NDLI: Synthesis methods, microscopy characterization and device integration of nanoscale metal oxide semiconductors for gas sensing in aerospace applications

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Synthesis methods, microscopy characterization and device integration of nanoscale metal oxide semiconductors for gas sensing in aerospace applications

Content Provider	NASA Technical Reports Server (NTRS)
Author	Kulis, Michael J. Xu, Jennifer C. Berger, Gordon M. Hunter, Gary W. VanderWal, Randy L. Evans, Laura J.
Copyright Year	2009
Description	A comparison is made between SnO2, ZnO, and TiO2 single-crystal nanowires and SnO2 polycrystalline nanofibers for gas sensing. Both nanostructures possess a one-dimensional morphology. Different synthesis methods are used to produce these materials: thermal evaporation-condensation (TEC), controlled oxidation, and electrospinning. Advantages and limitations of each technique are listed. Practical issues associated with harvesting, purification, and integration of these materials into sensing devices are detailed. For comparison to the nascent form, these sensing materials are surface coated with Pd and Pt nanoparticles. Gas sensing tests, with respect to H2, are conducted at ambient and elevated temperatures. Comparative normalized responses and time constants for the catalyst and noncatalyst systems provide a basis for identification of the superior metal-oxide nanostructure and catalyst combination. With temperature-dependent data, Arrhenius analyses are made to determine an activation energy for the catalyst-assisted systems.
File Size	15277917
Page Count	30
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20090019027
Archival Resource Key	ark:/13960/t0zp91222
Language	English
Publisher Date	2009-03-01
Access Restriction	Open
Subject Keyword	Metals And Metallic Materials Nanoparticles Metal Oxides Single Crystals Metal Oxide Semiconductors Nanostructure Characteristics Catalysts Polycrystals Gas Analysis Nanowires Nanostructures Devices Nanotechnology Aerospace Engineering Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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