Sensor Chemical Reactions in Nanocomposites
A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Materials Science".
Deadline for manuscript submissions: closed (30 December 2023) | Viewed by 2460
Special Issue Editor
Interests: physico-chemical and electrophysical processes in nanosystems; chemical reactions in solid phase; cryochemical reactions
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Dear Colleagues,
In recent years, due to the increase in the content of various harmful impurities in the atmosphere, the number of studies on metal oxide sensors used to detect such impurities has increased significantly. The most common and promising means of detecting harmful and explosive substances in the surrounding atmosphere is semiconductor metal oxide sensors. The detection process is based on the chemical reaction of the analyzed compounds with oxygen chemisorbed on the surface of the semiconductor. As a result of this reaction, electrons captured by the chemisorbed oxygen return to the conduction band of the semiconductor, which leads to an increase in the conductivity of the sensor.
A promising direction for increasing the selectivity and sensitivity of metal oxide sensors is the use of mixed metal oxide systems, which combine metal oxides with various electronic characteristics and chemical properties. Varying the nature and content of components in such systems opens up new possibilities for controlling the intensity and selectivity of the sensory response in the detection of various substances in air. In this regard, the review considers and discusses studies of the structure and sensory properties of nanostructured binary composites consisting of semiconductor metal oxides of various natures as well as various physicochemical processes, including chemical reactions that occur when such sensors detect reducing gases.
Prof. Dr. Leonid I. Trakhtenberg
Guest Editor
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