Highly sensitive NO2 gas sensor based on ozone treated graphene

Abstract In the present study, we report a simple and reproducible method to improve the sensing performance of a graphene gas sensor using ozone treatment and demonstrate it with nitrogen dioxide (NO2) gas. The ozone-treated graphene (OTG) sensor demonstrated remarkable enhancement of the sensing performances such as percentage response, detection limit and response time. The percentage response of the OTG sensor was twofold higher than that of a pristine graphene sensor when it was exposed to 200 ppm concentration of NO2 at room temperature. It is noteworthy that significant improvement was achieved in the response time by a factor of 8. Extremely low parts-per-billion (ppb) concentrations were clearly detectable, while the pristine graphene sensor could not detect NO2 molecules below 10 ppm concentration. The detection limit of the OTG sensor was estimated to be 1.3 ppb based on the signal to noise ratio, which is the cutting-edge resolution. The present ozone treatment may provide an effective way to improve the performance of the graphene-based sensor, given its simple process, practical usability and cost effectiveness.

[1]  Kong,et al.  Nanotube molecular wires as chemical sensors , 2000, Science.

[2]  X. Gong,et al.  Chemisorption of NO2 on carbon nanotubes , 2003 .

[3]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[4]  Liqiong Wu,et al.  Reduced graphene oxide electrically contacted graphene sensor for highly sensitive nitric oxide detection. , 2011, ACS nano.

[5]  S. Han,et al.  ADSORPTION PROPERTIES OF HYDROGEN ON (10, 0) SINGLE-WALLED CARBON NANOTUBE THROUGH DENSITY FUNCTIONAL THEORY , 2004 .

[6]  Kwang S. Kim,et al.  Large-scale pattern growth of graphene films for stretchable transparent electrodes , 2009, Nature.

[7]  Luca Francioso,et al.  SOLID STATE GAS SENSORS: STATE OF THE ART AND FUTURE ACTIVITIES , 2003 .

[8]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[9]  Kyeongjae Cho,et al.  Ab Initio Study of Doped Carbon Nanotube Sensors , 2003 .

[10]  Lars Hultman,et al.  Epitaxially grown graphene based gas sensors for ultra sensitive NO2 detection , 2011 .

[11]  Ozone Adsorption on Graphene: Ab Initio Study and Experimental Validation , 2009, 0906.2243.

[12]  E. Snow,et al.  Role of defects in single-walled carbon nanotube chemical sensors. , 2006, Nano letters.

[13]  F. M. Peeters,et al.  Adsorption of H 2 O , N H 3 , CO, N O 2 , and NO on graphene: A first-principles study , 2007, 0710.1757.

[14]  B. Nichols,et al.  Effect of ozone oxidation on single-walled carbon nanotubes. , 2006, The journal of physical chemistry. B.

[15]  R. Ruoff,et al.  All-organic vapor sensor using inkjet-printed reduced graphene oxide. , 2010, Angewandte Chemie.

[16]  K. Novoselov,et al.  Detection of individual gas molecules adsorbed on graphene. , 2006, Nature materials.

[17]  Yugang Sun,et al.  High‐Performance, Flexible Hydrogen Sensors That Use Carbon Nanotubes Decorated with Palladium Nanoparticles , 2007 .

[18]  Jason L. Johnson,et al.  Experimental study of graphitic nanoribbon films for ammonia sensing , 2011 .

[19]  S. Banerjee,et al.  Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils , 2009, Science.

[20]  Dan Li,et al.  Graphene/Polyaniline Nanocomposite for Hydrogen Sensing , 2010 .

[21]  Jiaxing Huang,et al.  Steam etched porous graphene oxide network for chemical sensing. , 2011, Journal of the American Chemical Society.

[22]  Yi Xuan,et al.  Atomic-layer-deposited nanostructures for graphene-based nanoelectronics , 2008 .

[23]  Qian Wang,et al.  Toward Large Arrays of Multiplex Functionalized Carbon Nanotube Sensors for Highly Sensitive and Selective Molecular Detection. , 2003, Nano letters.

[24]  Zhongqing Wei,et al.  Reduced graphene oxide molecular sensors. , 2008, Nano letters.

[25]  Zhigang Chen,et al.  Highly aligned SnO2 nanorods on graphene sheets for gas sensors , 2011 .

[26]  L. Ocola,et al.  Gas detection using low-temperature reduced graphene oxide sheets , 2009 .

[27]  B. H. Weiller,et al.  Practical chemical sensors from chemically derived graphene. , 2009, ACS nano.

[28]  Cai-Hong Liu,et al.  Improving gas sensing properties of graphene by introducing dopants and defects: a first-principles study , 2009, Nanotechnology.