Development and Improvement of Carbon Nanotube-Based Ammonia Gas Sensors Using Ink-Jet Printed Interdigitated Electrodes

Gas sensors have been widely used in many applications including environmental monitoring, industrial control, and detection in warfare or for averting security threats. High sensitivity, selectivity, and fast response time are required for application in real-time monitoring and detection of toxic...

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Bibliographic Details
Published in:IEEE transactions on nanotechnology 2013-03, Vol.12 (2), p.255-262
Main Authors: Teerapanich, Pattamon, Myint, M. T. Z., Joseph, C. M., Hornyak, G. L., Dutta, J.
Format: Article
Language:English
Subjects:
Ammonia
Applied sciences
Cross-disciplinary physics: materials science
rheology
Electrodes
Electronics
Exact sciences and technology
gas sensor
General equipment and techniques
Hardware
ink-jet printer
Input-output equipment
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
interdigitated silver electrode (IDE)
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Physics
Resistance
Sensitivity
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Silver
single-walled carbon nanotubes (SWCNTs)
Temperature measurement
Temperature sensors
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Summary:Gas sensors have been widely used in many applications including environmental monitoring, industrial control, and detection in warfare or for averting security threats. High sensitivity, selectivity, and fast response time are required for application in real-time monitoring and detection of toxic gases. Single-walled carbon nanotubes (SWCNTs) provide large specific surface area beneficial for gas adsorption thereby increasing sensor sensitivity. In this paper, ammonia (NH) gas sensors based on SWCNTs were developed using interdigitated silver electrodes printed with nanoparticulate ink on alumina substrates. Simple and inexpensive methods including shaking and dispersion in appropriate solvents were used to debundle SWCNTs for improving sensor response. The fabricated sensors showed a maximum response of 27.3% for 500 ppm NH at room temperature. Detection limit of the sensor devices at room temperature were estimated to be ~3 ppm.
ISSN:1536-125X
1941-0085
1941-0085
DOI:10.1109/TNANO.2013.2242203