Structural and sensing properties of a novel Fe/Fe2O3/polyoxocarbosilane core shell nanocomposite powder prepared by laser pyrolysis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F07%3A00081224" target="_blank" >RIV/67985858:_____/07:00081224 - isvavai.cz</a>

Alternative codes found

RIV/61388955:_____/07:00081224

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Structural and sensing properties of a novel Fe/Fe2O3/polyoxocarbosilane core shell nanocomposite powder prepared by laser pyrolysis

Original language description

This paper reports about the synthesis and characterization of a novel Fe/Fe2O3/polyoxocarbosilane core shell nanocomposite as a material for gas-sensing applications. The nanocomposites (Fe-based nano cores enveloped with polymeric polyoxocarbosilane shells) were prepared by the IR laser co-pyrolysis of iron pentacarbonyl and hexamethyldisiloxane. The iron-based cores become superficially oxidized in atmosphere. The morphologies, chemical content and thermal behavior were studied by different analytical techniques. The sensing properties of the polymer-poor nanocomposite thick films were tested by measuring the variation of the electrical resistance in presence of CO and CH4, at a working temperature of 450 degrees C. Preliminary results indicate thatfor CO toxic gas, an n-p transitional character of the semiconducting iron oxide appears in humid relatively to dry air.

Czech name

Strukturní a senzorické vlastnosti Fe/Fe2O3/polyoxocarbosilan "core-shell" nanokompositního prášku připraveného laserovou pyrolýzou

Czech description

V publikaci jsou popsány syntéza a charakterizace nanočástic Fe/Fe2O3/polyoxocarbosilane nového typu se strukturou "core-shell" jejichž jádro je tvořeno Fe a enkapsulovaného polykarbosilanem. Nanokompozit byl připraven homogenní kopyrolýzou IR laserem pentakarbonylu železa a hexamethyldisiloxanu. Expozice na vzduchu vede k povrchové oxidaci Fe. Senzorické vlastnosti nanokompozitu byly studovány měřením elektrického odporu v přítomnosti oxidu uhelnatého a metánu.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

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Project

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Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)<br>V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2007

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Science

ISSN

0022-2461

e-ISSN

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Volume of the periodical

42

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

1838-1846

UT code for WoS article

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EID of the result in the Scopus database

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