NO2 Sensing with SWCNT Decorated by Nanoparticles in Temperature Pulsed Mode: Modeling and Characterization

In this paper, NO2 sensing by means of single-wall carbon nanotubes (SWCNT) networks, decorated with nanoparticles of TiO2 and Au, is proposed. In particular, it is shown that the performance of these materials can be enhanced using pulsed temperature mode. This sensing strategy effectiveness is theoretically and experimentally assessed. In this paper, in fact, a dynamic model for conductive gas sensors formed by networks of nanowires, considering the junctions between different wires as the main contribution to sensor conductance, and in the presence of the target gas, is presented and validated. The model accounts for variable temperature and gas concentration and sheds some light on the mechanisms leading to the sensor response improvement related to temperature pulsed working mode. It is also shown how the addition of a different material can be modeled through different surface adsorption kinetics.

[1]  Viera Skakalova,et al.  Modelling conduction in carbon nanotube networks with different thickness, chemical treatment and irradiation , 2008 .

[2]  I. Zaporotskova,et al.  Carbon nanotubes: Sensor properties. A review , 2016 .

[3]  Yukihiko Matsumura,et al.  Effects of physical and chemical adsorption on the electric conductance of carbon nanotube films , 2018 .

[4]  D. Wen,et al.  Functionalization and densification of inter-bundle interfaces for improvement in electrical and thermal transport of carbon nanotube fibers , 2016 .

[5]  Jose Maria Kenny,et al.  Sensors for sub-ppm NO2 gas detection based on carbon nanotube thin films , 2003 .

[6]  Ghenadii Korotcenkov,et al.  Engineering approaches for the improvement of conductometric gas sensor parameters: Part 1. Improvement of sensor sensitivity and selectivity (short survey) , 2013 .

[7]  A. Afzal,et al.  NOx sensors based on semiconducting metal oxide nanostructures: Progress and perspectives , 2012 .

[8]  Ada Fort,et al.  Simplified models for SnO2 sensors during chemical and thermal transients in mixtures of inert, oxidizing and reducing gases , 2007 .

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

[10]  G. Korotcenkov.  Metal oxides for solid-state gas sensors: What determines our choice? , 2007 .

[11]  V. Brynzari,et al.  Simulation of thin film gas sensors kinetics , 1999 .

[12]  Derek R. Miller,et al.  Nanoscale metal oxide-based heterojunctions for gas sensing: A review , 2014 .

[13]  John J Boland,et al.  Electrical connectivity in single-walled carbon nanotube networks. , 2009, Nano letters.

[14]  F. Cheng,et al.  Study on oxygen and nitrogen adsorption in carbon nanotube , 2008, 2008 2nd IEEE International Nanoelectronics Conference.

[15]  A. Flammini,et al.  Model and Experimental Characterization of the Dynamic Behavior of Low-Power Carbon Monoxide MOX Sensors Operated With Pulsed Temperature Profiles , 2009, IEEE Transactions on Instrumentation and Measurement.

[16]  Yoshihiro Tomita,et al.  Principles of detection mechanism for adsorbed gases using carbon nanotube nanomat , 2018, Chemical Physics Letters.

[17]  Sheikh A. Akbar,et al.  Conduction mechanisms in SnO2 single-nanowire gas sensors: An impedance spectroscopy study , 2017 .

[18]  Sinclair S. Yee,et al.  Transition between neck-controlled and grain-boundary-controlled sensitivity of metal-oxide gas sensors , 1995 .

[19]  Ada Fort,et al.  Assessment and Optimization for Novel Gas Materials Through the Evaluation of Mixed Response Surface Models , 2015, IEEE Transactions on Instrumentation and Measurement.

[20]  N. Bârsan,et al.  Conduction Model of Metal Oxide Gas Sensors , 2001 .

[21]  D. Jana,et al.  Scaling description of non-ohmic direct current conduction in disordered systems , 2015 .

[22]  Tommaso Addabbo,et al.  Co3O4/Al-ZnO Nano-composites: Gas Sensing Properties , 2019, Sensors.

[23]  Ralf Moos,et al.  Morphology dependence of thermopower and conductance in semiconducting oxides with space charge regions , 2008 .

[24]  Olfa Kanoun,et al.  Highly Sensitive Detection of NO2 by Au and TiO2 Nanoparticles Decorated SWCNTs Sensors , 2019, Sensors.

[25]  Shadpour Mallakpour,et al.  Carbon nanotube–metal oxide nanocomposites: Fabrication, properties and applications , 2016 .

[26]  Ada Fort,et al.  High accuracy measurements of new conductometric metal oxide gas sensors by efficient control of working conditions , 2013 .

[27]  A. Nag,et al.  Carbon nanotubes and its gas-sensing applications: A review , 2019, Sensors and Actuators A: Physical.

[28]  F Cleri,et al.  Turning carbon nanotubes from exceptional heat conductors into insulators. , 2009, Physical review letters.

[29]  Kengo Shimanoe,et al.  Roles of Shape and Size of Component Crystals in Semiconductor Gas Sensors I. Response to Oxygen , 2008 .

[30]  N. Shaalan,et al.  Influence of morphology and structure geometry on NO2 gas-sensing characteristics of SnO2 nanostructures synthesized via a thermal evaporation method , 2011 .

[31]  Shuangchen Ruan,et al.  Recent development in nanocarbon materials for gas sensor applications , 2018, Sensors and Actuators B: Chemical.

[32]  A. Fort,et al.  Metal-oxide nanowire sensors for CO detection: Charaterization and modeling , 2010, 2010 IEEE Sensors Applications Symposium (SAS).

[33]  Masashi Shiraishi,et al.  Conduction mechanisms in single-walled carbon nanotubes , 2002 .

[34]  Tommaso Addabbo,et al.  Versatile measurement system for the characterization of gas sensing materials , 2013, 2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC).

[35]  Eusebiu Ilarian Ionete,et al.  A Room Temperature Gas Sensor Based on Sulfonated SWCNTs for the Detection of NO and NO2 , 2019, Sensors.

[36]  C. Lieber,et al.  Atomic structure and electronic properties of single-walled carbon nanotubes , 1998, Nature.

[37]  A. Rinzler,et al.  Electronic structure of atomically resolved carbon nanotubes , 1998, Nature.