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

Volume

10

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1142

Lastpage

1146

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 Â¿ 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;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2009.2038577

Filename

5443788