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  Chemical Sensors 2013, 3: 20
  Research Article
Quantum resistive vapour sensors made of polymer coated carbon nanotubes random networks for biomarkers detection
  B. Kumar, M. Castro, J. F. Feller  
Smart Plastics Group, European University of Brittany (UEB), LIMATB-UBS, Lorient, France
  We report a straightforward approach to develop vapour quantum resistive sensors (vQRS) from polymer coated multi-walled carbon nanotube (CNT) random networks. A well controlled conducting architecture has been structured in two steps, firstly a random network of CNT was sprayed layer by layer (sLbL) and secondly CNT were coated by a nanometric layer of drop-casted polymer. The chemo-resistive behaviour of sensors exposed to several volatile organic compounds such as acetone, isopropanol, tetrahydrofuran, dichloromethane, chloroform, butanol, toluene or ethanol (which are also biomarkers for lung cancer detection from breath analysis) has been investigated. This new technique was found to be very effective to develop arrays of vapour transducers (possibly tuned by the amount of polymer deposited on CNT network) with fast, stable and reversible responses, highly selective and capable to discriminate biomarkers through a PCA treatment.
  Carbon nanotube; Random network; Polymer sheath; Volatile vapour compounds (VOC); Sensor array; Cancer biomarkers  

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