Luminescence Intensity ELF Oscillations from a Polymer Membrane in the Aqueous Salt Solutions

Abstract

The paper studies luminescence from the Nafion polymer membrane surface at its swelling in the isotonic aqueous solutions and bi-distilled water using the experimental photo luminescent spectroscopy. Liquid samples were preliminarily treated with the electric pulses with duration of 1 µs and amplitude of 0.1 V using antenna in the form of a flat capacitor. Experiments in photo luminescent spectroscopy were carried out 20 min after the electric pulse treatment. Typical luminescence intensity dependence on the membrane swelling time could be represented as the exponentially decreasing function. Characteristic decay time of the corresponding functions and stationary level of the membrane luminescence intensity depend on the electrical pulses repetition rate. The obtained dependencies could well be reproduced. However, dependence of the luminescence intensity at certain pulse repetition rates appears to be a random function, and the reproducibility is missing. It could be assumed that these stochastic effects are associated with exposure to random external force of the electromagnetic nature acting on the polymer membrane during swelling. Low-frequency pulsations of neutron stars or white dwarfs are the source of this random force according to the authors of the work. This effect is associated with depolarization during the low-frequency electromagnetic field scattering caused by the neutron stars pulsation. Depolarization effect arises due to scattering on long-living anisotropic clusters of nano-bubbles, which, in turn, are becoming anisotropic in the external field of a flat capacitor. Depolarized scattered radiation causes stochastic oscillations of the polymer fibers unwound into the bulk liquid. In this case, luminescence should also acquire the stochastic character taking into account the effect of resonant luminescence energy transfer from a donor to the luminescence acceptor

This work was supported by a grant from the Ministry of Science and Higher Education of the Russian Federation (no. 075-15-2022-315) for the organization and development of a world-class Research Center "Photonics"

Please cite this article in English as:

Bunkin N.F., Bashkin S.V., Bolotskova P.N., et al. Luminescence intensity ELF oscillations from a polymer membrane in the aqueous salt solutions. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2023, no. 2 (107), pp. 50--82 (in Russ.). DOI: https://doi.org/10.18698/1812-3368-2023-2-50-82

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