Nano Archive

Ethanol and Hydrogen Sensors Based on ZnO Nanoparticles and Nanowires

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