Preparation and gas sensing properties of nanocrystalline La-doped CoTiO3

p-Type semiconducting nanocrystalline CoTiO3:La (2at.%) was synthesized via polyol method. X-ray diffraction (XRD) was used to confirm the materials structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to image the materials morphology. Thick films of th...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2006-12, Vol.120 (1), p.110-118
Main Authors: Siemons, Maike, Simon, Ulrich
Format: Article
Language:English
Subjects:
Doping
Ethyl alcohol
Nanocrystals
Nitrogen dioxide
Palladium
Scanning electron microscopy
Thick films
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Summary:p-Type semiconducting nanocrystalline CoTiO3:La (2at.%) was synthesized via polyol method. X-ray diffraction (XRD) was used to confirm the materials structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to image the materials morphology. Thick films of the nanocrystalline material were applied with a laboratory roboting system to an 8X8 multielectrode substrate, developed for high-throughput impedance spectroscopy (HTIS). With this method it was shown that the base material doped with various metals (Au, Ce, Ir, Pd, Pt, Rh, Ru) in different concentrations (0.2-0.6at.%) is applicable for the fast detection of ethanol, propylene and NO2, depending on the surface doping and the operation temperature.
ISSN:0925-4005
DOI:10.1016/j.snb.2006.01.049