Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications

Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications

Electrophysical and optical properties of heterogeneous composite systems based on nanosilicon (nc–Si) and silica aerogel (SiOx) powders have been investigated using impedance spectroscopy and FTIR spectroscopy methods. In FTIR transmittance spectra the presence of vibration modes of hydroxyl groups...

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Veröffentlicht in:Functional Materials
Datum:2013
Hauptverfasser: Karlash, A.Yu., Kuznetsov, G.V., Milovanov, Yu.S., Skryshevsky, V.A.
Format: Artikel
Sprache:English
Veröffentlicht: НТК «Інститут монокристалів» НАН України 2013
Schlagworte:
Characterization and properties
Online Zugang:https://nasplib.isofts.kiev.ua/handle/123456789/119895
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Назва журналу:Digital Library of Periodicals of National Academy of Sciences of Ukraine
Zitieren:Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications / A.Yu. Karlash, G.V. Kuznetsov, Yu.S. Milovanov, V.A. Skryshevsky // Functional Materials. — 2013. — Т. 20, № 1. — С. 68-74. — Бібліогр.: 26 назв. — англ.

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Digital Library of Periodicals of National Academy of Sciences of Ukraine
id nasplib_isofts_kiev_ua-123456789-119895
record_format dspace
spelling Karlash, A.Yu.
Kuznetsov, G.V.
Milovanov, Yu.S.
Skryshevsky, V.A.
2017-06-10T10:20:23Z
2017-06-10T10:20:23Z
2013
Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications / A.Yu. Karlash, G.V. Kuznetsov, Yu.S. Milovanov, V.A. Skryshevsky // Functional Materials. — 2013. — Т. 20, № 1. — С. 68-74. — Бібліогр.: 26 назв. — англ.
1027-5495
DOI: dx.doi.org/10.15407/fm20.01.068
https://nasplib.isofts.kiev.ua/handle/123456789/119895
Electrophysical and optical properties of heterogeneous composite systems based on nanosilicon (nc–Si) and silica aerogel (SiOx) powders have been investigated using impedance spectroscopy and FTIR spectroscopy methods. In FTIR transmittance spectra the presence of vibration modes of hydroxyl groups covering the internal surface of SiOx matrix as well as associated Si–OH groups has been revealed that should determine the sensing behavior of considered composites mainly under water treating. Based on impedance measurements possible mechanisms of charge carrier transport have been proposed. It was shown that the main process in carrier transport of pressed SiOx/nc–Si composite structures is the percolation tunneling of charge carriers through the silicon nanoclusters system. The dynamic interaction of composite structures with water molecules and pure ethyl alcohol has been investigated. It was revealed that desorption kinetics of SiOx/nc–Si nanocomposites are characterized by higher desorption rate compared to SiOx samples. The relative change of resistance value under water treating ΔR/R ≅ 0.99 was almost similar for all investigated samples that confirmed the crucial role of oxide matrix in adsorption-desorption processes of considered composite structures. It was concluded that such sensing behavior could be utilized for construction the chemical sensors of humidity and alcohol based on porous SiOx and SiOx/nc–Si nanocomposites.
en
НТК «Інститут монокристалів» НАН України
Functional Materials
Characterization and properties
Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
Article
published earlier
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
title Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
spellingShingle Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
Karlash, A.Yu.
Kuznetsov, G.V.
Milovanov, Yu.S.
Skryshevsky, V.A.
Characterization and properties
title_short Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
title_full Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
title_fullStr Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
title_full_unstemmed Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
title_sort impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications
author Karlash, A.Yu.
Kuznetsov, G.V.
Milovanov, Yu.S.
Skryshevsky, V.A.
author_facet Karlash, A.Yu.
Kuznetsov, G.V.
Milovanov, Yu.S.
Skryshevsky, V.A.
topic Characterization and properties
topic_facet Characterization and properties
publishDate 2013
language English
container_title Functional Materials
publisher НТК «Інститут монокристалів» НАН України
format Article
description Electrophysical and optical properties of heterogeneous composite systems based on nanosilicon (nc–Si) and silica aerogel (SiOx) powders have been investigated using impedance spectroscopy and FTIR spectroscopy methods. In FTIR transmittance spectra the presence of vibration modes of hydroxyl groups covering the internal surface of SiOx matrix as well as associated Si–OH groups has been revealed that should determine the sensing behavior of considered composites mainly under water treating. Based on impedance measurements possible mechanisms of charge carrier transport have been proposed. It was shown that the main process in carrier transport of pressed SiOx/nc–Si composite structures is the percolation tunneling of charge carriers through the silicon nanoclusters system. The dynamic interaction of composite structures with water molecules and pure ethyl alcohol has been investigated. It was revealed that desorption kinetics of SiOx/nc–Si nanocomposites are characterized by higher desorption rate compared to SiOx samples. The relative change of resistance value under water treating ΔR/R ≅ 0.99 was almost similar for all investigated samples that confirmed the crucial role of oxide matrix in adsorption-desorption processes of considered composite structures. It was concluded that such sensing behavior could be utilized for construction the chemical sensors of humidity and alcohol based on porous SiOx and SiOx/nc–Si nanocomposites.
issn 1027-5495
url https://nasplib.isofts.kiev.ua/handle/123456789/119895
citation_txt Impedance spectroscopy of composites based on porous silicon and silica aerogel for sensor applications / A.Yu. Karlash, G.V. Kuznetsov, Yu.S. Milovanov, V.A. Skryshevsky // Functional Materials. — 2013. — Т. 20, № 1. — С. 68-74. — Бібліогр.: 26 назв. — англ.
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AT milovanovyus impedancespectroscopyofcompositesbasedonporoussiliconandsilicaaerogelforsensorapplications
AT skryshevskyva impedancespectroscopyofcompositesbasedonporoussiliconandsilicaaerogelforsensorapplications
first_indexed 2025-12-07T20:40:28Z
last_indexed 2025-12-07T20:40:28Z
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