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Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties

Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties

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In a magnetic colloid- a magnetic fluid (MF), which is placed in an electrochemical cell (a flat capacitor), a thin near-surface layer is formed in the electric field. This layer is an active medium in which the process of self-organization – autowaves was observed and studied. The layer consists of...

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Príomhchruthaitheoirí: Chekanov, V. V., Чеканов, В. В.
Formáid: Статья
Teanga:English
Foilsithe / Cruthaithe: Academy of Sciences of the Czech Republic 2018
Ábhair:
Autowaves
Magnetic fluid
Near-electrode nano-layer
Polarization capacitance
Rochtain ar líne:https://www.scopus.com/record/display.uri?eid=2-s2.0-85052204403&origin=resultslist&sort=plf-f&src=s&nlo=1&nlr=20&nls=afprfnm-t&affilName=north+caucasus+federal+university&sid=8d08f4eea3de9a3249795f964e3c5cff&sot=afnl&sdt=sisr&sl=53&s=%28AF-ID%28%22North+Caucasus+Federal+University%22+60070541%29%29&ref=%28Effect+of+a+near-surface+nanolayer+formation+on+the+magnetic+fluid+electrical+properties%29&relpos=0&citeCnt=0&searchTerm=
https://dspace.ncfu.ru/handle/20.500.12258/2932
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spelling oai:10.200.131.19:20.500.12258-29322018-09-11T09:34:53Z Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties Chekanov, V. V. Чеканов, В. В. Autowaves Magnetic fluid Near-electrode nano-layer Polarization capacitance In a magnetic colloid- a magnetic fluid (MF), which is placed in an electrochemical cell (a flat capacitor), a thin near-surface layer is formed in the electric field. This layer is an active medium in which the process of self-organization – autowaves was observed and studied. The layer consists of magnetite particles with a protective coating—oleic acid (HOl). We found a several orders increase of capacitance and a few times increase in the resistance of an electrochemical cell filled with a magnetic fluid by sending a pulsed electric field to the electrodes. Electrodes in the cell are thin transparent conductive ITO (InSnO2) membranes deposited on the glass. The cell reflectivity (reflectance) changes due to the formation of the near-electrode layers of magnetic fluid nanoparticles in the electric field. It can be registered by the interference of the falling light in these layers. The thickness of the near-electrode layer is estimated from the change in the reflectivity of monochromatic light. With increasing voltage on the electrodes, the layer becomes unstable, it periodically arises and collapses. As a result, the intensity of the reflected light fluctuates. When illuminated with white light, brightly colored waves are visible on the surface of the cell 2018-09-11T09:34:01Z 2018-09-11T09:34:01Z 2018 Статья Kandaurova, N.V., Chekanov, V.V., Chekanov, V.S. Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties // Acta Technica CSAV (Ceskoslovensk Akademie Ved). - 2018. - Volume 63. - Issue 4. - Pages 555-562 https://www.scopus.com/record/display.uri?eid=2-s2.0-85052204403&origin=resultslist&sort=plf-f&src=s&nlo=1&nlr=20&nls=afprfnm-t&affilName=north+caucasus+federal+university&sid=8d08f4eea3de9a3249795f964e3c5cff&sot=afnl&sdt=sisr&sl=53&s=%28AF-ID%28%22North+Caucasus+Federal+University%22+60070541%29%29&ref=%28Effect+of+a+near-surface+nanolayer+formation+on+the+magnetic+fluid+electrical+properties%29&relpos=0&citeCnt=0&searchTerm= http://hdl.handle.net/20.500.12258/2932 en Acta Technica CSAV (Ceskoslovensk Akademie Ved) application/pdf Academy of Sciences of the Czech Republic
institution СКФУ
collection Репозиторий
language English
topic Autowaves
Magnetic fluid
Near-electrode nano-layer
Polarization capacitance
spellingShingle Autowaves
Magnetic fluid
Near-electrode nano-layer
Polarization capacitance
Chekanov, V. V.
Чеканов, В. В.
Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
description In a magnetic colloid- a magnetic fluid (MF), which is placed in an electrochemical cell (a flat capacitor), a thin near-surface layer is formed in the electric field. This layer is an active medium in which the process of self-organization – autowaves was observed and studied. The layer consists of magnetite particles with a protective coating—oleic acid (HOl). We found a several orders increase of capacitance and a few times increase in the resistance of an electrochemical cell filled with a magnetic fluid by sending a pulsed electric field to the electrodes. Electrodes in the cell are thin transparent conductive ITO (InSnO2) membranes deposited on the glass. The cell reflectivity (reflectance) changes due to the formation of the near-electrode layers of magnetic fluid nanoparticles in the electric field. It can be registered by the interference of the falling light in these layers. The thickness of the near-electrode layer is estimated from the change in the reflectivity of monochromatic light. With increasing voltage on the electrodes, the layer becomes unstable, it periodically arises and collapses. As a result, the intensity of the reflected light fluctuates. When illuminated with white light, brightly colored waves are visible on the surface of the cell
format Статья
author Chekanov, V. V.
Чеканов, В. В.
author_facet Chekanov, V. V.
Чеканов, В. В.
author_sort Chekanov, V. V.
title Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
title_short Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
title_full Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
title_fullStr Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
title_full_unstemmed Effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
title_sort effect of a near-surface nanolayer formation on the magnetic fluid electrical properties
publisher Academy of Sciences of the Czech Republic
publishDate 2018
url https://www.scopus.com/record/display.uri?eid=2-s2.0-85052204403&origin=resultslist&sort=plf-f&src=s&nlo=1&nlr=20&nls=afprfnm-t&affilName=north+caucasus+federal+university&sid=8d08f4eea3de9a3249795f964e3c5cff&sot=afnl&sdt=sisr&sl=53&s=%28AF-ID%28%22North+Caucasus+Federal+University%22+60070541%29%29&ref=%28Effect+of+a+near-surface+nanolayer+formation+on+the+magnetic+fluid+electrical+properties%29&relpos=0&citeCnt=0&searchTerm=
https://dspace.ncfu.ru/handle/20.500.12258/2932
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