Study of tungsten point contacts’ electric conductivity  in a complex gas medium

A. S. Klimkin B.Verkin Institute for Low Temperature Physics and Engineering of NAS of Ukraine, 47 Prospekt Nauky., 61103 Kharkov, Ukraine
V. A. Gudimenko B.Verkin Institute for Low Temperature Physics and Engineering of NAS of Ukraine, 47 Prospekt Nauky., 61103 Kharkov, Ukraine
A. O. Gerus B.Verkin Institute for Low Temperature Physics and Engineering of NAS of Ukraine, 47 Prospekt Nauky., 61103 Kharkov, Ukraine
V. V. Fisun B.Verkin Institute for Low Temperature Physics and Engineering of NAS of Ukraine, 47 Prospekt Nauky., 61103 Kharkov, Ukraine
A. P. Pospelov National Technical University “Kharkov Polytechnic Institute”, 21 Frunze Str., Kharkov, 61002, Ukraine
G. V. Kamarchuk B.Verkin Institute for Low Temperature Physics and Engineering of NAS of Ukraine, 47 Prospekt Nauky., 61103 Kharkov, Ukraine

Keywords: Yanson point contact spectroscopy, point contact, sensor, electrochemical synthesis, breath gas

Abstract

The electrical conductivity of tungsten point contacts has been investigated in multicomponent das medium. The complex gas mixture was the human exhaled gas. It has been found that the point contacts (PCs) demonstrate spectral type responses to the action of complex gas media. The spectral character of the time dependence of electrical conductivity is a unique feature observed for the first time on tungsten-based PC sensors in a multicomponent gas medium. The results obtained hold much promise of large-scale investigations on point contacts in multicomponent gas media which can provide the information required to estimate the individual contributions of the gas mixture components to the total response of point contacts.

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