Please use this identifier to cite or link to this item:
Title: Ammonia sensors based on metal oxide nanostructures
Authors: Rout, Chandra Sekhar
Hegde, Manu
Govindaraj, A
Rao, C N R
Keywords: Sensing Characteristics
Gas Sensor
In2o3 Ceramics
Zno Nanorods
Nh3 Gas
Issue Date: 23-May-2007
Publisher: IOP Publishing Ltd
Citation: Nanotechnology 18(20), 205504-(1-9) (2007)
Abstract: Ammonia sensing characteristics of nanoparticles as well as nanorods of ZnO, In2O3 and SnO2 have been investigated over a wide range of concentrations ( 1-800 ppm) and temperatures ( 100-300 degrees C). The best values of sensitivity are found with ZnO nanoparticles and SnO2 nanostructures. Considering all the characteristics, the SnO2 nanostructures appear to be good candidates for sensing ammonia, with sensitivities of 222 and 19 at 300 degrees C and 100 degrees C respectively for 800 ppm of NH3. The recovery and response times are respectively in the ranges 12-68 s and 22-120 s. The effect of humidity on the performance of the sensors is not marked up to 60% at 300 degrees C. With the oxide sensors reported here no interference for NH3 is found from H-2, CO, nitrogen oxides, H2S and SO2.
Description: Restricted Access
Other Identifiers: 0957-4484
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

Files in This Item:
File Description SizeFormat 
2007 Nanotechnology, 18, 205504.pdf
  Restricted Access
1.75 MBAdobe PDFView/Open Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.