@article { ISI:000268215200017,
	title = {Polypyrrole functionalized with FePcTSA for NO(2) sensor application},
	journal = {Sensors and Actuators B-Chemical},
	volume = {140},
	number = {2},
	year = {2009},
	month = {JUL},
	pages = {439-444},
	publisher = {ELSEVIER SCIENCE SA},
	address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND},
	abstract = {<p>The nitrogen dioxide (NO(2)) sensing capability of polypyrrole (PPy) was enhanced dramatically after functionalized with iron(III)phthalocyanine-4,4{\textquoteright},4 {\textquoteleft}{\textquoteright},4{\textquoteright}{\textquoteright}{\textquoteright}-tetrasulfonic acid monosodium salt (FePcTSA). The incorporated phthalocyanine was confirmed by different characterization techniques such as UV-vis spectroscopy, FTIR, GFAAS, EDAX, etc. The resistance of the functionalized PPy decreased spontaneously during exposure to NO(2) gas at room temperature. This material exhibited excellent stability, reversibility, and reproducibility. The lowest response time (t(50)) thus obtained is 47 s with a highest response factor (Delta R/R(0) x 100) of 50.25. (C) 2009 Elsevier B.V. All rights reserved.</p>},
	keywords = {Chemical sensor, Fe(III)phthalocyanine tetrasulfonate, Nitrogen dioxide, polypyrrole},
	issn = {0925-4005},
	doi = {10.1016/j.snb.2009.04.043},
	author = {Paul, Santhosh and Joseph, Michael}
}
@article { ISI:000265814500012,
	title = {Polypyrrole functionalized with ferrocenyl derivative as a rapid carbon monoxide sensor},
	journal = {Synthetic Metals},
	volume = {159},
	number = {5-6},
	year = {2009},
	month = {MAR},
	pages = {415-418},
	publisher = {ELSEVIER SCIENCE SA},
	address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND},
	abstract = {<p>A rapid carbon monoxide detection system was developed with the electrochemical functioncalization of polypyrrole (PPy) with ferrocenylmethyltrimethylammonium iodide (FTMA-I) as a co-dopant exhibits very high sensitivity to ppm levels of carbon monoxide gas and fast recovery under normal dry room temperature conditions. The co-dopant was synthesized mainly to incorporate into PPy electrochemically to modify the properties in order to sense carbon monoxide (CO) gas. The FTMA-I doped PPy exhibited the characteristics oxidation/reduction peaks for ferrocene in its cyclic voltammograms. The modified PPy films deposited on interdigited electrodes gave rapid sensitivity within a second to 300 ppm carbon monoxide gas and good sensitivity factor was observed even at 4 mmol of the functional groups in the polymer for 300 ppm carbon monoxide gas. This material detected the CO gas concentration as low as 100 ppm. (C) 2008 Elsevier B.V. All rights reserved.</p>},
	keywords = {carbon monoxide, Chemical sensor, conducting polymer, polypyrrole},
	issn = {0379-6779},
	doi = {10.1016/j.synthmet.2008.10.013},
	author = {Paul, Santhosh and Chavan, Nayaku and Radhakrishnan, S.}
}
