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

A comparison is made between SnO(2), ZnO, and TiO(2) single-crystal nanowires and SnO(2) 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), cont...

Full description

Saved in:
Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2009-10, Vol.9 (10), p.7866-7902
Main Authors: Vander Wal, Randy L, Berger, Gordon M, Kulis, Michael J, Hunter, Gary W, Xu, Jennifer C, Evans, Laura
Format: Article
Language:English
Subjects:
Adsorption
catalyst
gas analysis
gas detector
Gas detectors
gas sensor
Gases
Grain boundaries
Grain size
integration
metal oxide
Metal oxides
Microscopy
Moon
Morphology
Nanomaterials
Nanoparticles
nanorods
nanostructure
Nanowires
Semiconductors
Temperature
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A comparison is made between SnO(2), ZnO, and TiO(2) single-crystal nanowires and SnO(2) 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 H(2), 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 activation energies for the catalyst-assisted systems.
ISSN:1424-8220
1424-8220
DOI:10.3390/s91007866