Nano Archive

Nanocasting Synthesis of Ultrafine WO3 Nanoparticles for Gas Sensing Applications

Kamali Heidari, Elham and Marzbanrad, Ehsan and Zamani, Cyrus and Raissi, Babak (2009) Nanocasting Synthesis of Ultrafine WO3 Nanoparticles for Gas Sensing Applications. Nanoscale Research Letters, 5 (2). pp. 370-373.

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Official URL: http://www.springerlink.com/content/g2047747050518...

Abstract

Ultrafine WO3 nanoparticles were synthesized by nanocasting route, using mesoporous SiO2 as a template. BET measurements showed a specific surface area of 700 m2/gr for synthesized SiO2, while after impregnation and template removal, this area was reduced to 43 m2/gr for WO3 nanoparticles. HRTEM results showed single crystalline nanoparticles with average particle size of about 5 nm possessing a monoclinic structure, which is the favorite crystal structure for gas sensing applications. Gas sensor was fabricated by deposition of WO3 nanoparticles between electrodes via low frequency AC electrophoretic deposition. Gas sensing measurements showed that this material has a high sensitivity to very low concentrations of NO2 at 250°C and 300°C.

Item Type:Article
Uncontrolled Keywords:WO3 - Nanocasting - Low frequency AC electrophoretic deposition - NO2 gas sensor
Subjects:Material Science > Functional and hybrid materials
Material Science > Nanofabrication processes and tools
Analytical Science > Nanotechnology for sensing and actuating
Technology > Manufacturing processes for nanotechnology
ID Code:8154
Deposited By:Lesley Tobin
Deposited On:22 Mar 2010 14:06
Last Modified:22 Mar 2010 14:06

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