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The use of polyaniline nanofiber as modified cladding for fiber optic methanol vapor sensor

AKHIRUDDIN MADDU1,* , HAMDANI ZAIN2, SAR SARDY2

Affiliation

  1. Department of Physics, Bogor Institute of Agriculture, Bogor 16680, Indonesia
  2. Postgraduate Program of Optoelectrotechnique and Laser Application, Faculty of Technique University of Indonesia, Depok, Indonesia

Abstract

It has been developed a fiber optic sensor system for detection of methanol vapor. The system was based on the change in the absorption of evanescent wave on core-modified cladding interface when interacts with methanol vapor. In this research, used polyaniline nanofiber synthesized by interfacial polymerization as modified cladding. The spectroscopy result show a specific absorbance spectrum of polyaniline nanofiber was change in the visible range, especially in blue and red bands, when exposed with methanol vapor due to a conformational alignment of polyaniline blackbond structure. Response of the designed fiber optic sensor was investigated by measuring the transmission light intensity via fiber optic sensor system. It is obtained a very fast response time of 40 s and recovery time of 15 s. The fiber optic sensor also exhibits a good reversibility and repeatability..

Keywords

Polyaniline nanofiber, Fiber optic sensor, Methanol vapor.

Submitted at: Nov. 15, 2006
Accepted at: Aug. 18, 2007

Citation

AKHIRUDDIN MADDU, HAMDANI ZAIN, SAR SARDY, The use of polyaniline nanofiber as modified cladding for fiber optic methanol vapor sensor, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2362-2366 (2007)