Dear Colleagues,

The design and fabrication of effective methods and devices, which are capable of quickly, reliably, and precisely defining the qualitative and quantitative composition of atmospheric air, are urgent scientific and technical problems today.

In the context of human safety, health, and quality of life, there has been a significant increase in research on developing sensors (optical, electrical, electrochemical, mass sensitive, magnetic, thermometric, chemical, and biochemical) which are able to collect signals, resulting in novel functional principles useful to global monitoring of ambient air.

Firstly, the global monitoring system will lead to reducing the risk of irreversible climate change. Nitrogen oxides and sulfur dioxide emitted from coal- and black oil-fired thermal power plants cause acid rain, global warming, and produce ozone that leads to the formation of serious megalopolis smog via photochemical reactions.

Secondly, the use of gas sensors reduces the probability of technological accidents connected with the leakage of explosive and toxic gases. These gas sensors can be an integral part of specific devices but could also be embedded or connected to widespread technology (e.g., smartphones), thus widening their potential use in a variety of different scenarios (e.g., self-measurement), which will increase personnel safety.

The goal of this Special Issue is to provide a survey of the gas sensing state of the art and to present the latest research, with particular focus on the promising technologies, materials (metal oxide compositions, doped materials, nanostuctures of various morphologies and architecture, graphene-based nanostructures, nanostructures with surface modulation and modification, “electronic nose”, etc.), and dynamic modeling for effective control of ambient air pollutions.

Contributions to this Special Issue are invited from groups active in this field of research, through original papers and focused reviews.

• Metal oxide semiconductors
• Material for SAW gas sensors
• Optical gas sensors
• Electrochemical gas sensors
• Graphene-based nanostructures
• Materials with perovskite structures
• Doped nanostructures
• Nanostructures with modified surfaces

Prof. Dr. Alexander M. Samoylov
Guest Editor

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