N.N. Usmanov1, D.L. Stolyarov2, I.R. Prudnikov3, V.Y. Ivanov4, A.M. Saletsky5

1,3,4,5 Faculty of Physics of Lomonosov Moscow State University (Moscow, Russia),  2  Skobeltsyn Institute of Nuclear Physics of Lomonosov Moscow State University (Moscow, Russia)

The possibility of practical application of the results of investigations of air environmental pressure changes in the vicinity of a conductor in which electric current flows is shown. The one-to-one match of environmental pressure changes to alterations of electric current can be applied under transfer of a regulated movement to mobile parts of micro and nanodevices. In accordance with the trends in the development of fields science and industry that require precision accuracy, the modes of small controlled movements of working parts are of greatest interest. When the same current pulses are fed into electric circuit of the described device, the rapid alterations of the pressure are well repeated. The correspondence is observed in a wide range of electric current amplitude and pressure values. The observed peculiarities of the pressure change were used for a regulated shift of the miniaturized holder. In the experiments, when the current in the conductor was altered, the air pressure in the pipe changed resulting in the motion of membrane and the holder that was fixed on it. Small shifts were monitored in microscope. For a convenience to watch the movements of the holder, a glass plate with a defect was placed beneath the holder. Upon a start of a current pulse, the pressure in the working pipe volume increased and by the action onto the elastic membrane caused the movement of the holder fixed on the membrane. When the pulse started, the holder rapidly reached a maximal value of the shift. After reaching the maximal value of the shift, the position of the holder remained almost unchangeable. After turning off the current pulse the holder went back to its original position. The controlled motion of the holder shown in the paper is in the range from less than 2 up to 200 microns. At lower values of pulse current amplitudes, the movement of the holder is less. The consistency of the results was determined solely by the parameters of the electric current pulse. The movements less than 1 micron became possible by applying small values of the current amplitudes. The experiment was carried out in which a plastic cylinder with the inner diameter c.a. 8 mm was attached to the tap of the glass pipe. The teflon piston was installed inside the cylinder, with the ability of free movement inside this cylinder. When a series of current pulses were supplied to the electric circuit from a signals generator, the piston made fast reciprocating motions, which could be easily watched visually. The results of the performed investigations suggest the possibility of widespread use of the effect of the fast pressure change of air environment near the conductor upon current alteration for solving scientific and technical problems. It is possible to create new devices, among others for nanotechnologies, which have great advantages in comparison with existing ones. One can obviously predict application for the creation of micro- and nano-instruments what has a great importance up to date. The simplicity of making such instruments lets us consider that the effect of one-to-one match of the pressure change to the electric current alterations in the working camera is prospective.

Usmanov N.N., Stolyarov D.L., Prudnikov I.R., Ivanov V.Y., Saletsky A.M. A practical use of experimentally observed changes in air pressure near conductor with electric current. Electromagnetic waves and electronic systems. 2021. V. 26. № 4. P. 36−41. DOI: https://doi.org/10.18127/j15604128-202104-04 (in Russian)

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