Scientists from Saratov National Research University have for the first time in the world demonstrated a method for detecting inert gases — helium, neon, and argon — by giving them an electrical charge. The technology is protected by a patent.
The method is based on a sensor made of a thin film of tin dioxide. Ionized gases interact with the material, changing its conductivity, which allows determining the type of gas by its individual electrical properties.
When an ion approaches the surface, it takes one electron and knocks out one oxygen atom. This affects the conductivity of the film, and from this response, it is possible to accurately determine which gas the sensor was dealing with.
The development can be used in space research, industry, food and document storage, as well as for the timely detection of gas leaks. This is important because the new method will improve the safety of processes and control substances previously "invisible" to instruments.
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