Effect of displacement on resistance and capacitance of polyaniline film

doi:10.1088/1674-1056/20/4/040601

Abstract This paper investigates the properties of displacement sensors based on polyaniline (PANI) films. About 1 wt% of PANI micropowder is mixed and stirred in a solution of 90 wt% water and 10 wt% alcohol at room temperature. The films of PANI are deposited from solution by drop-casting on Ag electrodes, which are preliminary deposited on glass substrates. The thicknesses of the PANI films are in the range of 20 μm-80 μm. A displacement sensor with polyaniline film as an active material is designed and fabricated. The investigations showed that, on average, the AC resistance of the sensor decreases by 2 times and the capacitance accordingly increases by 1.6 times as the displacement changes in the range of 0 mm-0.5 mm. The polyaniline is the only active material of the displacement sensor. The resistance and capacitance of the PANI changes under the pressure of spring and elastic rubber, and this pressure is created by the downward movement of the micrometer.

Keywords: polyaniline displacement sensor resistance and capacitance

Received: 04 July 2010
Revised: 29 August 2010
Accepted manuscript online:

PACS:	06.30.-k	(Measurements common to several branches of physics and astronomy)
	68.55.-a	(Thin film structure and morphology)
	81.15.-z	(Methods of deposition of films and coatings; film growth and epitaxy)

Cite this article:

Khasan Sanginovich Karimov, Muhammad Tariq Saeed, Fazal Ahmad Khalid, and Syed Abdul Moiz Effect of displacement on resistance and capacitance of polyaniline film 2011 Chin. Phys. B 20 040601

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Effect of displacement on resistance and capacitance of polyaniline film

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