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Physical and chemical properties of modified nanodiamonds [Text] / A. P. Puzyr [et al.] ; ed.: DM Gruen, OA Shenderova, erova, OA She // Synthesis, Properties and Applications of Ultrananocrystalline Diamond. Ser. NATO SCIENCE SERIES, SERIES II: MATHEMATICS, PHYSICS AND CHEMISTRY : SPRINGER, 2005. - Vol. 192: NATO Advanced Research Workshop on Synthesis, Properties and Applications of Ultrananocrystalline Diamond (JUN 07-10, 2004, St Petersburg, RUSSIA). - P261-270. - Cited References: 15 . - ISBN 1-4020-3320-6

РУБ Chemistry, Physical + Materials Science, Multidisciplinary

Кл.слова (ненормированные):
nanodiamond -- modified nanodiamonds -- hydrosols -- colloidal stability -- electrophoresis -- powder fractioning -- precursors for CVD -- electron field emission
Аннотация: A unique technology of nanodiamond surface modification is suggested which allows to separation of commercial nanodiamond powders into two fractions (F1 and 172), each possessing absolutely new properties as compared to the initial powder. F1 and F2 differ in size characteristics. Initial and modified nanodiamonds contain iron impurities and two types of nondiamond carbon. The color of the powders and hydrosols does not correlate with the content of non-diamond carbon. According to the EPR data, modified nanodiamonds possess a high level of diamond matrix shielding, and the extracted fractions differ in width of the basic transition area and in the SHF energy adsorption ratio. Due to this, F1 can be applied as precursors for CVD growth of nanocrystalline diamond and as field electron emission tips.

Держатели документа:
RAS, Inst Biophys SB, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Puzyr, A.P.; Bondar, V.S.; Bukayemsky, A.A.; Selyutin, G.E.; Kargin, V.F.; Gruen, DM \ed.\; Shenderova, OA \ed.\; She, erova, OA \ed.\

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Thermal properties of diamond/carbon composites [Text] / A. . Vlasov [et al.] // Diam. Relat. Mat. - 2000. - Vol. 9: 10th European Conference on Diamond, Diamond-Like Materials, Nitrides and Silicon Carbide (Diamond 1999) (SEP 12-17, 1999, PRAGUE, CZECH REPUBLIC), Is. 03.06.2013. - P. 1104-1109, DOI 10.1016/S0925-9635(99)00256-3. - Cited References: 9 . - ISSN 0925-9635

РУБ Materials Science, Multidisciplinary
Рубрики:
CVD DIAMOND
   CONDUCTIVITY
   FILMS
   RAMAN
Кл.слова (ненормированные):
diamond composites -- laser flash technique -- TEM -- thermal conductivity
Аннотация: The thermal conductivity, k, of diamond/carbon composites with different ratios of sp(2)/sp(3)-bonded carbon is measured by the laser flash technique. The thermal conductivity of nanocomposites containing 6 nm diamond particles falls within the range of k = 0.003-0.017 W/cmK; at room temperature. The thermal conductivity increases while nanopores are gradually filled with pyrolytic carbon (pyrocarbon/diamond mass ratio variation of 0.0-0.5). Transmission electron microscopy data reveal a fairly uniform mixture of two carbon phases, the diamond and matrix having similar grain sizes. Estimates show that the phonon free path is limited by dimensions of carbon matrix layer. Thermal data for coarse-grain (1-2 mu m) composites are also given for comparison. (C) 2000 Elsevier Science S.A. All rights reserved.

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Держатели документа:
Inst Gen Phys, Moscow 117942, Russia
CRIM, St Petersburg, Russia
Inst Crystallog, Moscow, Russia
Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Vlasov, A...; Ralchenko, V...; Gordeev, S...; Zakharov, D...; Vlasov, I...; Karabutov, A...; Belobrov, P...

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Low-field electron emission of diamond/pyrocarbon composites [Text] / A. V. Karabutov [et al.] // J. Vac. Sci. Technol. B. - 2001. - Vol. 19: 13th International Vacuum Microlectronics Conference (AUG 13-17, 2000, GUANGZHOU, PEOPLES R CHINA), Is. 3. - P. 965-970, DOI 10.1116/1.1368669. - Cited References: 31 . - ISSN 1071-1023

РУБ Engineering, Electrical & Electronic + Nanoscience & Nanotechnology + Physics, Applied
Рубрики:
CVD DIAMOND FILMS
   SCANNING-TUNNELING-MICROSCOPY
   AMORPHOUS-CARBON
   COLD-CATHODE
Аннотация: Properties of the field electron emission for diamond/pyrocarbon nanocomposites produced from diamond particles surrounded by an sp(2)-bonded pyrocarbon matrix are considered as functions of a size of diamond particles selected in the range of 5 nm - 5 mum, and of an average thickness of the pyrocarbon shell controlled by the pyrocarbon/diamond mass ratio varied from 0 to 0.5. The low-threshold emission at fields of greater than or equal to1 V/mum with ''no activation/no hysteresis'' I-V behavior was observed for these materials using tungsten tip microprobes as well as a fluorescent screen. A specially designed scanning tunneling-field emission microscope was used for simultaneous mapping of field emission intensity, topography, work function, and electrical resistivity to study the mechanisms of the emission from the composites and well-emitting chemical vapor deposition diamond films. It was found that for both of the materials emission centers are associated with interfaces between diamond and sp2-bonded carbon phases. Possible mechanisms of the low-field electron emission for the diamond/graphite composites including local field enhancement are analyzed. A model of the low-field emission based on quantum well effect at the diamond/graphite interface is proposed and discussed. (C) 2001 American Vacuum Society.

