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

Randy L. van der Wal, Gordon M. Berger, Michael J. Kulis, Gary W. Hunter, Jennifer C. Xu, Laura Evans

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

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 temperaturedependent data, Arrhenius analyses are made to determine activation energies for the catalyst-assisted systems.

Original languageEnglish (US)
Pages (from-to)7866-7902
Number of pages37
JournalSensors
Volume9
Issue number10
DOIs
StatePublished - Oct 2009

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Synthesis methods, microscopy characterization and device integration of nanoscale metal oxide semiconductors for gas sensing'. Together they form a unique fingerprint.

Cite this