Inhomogeneous depletion of oxygen ions in metal oxide nanoparticles

Выходец, В. Б.; Jarvis, Emily; Куренных, Т. Е.; Бекетов, И. В.; Obukhov, S. I.; Саматов, О. М.; Medvedev, A. I.; Davletshin, A.E.; Whyte, Travis

doi:10.1016/j.susc.2015.10.011

Cited by 5 publications

(5 citation statements)

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“…In this relation, we suppose that the defects that are present in the YSZ10 nanoparticles and registered by the method of deuterium probes occur only due to the oxygen deficit in the nanoparticles, which can arise upon the synthesis of the powders. 14 On increasing the temperature of annealing in oxygen, the deuterium concentrations C D , C 1 and C 2 monotonously decreased and after annealing at 400 °C, they were an order of magnitude lower than that for the as-synthesized powders. These results were obviously conditioned by the decrease in the concentration of point defects after annealing in oxygen.…”

Section: Resultsmentioning

confidence: 93%

“…To determine the C D values from the products of the nuclear reactions, the spectra of the samples under study were compared with that of the reference with a constant-in-depth concentration of deuterium by the procedure described in ref. [13][14][15], the reference being ZrCr 2 D 0.12 . The mean-square error in the measurements of C D was $5%.…”

Section: Methodsmentioning

confidence: 99%

“…The content of yttrium oxide was made up 10 mol%; the chemical formula is Zr 0.82 Y 0.18 O 1.91. These powders were synthesized by the laser evaporation of ceramic target; the technology and powder characterization are described in ref. 14 .…”

Section: Methodsmentioning

confidence: 99%

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Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Выходец

Куренных

2020

RSC Adv.

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Section: Resultsmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

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Characterization of the defect structure of oxide nanoparticles with the use of deuterium probes

Выходец

Куренных

2020

RSC Adv.

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“…Именно эти ха-рактеристики в основном учитываются в стратегии применения нанопорошков. В то же вре-мя в последнее время появились данные, свидетельствующие о том, что концентрация кис-лорода в приповерхностной области кристаллической решетки оксидов ниже, чем в регуляр-ной решетке [1,2]. По результатам этих работ толщина дефицитного по кислороду слоя не-значительна, она сопоставима с размером атома.…”

Section: Introductionunclassified

“…Он основан на следующих соображениях. В наших работах [1,2] было показано, что при высокотемпературном синтезе нанопорошков с помощью технологии лазерного ис-парения керамической мишени формируются наночастицы с очень большим дефицитом кис-лорода в поверхностном атомном слое. При остывании и хранении нанопорошков происхо-дит взаимодействие наночастиц с окружающей атмосферой.…”

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Solubility of deuterium in alumina nanopowders

Выходец¹,

Куренных²

2016

DREAM

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The paper presents data on the effect of surface oxygen deficiency in nanoparticles on the catalytic properties of oxide nanopowders. Data on the interaction of nanopowders with gaseous hydrogen are the test modeling catalytic properties. Alumina nanopowders synthesized using laser evaporation of a ceramic target dissolve deuterium during their annealing in gaseous deuterium. It is only the surface atomic layer of nanoparticles with very large oxygen deficiency that has the ability to dissolve deuterium. Oxygen deficiency and deuterium solubility are adjustable properties of nanoparticles. They can be changed by annealing nanopowders in oxygen. Vykhodets V.B., Jarvis E., Kurennykh T.E., Beketov I.V., Obukhov S.I., Samatov O.M., Medvedev A.I., Davletshin A.E., Whyte T. Inhomogeneous depletion of oxygen ions in oxide nanoparticles. Surface Science, 2016, vol. 644, pp. 41-147. DOI: 10.1016/j.susc.2015. Jarvis E.A.A., Carter E.A. Metallic Character of the Al 2 O 3 (0001)-( 31 x 31 )R  9° Surface Reconstruction. J. Phys. Chem B, 2001, vol. 105, iss. 18, pp. 4045-4052. DOI: 10.1021/jp003587c. 4.French T.M., Somorjai Gabor A. Composition and surface structure of the (0001) face of -alumina by low-energy electron diffraction. J. Phys. Chem., 1970, vol. 74, no. 12, pp. 2489-2495.Sundaresan A., Bhargavi R., Rangarajan N., Siddesh U., Rao C. N. R. Ferromagnetism as a universal feature of nanoparticles of the otherwise nonmagnetic oxides. Phys. Rev. B, 2006, vol. 74, iss. 16, pp. 161306(R). DOI: 10.1103/PhysRevB.74.161306. 6. Sudakar C., Kharel P., Suryanarayanan R., Thakurc J.S., Naikd V.M., Naika R., Lawes G. Room temperature ferromagnetism in vacuum-annealed TiO 2 thin films. JMMM, 2008, vol. 320, iss. 5, pp. L31-L36. DOI: 10.1016/j.jmmm.2007 Hong N., Sakai J., Poirot N., Brisé V. Room-temperature ferromagnetism observed in undoped semiconducting and insulating oxide thin films. Phys. Rev. B, 2006, vol. 73, iss. 13, pp. 132404. DOI: 10.1103 Coey J.M.D. High-temperature ferromagnetism in dilute magnetic oxides.

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