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Statements

Subject Item
n2:RIV%2F68378271%3A_____%2F14%3A00427211%21RIV15-AV0-68378271
rdf:type
n10:Vysledek skos:Concept
dcterms:description
The carbonized silica (SiO2:C) nanopowders were prepared by chemical modification of fumed silica (aerosil) by phenyltrimethoxysilane followed by thermal annealing at temperature in range of 500-800 °C in nitrogen flow. Their magnetic properties were investigated by electron paramagnetic resonance (EPR) in the temperature range from 4.2 K to 292 K. The initial and annealed SiO2:C samples revealed carbon (C) related defects. The carbon related radicals (CRR) in annealed SiO2:C nanopowders with g-factors 2.0042, 2.0039 were attributed to the oxygen (O)- centered CRR and C-centered CRR with a nearby O heteroatom, respectively. The EPR data were compared with infrared (IR) and photoluminescence (PL) data. It was found that the position of the PL band depends on the type of CRR formed after sample annealing. The PL with maximum intensity at 440 nm was found for the sample annealed at 500°C in which O-centered CRR was observed while in the sample anneal.... The carbonized silica (SiO2:C) nanopowders were prepared by chemical modification of fumed silica (aerosil) by phenyltrimethoxysilane followed by thermal annealing at temperature in range of 500-800 °C in nitrogen flow. Their magnetic properties were investigated by electron paramagnetic resonance (EPR) in the temperature range from 4.2 K to 292 K. The initial and annealed SiO2:C samples revealed carbon (C) related defects. The carbon related radicals (CRR) in annealed SiO2:C nanopowders with g-factors 2.0042, 2.0039 were attributed to the oxygen (O)- centered CRR and C-centered CRR with a nearby O heteroatom, respectively. The EPR data were compared with infrared (IR) and photoluminescence (PL) data. It was found that the position of the PL band depends on the type of CRR formed after sample annealing. The PL with maximum intensity at 440 nm was found for the sample annealed at 500°C in which O-centered CRR was observed while in the sample anneal....
dcterms:title
Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds
skos:prefLabel
Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds Magnetic resonance and optical study of carbonized silica obtained bypyrolysis of surface compounds
skos:notation
RIV/68378271:_____/14:00427211!RIV15-AV0-68378271
n4:aktivita
n8:I n8:P
n4:aktivity
I, P(LM2011029)
n4:dodaniDat
n14:2015
n4:domaciTvurceVysledku
n9:2125587
n4:druhVysledku
n5:D
n4:duvernostUdaju
n18:S
n4:entitaPredkladatele
n13:predkladatel
n4:idSjednocenehoVysledku
26903
n4:idVysledku
RIV/68378271:_____/14:00427211
n4:jazykVysledku
n7:eng
n4:klicovaSlova
carbonized silica nanopowders; annealing; EPR; carbon radicals; PL; IR absorption
n4:klicoveSlovo
n6:IR%20absorption n6:carbon%20radicals n6:carbonized%20silica%20nanopowders n6:PL n6:annealing n6:EPR
n4:kontrolniKodProRIV
[5DCE7AF0FDFC]
n4:mistoKonaniAkce
Kyiv
n4:mistoVydani
Zurich
n4:nazevZdroje
Functional Nanomaterials and Devices VII
n4:obor
n15:BM
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
10
n4:projekt
n21:LM2011029
n4:rokUplatneniVysledku
n14:2014
n4:tvurceVysledku
Rudko, G. Vasin, A. V. Lysenko, V. S. Tertykh, V. Gontar, O. Sitnikov, A. Savchenko, Dariia Kalabukhova, E. Starik, S. Nazarov, A. N.
n4:typAkce
n17:EUR
n4:wos
000336634400013
n4:zahajeniAkce
2013-04-08+02:00
s:issn
1022-6680
s:numberOfPages
6
n12:doi
10.4028/www.scientific.net/AMR.854.99
n19:hasPublisher
Trans Tech Publications
n20:isbn
9783037859421