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Держатели документа:
Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia
Cent Res Inst Mat, St Petersburg, Russia
Russian Acad Sci, Inst Biophys, Krasnoyarsk 660036, Russia
ИБФ СО РАН : 660036, Красноярск, Академгородок, д. 50, стр. 50

Доп.точки доступа:
Karabutov, A.V.; Frolov, V.D.; Konov, V.I.; Ralchenko, V.G.; Gordeev, S.K.; Belobrov, P.I.

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Detonation Nanodiamond-Assisted Carbon Nanotube Growth by Hot Filament Chemical Vapor Deposition / I. P. Kudarenko [et al.] // Phys. Status Solidi B-Basic Solid State Phys. - 2018. - Vol. 255, Is. 1. - Ст. 1700286, DOI 10.1002/pssb.201700286. - Cited References:28. - The work was supported by RSF project 17-72-10173. . - ISSN 0370-1972. - ISSN 1521-3951

РУБ Physics, Condensed Matter
Рубрики:
DIAMOND
   FILMS
   HFCVD
   FABRICATION
   GRAPHITE
   SCIENCE
   SIZE
   CVD
Кл.слова (ненормированные):
carbon nanotubes -- catalytic growth -- diamond -- hot filament chemical vapor -- deposition -- nanomaterials -- synthesis
Аннотация: Substrates pretreatment in suspensions of a detonation nanodiamond is widely used for nucleation of diamond growth by chemical vapor deposition (CVD). We found that iron inclusions in the nanodiamond provide catalytical growth of carbon nanotubes during CVD in a hot filament reactor (HF CVD). Carbon nanotubes grow in the area between two adjacent Si wafers. The diameters of such obtained nanotubes were in the range of 10-100 nm and the length of the tubes reaches about 10 mu m. The proposed HF CVD method has convincing potential for the fabrication of carbon nanotube coatings on a large surface area.

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Держатели документа:
Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia.
Univ Eastern Finland, Dept Phys & Math, Joensuu 80101, Finland.
RAS, Fed Sci Res Ctr Crystallog & Photon, AV Shubnikov Inst Crystallog, Moscow 119333, Russia.
Natl Res Ctr, Kurchatov Inst, Moscow 123182, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr SB RAS, Fed Res Ctr, Inst Biophys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kudarenko, Ilya P.; Malykhin, Sergei A.; Orekhov, Andrey S.; Puzyr, Aleksey P.; Kleshch, Victor I.; Ismagilov, Rinat R.; Obraztsov, Alexander N.; RSF [17-72-10173]

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Single-Crystal Diamond Needle Fabrication Using Hot-Filament Chemical Vapor Deposition / R. Ismagilov, S. Malykhin, A. Puzyr [et al.] // Materials. - 2021. - Vol. 14, Is. 9. - Ст. 2320, DOI 10.3390/ma14092320. - Cited References:32. - This work was supported by the Russian Science Foundation (project no. 19-79-00203) and by the Russian Foundation for Basic Research (grant no. 18-29-19071, in part for PL and Raman inspection). . - ISSN 1996-1944

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy &

Кл.слова (ненормированные):
thin films -- diamond needles -- chemical vapor deposition -- hot-filament -- CVD -- large-scale synthesis
Аннотация: Single-crystal diamonds in the form of micrometer-scale pyramids were produced using a combination of hot-filament (HF) chemical vapor deposition (CVD) and thermal oxidation processes. The diamond pyramids were compared here with similar ones that were manufactured using plasma-enhanced (PE) CVD. The similarities revealed in the morphology, Raman, and photoluminescent characteristics of the needles obtained using the hot-filament and plasma-enhanced CVD are discussed in connection with the diamond film growth mechanism. This work demonstrated that the HF CVD method has convincing potential for the fabrication of single-crystal diamond needles in the form of regularly shaped pyramids on a large surface area, even on non-conducting substrates. The experimental results demonstrated the ability for the mass production of the single-crystal needle-like diamonds, which is important for their practical application.

WOS
Держатели документа:
Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia.
Univ Eastern Finland, Dept Phys & Math, Joensuu 80101, Finland.
Russian Acad Sci, Lebedev Phys Inst, Div Solid State Phys, Moscow 119991, Russia.
Russian Acad Sci, RAS, Inst Biophys, Fed Res Ctr,Krasnoyarsk Sci Ctr SB, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Ismagilov, Rinat; Malykhin, Sergei; Puzyr, Aleksey; Loginov, Artem; Kleshch, Victor; Obraztsov, Alexander; Russian Science FoundationRussian Science Foundation (RSF) [19-79-00203]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-29-19071]

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