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WO 3 nanocrystals: Synthesis and application in highly sensitive detection of acetone

WO 3 nanocrystals: Synthesis and application in highly sensitive detection of acetone,10.1016/j.snb.2011.02.047,Sensors and Actuators B-chemical,Jicha

WO 3 nanocrystals: Synthesis and application in highly sensitive detection of acetone  
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WO3 nanocrystals have been prepared by a sol–gel route and characterized by X-ray diffractometry, scanning electron microscopy, and transmission electron microscopy. The experimental results show that WO3 nanocrystals have a high crystallographic quality and a good dispersivity. The particles’ sizes are in the range of 25–100nm. The fabricated WO3 nanocrystal-based sensors have an excellent sensitivity and selectivity to acetone, and display a rapid response and recovery characteristics. The developed sensors exhibit a detection limit down to 0.05ppm at 300°C, rendering a promising application in noninvasive diagnosis of diabetes. The response mechanism of the WO3 nanocrystal sensor to low concentration of acetone has been discussed based on the depletion layer model.
Journal: Sensors and Actuators B-chemical - SENSOR ACTUATOR B-CHEM , vol. 156, no. 2, pp. 820-824, 2011
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