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Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves

The temporal dynamics of luminescence from the surface of Nafion polymer membranes have been studied. In fact, the polymer membrane was soaked in liquids with different contents of deuterium. The test liquids were ordinary (natural) water (deuterium content equal to 157 ppm) and deuterium-depleted w...

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Autores principales: Bunkin, Nikolai F., Astashev, Maxim E., Bolotskova, Polina N., Kozlov, Valeriy A., Kravchenko, Artem O., Nagaev, Egor I., Okuneva, Maria A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269195/
https://www.ncbi.nlm.nih.gov/pubmed/35808587
http://dx.doi.org/10.3390/polym14132542
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author Bunkin, Nikolai F.
Astashev, Maxim E.
Bolotskova, Polina N.
Kozlov, Valeriy A.
Kravchenko, Artem O.
Nagaev, Egor I.
Okuneva, Maria A.
author_facet Bunkin, Nikolai F.
Astashev, Maxim E.
Bolotskova, Polina N.
Kozlov, Valeriy A.
Kravchenko, Artem O.
Nagaev, Egor I.
Okuneva, Maria A.
author_sort Bunkin, Nikolai F.
collection PubMed
description The temporal dynamics of luminescence from the surface of Nafion polymer membranes have been studied. In fact, the polymer membrane was soaked in liquids with different contents of deuterium. The test liquids were ordinary (natural) water (deuterium content equal to 157 ppm) and deuterium-depleted water (deuterium content is equal to 3 ppm). Simultaneously with the excitation of luminescence, the Nafion plate was irradiated with ultrasonic pulses, having a duration of 1 μs. The ultrasonic waves were generated with different repetition rates and amplitudes, and irradiated the surface of Nafion in the geometry of grazing or normal incidence. Luminescence regimes were studied when the membrane was irradiated with one ultrasonic wave (one piezoelectric transducer) or two counter-propagating waves (two piezoelectric transducers). It turned out that ultrasonic waves, which fall normal to the membrane interface, do not affect the dynamics of luminescence. At the same time, in the case of ultrasonic irradiation in the grazing incidence geometry, sharp jumps in the luminescence intensity occur, and the behavior of these jumps substantially depends on the mode of irradiation: one or two piezoelectric transducers. This allows for control of the dynamics of luminescence from the polymer surface. In accordance with this model, the possibility of altering the luminescence dynamics is due to the effect of unwinding the polymer fibers from the surface toward the liquid bulk upon soaking. It is important that such unwinding does not occur in deuterium-depleted water, which was confirmed in a direct experiment with dynamic light scattering from polydisperse aqueous suspensions of Nafion nanometer-sized particles; these suspensions were prepared in ordinary water and deuterium-depleted water. Thus, ultrasonic irradiation affects the dynamics of luminescence only when Nafion is swollen in ordinary water; in the case of deuterium-depleted water this effect is missed.
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spelling pubmed-92691952022-07-09 Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves Bunkin, Nikolai F. Astashev, Maxim E. Bolotskova, Polina N. Kozlov, Valeriy A. Kravchenko, Artem O. Nagaev, Egor I. Okuneva, Maria A. Polymers (Basel) Article The temporal dynamics of luminescence from the surface of Nafion polymer membranes have been studied. In fact, the polymer membrane was soaked in liquids with different contents of deuterium. The test liquids were ordinary (natural) water (deuterium content equal to 157 ppm) and deuterium-depleted water (deuterium content is equal to 3 ppm). Simultaneously with the excitation of luminescence, the Nafion plate was irradiated with ultrasonic pulses, having a duration of 1 μs. The ultrasonic waves were generated with different repetition rates and amplitudes, and irradiated the surface of Nafion in the geometry of grazing or normal incidence. Luminescence regimes were studied when the membrane was irradiated with one ultrasonic wave (one piezoelectric transducer) or two counter-propagating waves (two piezoelectric transducers). It turned out that ultrasonic waves, which fall normal to the membrane interface, do not affect the dynamics of luminescence. At the same time, in the case of ultrasonic irradiation in the grazing incidence geometry, sharp jumps in the luminescence intensity occur, and the behavior of these jumps substantially depends on the mode of irradiation: one or two piezoelectric transducers. This allows for control of the dynamics of luminescence from the polymer surface. In accordance with this model, the possibility of altering the luminescence dynamics is due to the effect of unwinding the polymer fibers from the surface toward the liquid bulk upon soaking. It is important that such unwinding does not occur in deuterium-depleted water, which was confirmed in a direct experiment with dynamic light scattering from polydisperse aqueous suspensions of Nafion nanometer-sized particles; these suspensions were prepared in ordinary water and deuterium-depleted water. Thus, ultrasonic irradiation affects the dynamics of luminescence only when Nafion is swollen in ordinary water; in the case of deuterium-depleted water this effect is missed. MDPI 2022-06-22 /pmc/articles/PMC9269195/ /pubmed/35808587 http://dx.doi.org/10.3390/polym14132542 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bunkin, Nikolai F.
Astashev, Maxim E.
Bolotskova, Polina N.
Kozlov, Valeriy A.
Kravchenko, Artem O.
Nagaev, Egor I.
Okuneva, Maria A.
Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves
title Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves
title_full Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves
title_fullStr Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves
title_full_unstemmed Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves
title_short Possibility to Alter Dynamics of Luminescence from Surface of Polymer Membrane with Ultrasonic Waves
title_sort possibility to alter dynamics of luminescence from surface of polymer membrane with ultrasonic waves
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269195/
https://www.ncbi.nlm.nih.gov/pubmed/35808587
http://dx.doi.org/10.3390/polym14132542
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