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Flame Made Nanoparticles for Gas Sensors

L. M├Ądler, S.E. Pratsinis, T. Sahm, A. Gurlo, N. Barsan and U. Weimar
University of California, Los Angeles, CH

Keywords:
gas sensor, aersol synthesis, spray flame, CO detection, Pt/SnO2

Abstract:
Flame aerosol technology is one of the most widely used synthesis routes in manufacturing of commercial quantities of nanoparticles. The application of flame spray pyrolysis further broadens the spectrum of flame made powders and their use in various applications as there are more liquid than gaseous precursors available. Even particles with pre-defined stoichiometric composition can be produced. The flame-made SnO2 nanoparticles showed high and fast response to both reducing (propanal) and oxidizing (NO2) gases. In-situ flame deposition of Pt and Pd on SnO2 nanoparticles, which is known to be a good method for promoting the detection of CO, is also explored for a new generation of tailor-made sensors from gas phase derived fine powders in this work.

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