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Chemiresistive sensors comprising PEDOT: PSS/NGPs Nanocomposites for detection of nitro aromatics

by IPR Cell


The present invention relates to a chemiresistor comprising poly (3, 4-ethylenedioxythiophene)/ poly(4-styrene sulphonate) (PEDOT:PSS) matrix reinforced with graphite nanosheets (NGP) for detection of nitrobenzene vapors. The detection mechanism is based on measuring resistivity changes that occur in a nanocomposite due to the absorption of nitrobenzene vapours by PEDOT/PSS/NGP film. These sensors exhibit excellent response at room temperature when exposed to vapours of nitrobenzene. Sensitivity as high as 18.5% is observed for PEDOT: PSS/NGPs composite. The chemresistor exhibits a fast response (~1.14 min) and good recovery time (~1-2 min).The response of nanocomposite to the nitrobenzene vapours is reproducible.



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