Next Article in Journal
Reticulation of Aqueous Polyurethane Systems Controlled by DSC Method
Next Article in Special Issue
Development of an In-Fiber Nanocavity Towards Detection of Volatile Organic Gases
Previous Article in Journal
Light Dependent Resistance as a Sensor in Spectroscopy Setups Using Pulsed Light and Compared with Electret Microphones
Previous Article in Special Issue
CNT Sensors for Detecting Gases with Low Adsorption Energy by Ionization
Sensors 2006, 6(5), 526-535; doi:10.3390/s6050526
Article

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

1,* , 2,* , 2
, 2
, 1
 and 1
1 Department of Electronics Engineering, Chungnam National University, Daejeon, South Korea 2 Optic and Electric Materials Center, Korea Institute of Energy Research, Daejeon, South Korea
* Authors to whom correspondence should be addressed.
Received: 10 March 2006 / Accepted: 10 May 2006 / Published: 10 May 2006
(This article belongs to the Special Issue Gas Sensors)
View Full-Text   |   Download PDF [436 KB, uploaded 20 June 2014]   |   Browse Figures

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. Micro CO gas sensor; indium oxide; nanocrystalline powders; tin dioxide.
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.

Share & Cite This Article

Export to BibTeX |
EndNote


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.

View more citation formats

Related Articles

Article Metrics

Comments

Citing Articles

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert