Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
742169 | Sensors and Actuators B: Chemical | 2013 | 8 Pages |
Abstract
We have investigated the chemiresistive gas sensing characteristics of Fe2O3 thin films for a host of gases (H2S, C2H5OH, CO, NH3, CH4, CO2, NO and Cl2). Fe2O3 films were prepared by thermal oxidation of Fe films, which were deposited on (0 0 0 1) Al2O3 substrate by electron-beam evaporation method. The results of scanning electron microscopy, atomic force microscopy and X-ray diffraction revealed that the grains of these films are composed of nano-crystallites (size ∼32 nm). We demonstrate that these Fe2O3 films show purely n-type conductivity, with high selectivity, moderate response and recovery for H2S in the concentration range of 1–50 ppm.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Vishal Balouria, Arvind Kumar, S. Samanta, A. Singh, A.K. Debnath, Aman Mahajan, R.K. Bedi, D.K. Aswal, S.K. Gupta,