Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9700884 | Sensors and Actuators B: Chemical | 2005 | 5 Pages |
Abstract
In this paper, ammonia-sensing behavior of barium strontium titanate (BST) thin films have been reported for the first time. Thin films of BST deposited by sol-gel spin coating technique have been found to show an increase in resistance when exposed to ammonia gas. The sensitivity variation was from 20 to 60%, with lowest detection limit of about 160 ppm. The films were prepared with different pre-sintering temperatures and thickness and effect of these parameters on the ammonia-sensing have been studied. The optimum temperature for operation was found to be close to 270 °C. The ammonia-sensing studies were also performed for other gases like ethanol, NO2 and CO; but the sensitivity in these cases was negligibly smaller than that in case of ammonia.
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Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Somnath C. Roy, G.L. Sharma, M.C. Bhatnagar, S.B. Samanta,