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Gas and vapor sensing is an important task in the industrial field, both for production and safety, but this item is relevant also in social ground: from soil extraction to terrorism surveillance, there is always a volatile substance to be monitored and quantified. There are many transducing methods to detect gaseous substances and the most common is the so-called electrical nose: an array of gas sensitive semiconductors, such as ZnO, WO3, or other composite oxides, generates a current/voltage change on exposure to pure or mixed substances, and complex software analyzes the sensor response and quantifies the atmosphere composition. Even if it is a very diffuse and powerful device, the electronic nose and, in general, all the electrical gas sensors, suffers from several limitations. First, the oxide semiconductors are sensitive only at high temperature, so these devices are power consuming; moreover, the most …
CRC Press
Publication date: 
5 Jan 2016

Ghenadii Korotcenkov, Monica Terracciano, Jane Politi, Alessandro Caliò, Ilaria Rea, Luca De Stefano

Biblio References: 
Pages: 82-107
Porous Silicon: From Formation to Application: Biomedical and Sensor Applications, Volume Two