POLY (METHYLE METHACRYLATE) - CARBON NANOTUBES CONDUCTIVE POLYMER NANOCOMPOSITE (CPC): CONDUCTIVE NETORK ARCHITECTURE AND POTENTIAL AS SNSOR

摘要

Organic vapour sensors based on poly (methyl methacrylate)-multi-wall carbon nanotubes (PMMA-CNT) conductive polymer nanocomposite (CPC) were developed via layer by layer technique by spray deposition. CPC Sensors were exposed to a series of solvents and their chemo-electrical properties were studied. Detection time was found to be shorter than that necessary for full recovery of initial state. The applicability of PMMA-CNT sensor as a component of array for e-nose demonstration has been explored. Moreover effect of filler concentration as well as solvent fraction has been studied. CNT real three dimensional networks have been visualized by Atomic Force Microscopy (AFM) in a field assisted intermittent contact mode. More interestingly real conductive network system and electrical ability of CPC have been explored by current-sensing atomic force microscopy (CS-AFM). In addition realistic effect of voltage on electrical conductivity has been elucidated and was found ohmic in experimental range.