Gas sensing properties of Zn-doped anisometric Fe2O3 nanoparticles

Taeyang Kim, Andrew C. Sharp, Hoon Yim, Bing Guo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, we synthesized nanocrystalline Zn-doped γ-Fe 2O3 by flame spray pyrolysis under different conditions, and then investigated the gas sensing characteristics of these particles. Transmission electron microscopy (TEM) was employed to characterize the particles. Gas sensors were fabricated by applying the as-synthesized particles on interdigitated electrodes. The response of the gas sensor to acetone vapor in dry synthetic air was measured before and after 3 days of aging. High-temperature flame (H2/O2diffusion) generated nanometer-sized particles; lower temperature flame (H2/Air diffusion) generated micrometer-sized particles. The Zn-doped Fe2O3 nanoparticles showed a gas sensing sensitivity that was 20 times the literature value. [1]The 3-day aging did not cause deterioration in gas sensing ability of. the Zn-doped Fe2O3 nanoparticles. However, the microparticles lost their gas sensing ability after aging. The results showed that the flame synthesized γ-Fe2O3 particles had high gas sensing signal, and were more resistant toward aging than the microparticles.

Original languageEnglish
Title of host publicationNanotechnology 2009
Subtitle of host publicationFabrication, Particles, Characterization, MEMS, Electronics and Photonics - Technical Proceedings of the 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009
Pages550-553
Number of pages4
Publication statusPublished - 26 Nov 2009
EventNanotechnology 2009: Fabrication, Particles, Characterization, MEMS, Electronics and Photonics - 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009 - Houston, TX, United States
Duration: 3 May 20097 May 2009

Publication series

NameNanotechnology 2009: Fabrication, Particles, Characterization, MEMS, Electronics and Photonics - Technical Proceedings of the 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009
Volume1

Other

OtherNanotechnology 2009: Fabrication, Particles, Characterization, MEMS, Electronics and Photonics - 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009
CountryUnited States
CityHouston, TX
Period3/5/097/5/09

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Keywords

  • Aging
  • Flame spray pyrolysis
  • Gas sensing
  • Sensitivity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kim, T., Sharp, A. C., Yim, H., & Guo, B. (2009). Gas sensing properties of Zn-doped anisometric Fe2O3 nanoparticles. In Nanotechnology 2009: Fabrication, Particles, Characterization, MEMS, Electronics and Photonics - Technical Proceedings of the 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009 (pp. 550-553). (Nanotechnology 2009: Fabrication, Particles, Characterization, MEMS, Electronics and Photonics - Technical Proceedings of the 2009 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2009; Vol. 1).