Sensors 2006, 6(5), 526-535; doi:10.3390/s6050526
Article

Micro Semiconductor CO Sensors Based on Indium-Doped Tin Dioxide Nanocrystalline Powders

Received: 10 March 2006; Accepted: 10 May 2006 / Published: 10 May 2006
(This article belongs to the Special Issue Gas Sensors)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: The precursors of SnO2 or In2O3/SnO2 nanocrystlline powders have been prepared bythe sol-precipitation method. The precursors were calcined at different temperatures to prepareSnO2 or In2O3/SnO2 nanocrystalline powders with different particle sizes. The nanocrystalliteswere examined by differential thermal analysis (DTA), X-ray diffraction (XRD) andtransmission electron microscopy (TEM). And then thick film CO sensors were fabricated usingprepared SnO2 or In2O3/SnO2 nanocrystlline powders loaded with PdOx. The composition thatgave the highest sensitivity for CO was in the weight% ratio of 5 wt.% In2O3/SnO2:PdOx as99:1(wt %). The composite material was found sensitive against CO at the working temperature200 °C. It was found that the sensors based on In2O3/SnO2 nanocrystalline system exhibitedvery short response time to CO at ppm level. These characteristics make the sensor to be apromising candidate for detecting low concentrations of CO.
Keywords: Micro CO gas sensor; indium oxide; nanocrystalline powders; tin dioxide.
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MDPI and ACS Style

Kim, I.J.; Han, S.D.; Han, C.H.; Gwak, J.; Lee, H.D.; Wang, J.S. Micro Semiconductor CO Sensors Based on Indium-Doped Tin Dioxide Nanocrystalline Powders. Sensors 2006, 6, 526-535.

AMA Style

Kim IJ, Han SD, Han CH, Gwak J, Lee HD, Wang JS. Micro Semiconductor CO Sensors Based on Indium-Doped Tin Dioxide Nanocrystalline Powders. Sensors. 2006; 6(5):526-535.

Chicago/Turabian Style

Kim, Il J.; Han, Sang D.; Han, Chi H.; Gwak, Jihye; Lee, Hi D.; Wang, Jin S. 2006. "Micro Semiconductor CO Sensors Based on Indium-Doped Tin Dioxide Nanocrystalline Powders." Sensors 6, no. 5: 526-535.

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