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Electrical-Based Gas Sensing

Chapter

Introduction

Metal oxides represent an assorted and appealing class of materials whose properties cover the entire range from metals to semiconductors and insulators and almost all aspects of material science and physics including superconductivity and magnetism. In the field of chemical sensing, for more than five decades it has been known that the electrical conductivity of semiconductor varies with the composition of the gas atmosphere surrounding them [17].

The first generation of commercial devices was prepared in the 1960s by Taguchi in Japan. They were made of SnO2 prepared by thick-film technology and employed in the warning of possible leaks of explosive gases. This was and is of major importance in densely built-up Japanese cities characterized by wooden houses and widespread gas furnaces. Taguchi established Figaro Engineering Inc., which remains today the major manufacturer of gas sensors.

Since then, the need of cheap, small, low-power-consuming and reliable solid-state...

Keywords

Metal Oxide Pulse Laser Deposition Space Charge Region Electrochemical Potential Sensor Conductance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Sensor Laboratory, CNR-INFM and Brescia UniversityItaly

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