Development of layer-by-layer CNT thin film assemblies for volatile organic compounds sensing

In this study carbon nanotubes (CNT)-based conductive polymer nanocomposites fabricated by electrostatic layerby-layer (LbL) technique were used as the sensitive gas sensors. The conductive layers were progressively built alternative exposing into sodium deoxycholate (DOC)stabilized CNT anionic and...

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Bibliographic Details
Published inIET Conference Proceedings
Main Authors Park, YT, Kim, CW, Kumar, B
Format Conference Proceeding
LanguageEnglish
Published Stevenage The Institution of Engineering & Technology 07.10.2015
Subjects
Acetone
Assemblies
Carbon nanotubes
Chloroform
Dichloromethane
Ethanol
Gas sensors
Methanol
Nanocomposites
Nanotubes
Organic compounds
Sodium
Tetrahydrofuran
Toluene
VOCs
Volatile organic compounds
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Summary:In this study carbon nanotubes (CNT)-based conductive polymer nanocomposites fabricated by electrostatic layerby-layer (LbL) technique were used as the sensitive gas sensors. The conductive layers were progressively built alternative exposing into sodium deoxycholate (DOC)stabilized CNT anionic and poly(diallyldimethyl-ammonium chloride) [PDDA] cationic solutions, respectively. By this technique the fine control of sensitivity to VOC was accomplished due to a fine tuning of multilayer films resistance (from 50 to 2 kΩ) by the precise control of layer thicknesses (from 5 to 40 nm). This study resulted that 16 bilayer PDDA/(CNT+DOC) LbL assemblies provided the optimum detecting and diagnosing performances of eight VOC vapors (i.e., chloroform, acetone, ethanol, water, toluene, dichloromethane, tetrahydrofuran and methanol).
ISBN:1785610368
9781785610363
DOI:10.1049/cp.2015.1584