Metal Oxide Nanostructures as Gas Sensing Devices

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Gas-Sensing Materials and Devices

More than 50 years ago, Brattain and Bardeen [12] discovered that gas

adsorption onto a semiconductor produces a change in the electrical con-

ductance of the material. From that time onward, a detailed study on semi-

conducting materials was carefully done with a variety of gaseous species

that brought about electrical changes. A great amount of research was car-

ried out in order to realize commercial semiconducting devices based on this

principle. The rst proposal for this type of devices came in 1962 by Seiyama

et al. [13] and a patent by Taguchi [10]. From this point onward, many more

devices ...