Highly sensitive ethanol sensors based on nanocrystalline SnO2 thin films

A simple and inexpensive ultrasonic spray pyrolysis method was used to synthesise agglomerate-free nanosized SnO2 particles with a size < 10 nm. SEM, TEM and high resolution XRD studies were used to characterise the morphology, crystallinity, and structure of the SnO2 particles. Under the optimis...

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Bibliographic Details
Published in:Current applied physics 2010, 10(5), , pp.1249-1254
Main Authors: Patil, L A, Shinde, M D, Bari, A R, Deo, V V
Format: Article
Language:English
Subjects:
Ethanol
Ethyl alcohol
Nanocrystals
Nanostructure
Sensors
Thin films
Tin dioxide
Tin oxides
물리학
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Summary:A simple and inexpensive ultrasonic spray pyrolysis method was used to synthesise agglomerate-free nanosized SnO2 particles with a size < 10 nm. SEM, TEM and high resolution XRD studies were used to characterise the morphology, crystallinity, and structure of the SnO2 particles. Under the optimised experimental conditions, the prepared SnO2 sensor shows a high response (S = 491) towards 100 ppm ethanol gas at 300 C, linearity in the range of 100-500 ppm, quick response time (2 s), recovery time (60 s) and selectivity against other gases. The response of the sensor was monitored in the temperature range 250-450 C. The seven fold enhancement in gas response and selective detection of C2H5OH in the presence of other gases such as CH3OH and CH3CHOHCH3 are significant. These results show that pure nanocrystalline SnO2 thin film can be used as a sensing material for high performance ethanol sensors.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2010.03.002