Giulio Tidei
Metal Oxide gas sensors for Volatile Organic Compounds detection.
Rel. Carlo Ricciardi. Politecnico di Torino, Corso di laurea magistrale in Nanotechnologies For Icts (Nanotecnologie Per Le Ict), 2019
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Abstract
Characterization of novel sensing materials for Volatile Organic Compound detectionThe ability to detect, distinguish and categorize odors finds valuable uses in several fields such as automotive, industrial safety and consumer products. Volatile Organic Compounds (VOCs) are of particular relevance in these fields, as key components of many complex mixtures of gases to be detected. The electronic nose (e-nose) is a device which mimics the functionalities of the human nose through an array of gas sensors coupled with machine learning algorithms. One class of sensors used to detect low gas concentrations are the metal-oxide-semiconductor (MOX) gas sensors, sensors which change their conductivity upon gas exposure.
This family of devices are generally made of a single material and are not characterized by an excellent selectivity with respect to different gases; moreover they suffer additional problems like long term stability and interference from the environment
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