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Size effects on surface chemistry and Raman spectra of sub-5 nm oxidized high-pressure high-temperature and detonation nanodiamonds

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    0542979 - FZÚ 2022 RIV US eng J - Journal Article
    Stehlík, Štěpán - Mermoux, M. - Schummer, B. - Vaněk, O. - Kolářová, Kateřina - Štenclová, Pavla - Vlk, Aleš - Ledinský, Martin - Pfeifer, Rene - Romanyuk, Olexandr - Gordeev, Ivan - Roussel-Dherbey, F. - Němečková, Zuzana - Henych, Jiří - Bezdička, Petr - Kromka, Alexander - Rezek, B.
    Size effects on surface chemistry and Raman spectra of sub-5 nm oxidized high-pressure high-temperature and detonation nanodiamonds.
    Journal of Physical Chemistry C. Roč. 125, č. 10 (2021), s. 5647-5669. ISSN 1932-7447. E-ISSN 1932-7455
    R&D Projects: GA ČR(CZ) GJ18-11711Y; GA MŠk(CZ) EF16_019/0000760; GA MŠk LM2018110
    Grant - others: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
    Institutional support: RVO:68378271 ; RVO:61388980
    Keywords : detonation nanodiamond * HPHT nanodiamond * particle size distribution * surface chemistry * Raman spectroscopy * phonon confinement * breathing modes
    OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Inorganic and nuclear chemistry (UACH-T)
    Impact factor: 4.177, year: 2021
    Method of publishing: Open access with time embargo

    Here we investigate the effect of size on the surface chemistry, microscopic structure, and Raman scattering of high-pressure high-temperature (HPHT) and detonation nanodiamonds (DNDs) down to 2-3 nm. The surface and size of NDs are controlled by annealing in air and ultracentrifugation resulting in three ND fractions. Particle size distribution (PSD) of the fractions is analyzed by combining dynamic light scattering (DLS), analytical ultracentrifugation (AUC), small angle X-ray scattering (SAXS), X-ray diffraction (XRD), and transmission electron microscopy (TEM) as complementary techniques. Based on the obtained PSD we identify size-dependent and synthesis-dependent differences of NDs properties. Interpretation of Raman scattering on NDs is revisited. Comprehensive comparison of detonation and pure monocrystalline HPHT NDs reveals effects of diamond core size and defects, chemical and temperature (in)stability as well as limitations of current phonon confinement models.
    Permanent Link: http://hdl.handle.net/11104/0320298

     
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