Vapour sensing with conductive polymer nanocomposites (CPC): Polycarbonate-carbon nanotubes transducers with hierarchical structure processed by spray layer by layer

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• 作者：Jianbo Lu ; Bij ; ra Kumar ; Mickaë ; l Castro ; Jean-Franç ; ois Feller
• 关键词：Conductive polymer nanocomposite ; Carbon nanotube ; Vapour sensing ; Chemo-electrical behaviour ; Atomic force microscopy ; Volatile organic compounds
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2009
• 出版时间：16 July 2009
• 年：2009
• 卷：140
• 期：2
• 页码：451-460
• 全文大小：1662 K

文摘

The development of conductive polymer nanocomposite (CPC) sensors for volatile organic compounds (VOC) detection has been carried out using a spray layer by layer (LbL) process. This technique was successfully used to hierarchically structure polycarbonate-multiwall carbon nanotubes (PC-CNT) solutions into a double percolated architecture as attested by atomic force microscopy (AFM) and optical microscopy (OM). PC-CNT vapour sensing behaviour was investigated as a function of CNT content, films thickness, vapour flow and vapours solubility parameter. The response ranking A_r(toluene) > A_r(methanol) > A_r(water) of PC-CNT was found to be coherent with κ₁₂ Flory–Huggins interaction parameters provided that signals are normalised by analyte molecules number. Signals shape was interpreted to the light of Langmuir–Henry–Clustering (LHC) model and found to be proportional to vapour content.