Title :
Carbon nanotube-based SAW sensors
Author :
Sayago, I. ; Fernandez, M.J. ; Fontecha, J.L. ; Horrillo, M.C. ; Terrado, E. ; Seral-Ascaso, A. ; Munoz, Eugenio
Author_Institution :
Inst. de Seguridad de la Informacion (GRIDSEN), Madrid, Spain
Abstract :
Surface acoustic wave (SAW) gas sensors based on the use of carbon nanotube (CNT) networks as sensitive layers have been investigated for the detection of atmospheric gas pollutants: volatile organic compounds (VOCs), NO2, CO, and H2 . SAW sensor configuration consists of a delay line made on a piezoelectric substrate (ST -X cut quartz) and a sensitive layer (CNTs) deposited between the interdigital transducers (IDTs). CNT networks were fabricated by airbrushing single-walled-(SWCNTs) and double-walled- (DWCNTs) CNT dispersions onto quartz substrates. Among all the tested CNT materials and gases, only DWCNT -based SAW sensors were sensitive upon exposure to low concentration of octane and toluene, providing fast response and recovery times to these VOCs.
Keywords :
air pollution control; carbon nanotubes; gas sensors; organic compounds; surface acoustic wave transducers; C; CNT materials; CNT networks; CO; H2; IDT; NO2; VOC; atmospheric gas pollutant detection; carbon nanotube-based SAW gas sensors; carbon nanotube-based surface acoustic wave gas sensors; delay line; double-walled-CNT dispersions; interdigital transducers; octane concentration; piezoelectric substrate; quartz substrates; sensitive layer; single-walled-CNT dispersions; toluene concentration; volatile organic compounds; Carbon nanotubes; Films; Frequency measurement; Surface acoustic wave devices; Surface acoustic waves; Carbon nantubes; SAW sensors; VOCs;
Conference_Titel :
Electron Devices (CDE), 2013 Spanish Conference on
Conference_Location :
Valladolid
Print_ISBN :
978-1-4673-4666-5
Electronic_ISBN :
978-1-4673-4667-2
DOI :
10.1109/CDE.2013.6481359
