Role of the Material Electrodes on Resistive Behaviour of Carbon Nanotube-Based Gas Sensors for H2S Detection
Joint Authors
Terranova, M. L.
Toschi, F.
Lucci, M.
Orlanducci, S.
Guglielmotti, V.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-06-03
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Miniaturized gas-sensing devices that use single-walled carbon nanotubes as active material have been fabricated using two different electrode materials, namely, Au/Cr and NbN.
The resistive sensors have been assembled aligning by dielectrophoresis the nanotube bundles between 40 μm spaced Au/Cr or NbN multifinger electrodes.
The sensing devices have been tested for detection of the H2S gas, in the concentration range 10–100 ppm, using N2 as carrier gas.
No resistance changes were detected using sensor fabricated with NbN electrodes, whereas the response of the sensor fabricated with Au/Cr electrodes was characterized by an increase of the resistance upon gas exposure.
The main performances of this sensor are a detection limit for H2S of 10 ppm and a recovery time of few minutes.
The present study suggests that the mechanism involved in H2S gas detection is not a direct charge transfer between molecules and nanotubes.
The hypothesis is that detection occurs through passivation of the Au surfaces by H2S molecules and modification of the contact resistance at the Au/nanotube interface.
American Psychological Association (APA)
Lucci, M.& Toschi, F.& Guglielmotti, V.& Orlanducci, S.& Terranova, M. L.. 2012. Role of the Material Electrodes on Resistive Behaviour of Carbon Nanotube-Based Gas Sensors for H2S Detection. Journal of Sensors،Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-465702
Modern Language Association (MLA)
Lucci, M.…[et al.]. Role of the Material Electrodes on Resistive Behaviour of Carbon Nanotube-Based Gas Sensors for H2S Detection. Journal of Sensors No. 2012 (2012), pp.1-6.
https://search.emarefa.net/detail/BIM-465702
American Medical Association (AMA)
Lucci, M.& Toschi, F.& Guglielmotti, V.& Orlanducci, S.& Terranova, M. L.. Role of the Material Electrodes on Resistive Behaviour of Carbon Nanotube-Based Gas Sensors for H2S Detection. Journal of Sensors. 2012. Vol. 2012, no. 2012, pp.1-6.
https://search.emarefa.net/detail/BIM-465702
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-465702