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Synthesis of Tin Oxide Nanoparticles Using a Mini-arc Plasma Source

Published online by Cambridge University Press:  15 February 2011

Ganhua Lu ,
Junhong Chen  and
Marija Gajdardziska-Josifovska
Ganhua Lu
Affiliation:
Department of Mechanical Engineering and Laboratory for Surface Studies
Junhong Chen
Affiliation:
Department of Mechanical Engineering and Laboratory for Surface Studies
Marija Gajdardziska-Josifovska
Affiliation:
Department of Physics and Laboratory for Surface Studies University of Wisconsin-Milwaukee Milwaukee, WI 53211
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Abstract

Miniaturized electronic noses to rapidly detect and differentiate trace amount of chemical agents are extremely attractive. Use of tin oxide nanoparticles as sensing elements has been proved to significantly improve both the response time and the sensitivity of gas sensors or electronic noses. In this paper, we report the synthesis of pure tin oxide nanoparticles using a simple, convenient, and low-cost mini-arc plasma source. The nanoparticle size distribution is measured online using a scanning electrical mobility spectrometer (SEMS). The product nanoparticles are analyzed ex-situ by high resolution transmission electron microscopy (HRTEM) for morphology, crystal structure, and defects. Non-agglomerated rutile tin oxide (SnO2) nanoparticles as small as a few nm have been produced, with rounded shapes and some faceting on the lowest energy surfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 876: Symposium A – Nanoporous and Nanostructured Materials for Catalysis, Sensor and Gas Separation Applications , 2005 , R8.7
Copyright
Copyright © Materials Research Society 2005

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