DocumentCode :
2126173
Title :
SnO2/NiO composite thin films for formaldehyde detection
Author :
Dunford, Jeffrey L. ; Tunney, Jim J. ; Du, Xiaomei
Author_Institution :
Inst. of Chem. Process & Environ. Technol., Nat. Res. Council Canada, Ottawa, ON, Canada
fYear :
2010
fDate :
1-4 Nov. 2010
Firstpage :
1500
Lastpage :
1503
Abstract :
Formaldehyde (HCHO) is a volatile organic compound that outgasses from textiles and composite wood products, with adverse health effects resulting from prolonged exposure to concentrations of ~10 ppb in air. Commercially available HCHO sensors struggle to detect HCHO at such low concentrations. Tin dioxide (SnO2) / nickel oxide (NiO) poly crystalline composite films have shown sensitivity to ~ 100 ppb via resistance measurements. Here we explore several thin Snθ2/NiO films produced by pulsed laser deposition (PLD), varying preparation parameters including NiO loading and substrate temperature during deposition. These variables are shown to affect both composition and morphology, as characterized by XPS, XRD, SEM, and SEM-EDX. Here we report the response time and sensitivity of these sensor materials to HCHO concentrations from ~10 ppb to 1000 ppb at various operating temperatures.
Keywords :
X-ray chemical analysis; X-ray diffraction; X-ray photoelectron spectra; chemical sensors; composite materials; electric resistance measurement; nickel compounds; organic compounds; pulsed laser deposition; scanning electron microscopy; thin film sensors; tin compounds; HCHO sensor; SEM-EDX; SnO2-NiO; XPS; XRD; formaldehyde detection; nickel oxide; polycrystalline composite thin film; pulsed laser deposition; resistance measurement; tin dioxide; volatile organic compound;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sensors, 2010 IEEE
Conference_Location :
Kona, HI
ISSN :
1930-0395
Print_ISBN :
978-1-4244-8170-5
Electronic_ISBN :
1930-0395
Type :
conf
DOI :
10.1109/ICSENS.2010.5690349
Filename :
5690349
Link To Document :
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