Inkjet printing of polymer functionalized CNT gas sensor with enhanced sensing properties

Abstract We report on fully inkjet printed carbon nanotubes gas sensors on flexible substrates with improved ethanol sensing characteristics. The sensors were fabricated via two simple steps: printing the electrodes and the carbon nanotubes based - active layer. Carbon nanotubes were functionalized with carboxylic acid (COOH) and poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS). The performance analysis shows a significant enhancement in the sensitivity of the sensor with polymer wrapped nanotubes in comparison with the oxidized nanotubes, with enhancement factors greater than 2.5. Moreover, a remarkable improvement in the sensor response and recovery times after polymer functionalization is noted which bodes well for fully printable environmental sensors on flexible plastic circuits.

[1]  P. Slobodian,et al.  Multi-wall carbon nanotube networks as potential resistive gas sensors for organic vapor detection , 2011 .

[2]  M. Itkis,et al.  Chemistry of single-walled carbon nanotubes. , 2002, Accounts of chemical research.

[3]  J. Wu,et al.  Application of plasma modified multi-wall carbon nanotubes to ethanol vapor detection , 2010 .

[4]  V. Singh,et al.  MWCNT–polymer composites as highly sensitive and selective room temperature gas sensors , 2011, Nanotechnology.

[5]  M. Shkunov,et al.  Inkjet printed PEDOT:PSS/MWCNT nano‐composites with aligned carbon nanotubes and enhanced conductivity , 2014 .

[6]  Hua Bai,et al.  Gas Sensors Based on Conducting Polymers , 2007, Sensors (Basel, Switzerland).

[7]  A. Nasibulin,et al.  Single-walled carbon nanotube networks for ethanol vapor sensing applications , 2013, Nano Research.

[8]  Niraj Sinha,et al.  Carbon nanotube-based sensors. , 2006, Journal of nanoscience and nanotechnology.

[9]  Robert E. Gump,et al.  Carbon nanotube-based ethanol sensors , 2009, Nanotechnology.

[10]  Franco Cacialli,et al.  Oxidised carbon nanotubes as solution processable, high work function hole-extraction layers for organic solar cells , 2009 .

[11]  Michele Penza,et al.  Enhancement of sensitivity in gas chemiresistors based on carbon nanotube surface functionalized with noble metal (Au, Pt) nanoclusters , 2007 .

[12]  Li Niu,et al.  A highly selective chemical gas sensor based on functionalization of multi-walled carbon nanotubes with poly(ethylene glycol) , 2007 .

[13]  Mincheol Chang,et al.  Chemical Sensors Based on Highly Conductive Poly(3,4‐ethylenedioxythiophene) Nanorods , 2005 .

[14]  Dongzhi Zhang,et al.  Characterization of layer-by-layer nano self-assembled carbon nanotube/polymer film sensor for ethanol gas sensing properties , 2014 .

[15]  Xishan Guo,et al.  Gas-sensing characteristics of dielectrophoretically assembled composite film of oxygen plasma-treated SWCNTs and PEDOT/PSS polymer , 2013 .

[16]  T. Kerdcharoen,et al.  All inkjet-printed chemical gas sensors based on CNT/polymer nanocomposites: Comparison between double printed layers and blended single layer , 2012, 2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology.

[17]  E. C. Jesus,et al.  Latest Advances in Modified/Functionalized Carbon Nanotube- Based Gas Sensors , 2013 .

[18]  E. Llobet.  4.4.3 Carbon Nanomaterials for Environmental Monitoring Sensors , 2012 .