Gas Sensing Properties of Zn-Doped Anisometric Fe(2)O(3) Nanoparticles Conference Paper uri icon


  • In this study, we synthesized nanocrystalline Zn-doped γ-Fe 2 O 3 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 (H 2 /O 2 diffusion) generated nanometer-sized particles; lower temperature flame (H 2 /Air diffusion) generated micrometer-sized particles. The Zn-doped Fe 2 O 3 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 Fe 2 O 3 nanoparticles. However, the microparticles lost their gas sensing ability after aging. The results showed that the flame synthesized γ-Fe 2 O 3 particles had high gas sensing signal, and were more resistant toward aging than the microparticles.

author list (cited authors)

  • Kim, T., Sharp, A. C., Yim, H., & Guo, B.

publication date

  • November 2009