectra; iron; polymer blends; thin film sensors; ultraviolet spectra; visible spectra; Fe-Al-polyaniline blends; IR spectroscopy; SEM; UV-visible spectroscopy; exponential response; high-sensitivity humidity sensor; humidity-sensing material; intrinsic resistance; low-power humidity sensor; relative humidity; solution-based process; water vapor absorption; Costs; Energy consumption; Fabrication; Humidity; Polymers; Sensor phenomena and characterization; Space technology; Stability; Temperature sensors; Wireless sensor networks; Composite thin film; polyaniline (PANI); relative humidity (RH); solution process;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2009.2038577
