Hydrogen sensors based on carbon nanotubes thin films

Single-walled carbon nanotubes (SWNTs) produced by arc-discharge have been researched as resistive gas sensors for H 2 detection. Raw as well as modified single-walled carbon nanotubes were utilised as sensor material. Two types of modification treatments were carried out on the as grown SWNT materi...

Full description

Saved in:
Bibliographic Details
Published in:Synthetic metals 2005-01, Vol.148 (1), p.15-19
Main Authors: Sayago, I., Terrado, E., Lafuente, E., Horrillo, M.C., Maser, W.K., Benito, A.M., Navarro, R., Urriolabeitia, E.P., Martinez, M.T., Gutierrez, J.
Format: Article
Language:English
Subjects:
Carbon nanotubes
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Functionalization
Gas sensor
General equipment and techniques
Hydrogen
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Materials science
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Single-walled carbon nanotubes (SWNTs) produced by arc-discharge have been researched as resistive gas sensors for H 2 detection. Raw as well as modified single-walled carbon nanotubes were utilised as sensor material. Two types of modification treatments were carried out on the as grown SWNT material; chemical functionalization with palladium and doping with palladium by sputtering. CNTs were deposited on alumina substrates by airbrush. Two different alumina substrates (with and without heater element) were used to obtain the sensor devices. Conductance measurements were carried out in a N 2 constant flow for H 2 detection. The results demonstrate that the CNTs are p-type semiconductor materials, increasing their resistance with reducing gases. SWNTs functionalized with Pd show the best response when exposed to H 2 at room temperature.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2004.09.013