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dc.contributor.authorRout, Chandra Sekhar-
dc.contributor.authorHegde, Manu-
dc.contributor.authorGovindaraj, A-
dc.contributor.authorRao, C N R-
dc.identifier.citationNanotechnology 18(20), 205504-(1-9) (2007)en_US
dc.descriptionRestricted Accessen_US
dc.description.abstractAmmonia 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.en_US
dc.publisherIOP Publishing Ltden_US
dc.rights© 2007 IOP Publishing Ltden_US
dc.subjectSensing Characteristicsen_US
dc.subjectGas Sensoren_US
dc.subjectIn2o3 Ceramicsen_US
dc.subjectZno Nanorodsen_US
dc.subjectNh3 Gasen_US
dc.titleAmmonia sensors based on metal oxide nanostructuresen_US
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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