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Title Study on the Ozone gas sensing properties of Al­doped NiO thin films
Author Παραλίκης, Αθανάσιος
Thesis advisor Μπίνας, Βασίλειος
Reviewer Μακρής, Κωνσταντίνος
Απεραθίτης, Ηλίας
Abstract Ever since the industrial revolution, mankind has been producing enormous amounts of gases that would otherwise not be present in the ambient environment in such quantities or at all. These gases are either products from or reactants to a chemical reaction and exist in both industrial and urban areas. A key component to the reasoning behind the monitoring of such gases is that, even though some of them can occur organically in nature, the sheer amount generated from mankind is more than enough to cause irreversible problems to both humans (health issues) and nature (damage to flora and fauna, climate change etc.). To tackle the effects of these compounds, they first need to be detected either macroscopically (concentration and total mass of a gas in a macroscopic environment such as a metropolitan area, a country, or the whole planet) or mesoscopically (concentration and total mass of a gas in a mesoscopic environment such as a room, a house, or a working facility). For this task, a wide range of gas sensors/detectors has been invented. Gas sensors are devices that can detect a gas through a change that occurs in the medium which they use and can translate that change into some kind of signal that provides valuable information about the targeted compound. One of the most wide spread techniques for gas detection is the use of Semiconductor Metal Oxides (S.M.O.), as they offer a great amount of advantages, one of which is the numerous different compounds that can be produced, being that they are easily modified. The main mechanism that governs these kinds of sensors is the alteration of the current flowing through them whilst being and not being in contact with the target gas. In this thesis Aluminum doped Nickel oxide thin films have been employed for the detection of ozone using amperometric measurements and have been characterised with three different techniques (XRD, FESEM, UV­Vis). The reason behind ozone being selected as the target gas, is that it constitutes a hazard and has been increasing in concentration in the troposphere, making it a dangerous compound that could harm both humans and animals alike. Something worth mentioning is that there has not been any projects regarding the detection of ozone using Aluminum doped Nickel oxide (Al:NiO).
Language English
Issue date 2021-03-24
Collection   School/Department--School of Sciences and Engineering--Department of Physics--Graduate theses
  Type of Work--Graduate theses
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