Rout, Chandra Sekhar and Raju, A. R. and Govindaraj, Achutharao and Rao, C. N. R. (2007) Ethanol and Hydrogen Sensors Based on ZnO Nanoparticles and Nanowires. Journal of NANOSCIENCE and NANOTECHNOLOGY, 7 (6). pp. 1923-1929.
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Abstract
Hydrogen sensing characteristics of thick films of nanoparticles of ZnO and 3% Mn or Co doped ZnO with and without impregnation of 1% Pt have been investigated over a wide concentration range. The sensor characteristics of the Pt impregnated ZnO and 3% Mn or Co-doped ZnO nanoparticles are found to be excellent with the sensitivity reaching values in the 1000-1500 range for 1000 ppm of H2 at 125 °C or lower. The sensitivity is quite high even for 10 ppm of H2. The response and recovery times are generally less than 10 s in the region of high sensitivity. These films exhibit very good sensing characteristics for ethanol, the sensitivity being well above 2000 at 50 °C for 1000 ppm of vapour. Nanowires of Pt-impregnated ZnO also exhibit satisfactory sensing characteristics, but the values of the sensitivity are somewhat lower. Humidity has negligible effect on the performance of these sensors.
| Item Type: | Article |
|---|---|
| Subjects: | Material Science > Nanochemistry |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Physics Faculty of Engineering, Science and Mathematics > School of Chemistry |
| ID Code: | 3424 |
| Deposited By: | JNCASR |
| Deposited On: | 20 Jan 2009 10:58 |
| Last Modified: | 08 Apr 2009 11:48 |
Repository Staff Only: item control page
