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Camphorsulfonic Acid Doped Polyaniline for Detection of Terpenes Released by Plants After Pest Attack

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Camphor sulfonic acid doped polyaniline-poly(vinyl alcohol) composite film was synthesized by in situ oxidative polymerization of aniline using ammonium persulfate as oxidant. Sensing experiments were performed on the composite film with the injection of various concentrations of two terpenes viz. farnesene and linalool at room temperature. The sensor responded rapidly and reversibly in the presence of farnesene and linalool vapors which was detected by resistance change of the composite film upon exposure to the vapor. Selectivity tests revealed that the sensor selectively responded to linalool compared to farnesene. The sensing response has been explained on the basis of FT-IR spectroscopic analysis of the polymer film before and after exposure to the terpene vapor.
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Document Type: Research Article

Publication date: 2011-10-01

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