Tin oxide nanowire sensors for highly sensitive detection of the toxic gas H2S

A. Köck; E. Brunet; G. C. Mutinati; T. Maier; S. Steinhauer

doi:10.1117/12.883899

26 May 2011 Tin oxide nanowire sensors for highly sensitive detection of the toxic gas H₂S

A. Köck, E. Brunet, G. C. Mutinati, T. Maier, S. Steinhauer

Proceedings Volume 8024, Advanced Environmental, Chemical, and Biological Sensing Technologies VIII; 80240S (2011) https://doi.org/10.1117/12.883899
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

We have realized gas sensor devices, which are based on a single SnO₂-nanowire or a multiple SnO₂-nanowire network as gas sensing components and are very sensitive to the toxic gas H₂S. The nanowires are fabricated in a two-step atmospheric pressure synthesis process directly on the Si-chip by spray pyrolysis and subsequent annealing. Exposure of the single SnO₂-nanowire sensor H₂S with a concentration of only 1.4 ppm decreases the resistance by ~ 30%, while the multiple SnO₂-nanowire network sensor exhibits a resistance decrease by ~ 90%. The nanowire sensors have extraordinary sensitivity with resolution limit in the ppb range and are able to measure concentrations well below the threshold limit value of 10 ppm. Due to their high performance the nanowire based sensors are basically suited for the realization of smart gas sensing devices for personal safety issues as well as industrial applications.

Citation Download Citation

A. Köck, E. Brunet, G. C. Mutinati, T. Maier, and S. Steinhauer "Tin oxide nanowire sensors for highly sensitive detection of the toxic gas H₂S", Proc. SPIE 8024, Advanced Environmental, Chemical, and Biological Sensing Technologies VIII, 80240S (26 May 2011); https://doi.org/10.1117/12.883899

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