Infrared Reflectance and Emissivity Spectra of Nanodiamonds

Maturilli, Alessandro; Shiryaev, A. A.; Кулакова, И. И.; Helbert, J.

doi:10.1080/00387010.2013.805420

Cited by 8 publications

(3 citation statements)

References 26 publications

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“…To reduce contribution of adsorbed water the samples were first vacuum-heated to 500 K and then gradually cooled. Though 500 K is insufficient for complete water desorption from 5 nm nanodiamonds 15,16 , our INS spectra show some contributions of the adsorbed hydrogen.…”

Section: Samples and Experimental Detailsmentioning

confidence: 82%

Inelastic neutron scattering: a novel approach towards determination of equilibrium isotopic fractionation factors. Size effects on heat capacity and beta-factor of diamond

Shiryaev

Polyakov

Rols

et al. 2020

Phys. Chem. Chem. Phys.

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Section: Samples and Experimental Detailsmentioning

confidence: 82%

Inelastic neutron scattering: a novel approach towards determination of equilibrium isotopic fractionation factors. Size effects on heat capacity and beta-factor of diamond

Shiryaev

Polyakov

Rols

et al. 2020

Phys. Chem. Chem. Phys.

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“…It is interesting to note a discrepancy between the sizes of tentatively observed nanodiamonds derived from radiative energy budget (1-10 nm; Van Kerckhoven et al 2002) and the fact that the required well-resolved IR bands are observed only when the nanodiamond grains become sufficiently large to possess crystal faces resembling those of macroscopic diamond. Investigation of diamond grains smaller than 30 nm shows that the corresponding IR features are blurred and shifted (Sheu et al 2002;Maturilli et al 2014). The discrepancy might be resolved if the hydrogen surface coverage is incomplete in contrast to the assumption in Van Kerckhoven et al (2002).…”

Section: Introductionmentioning

confidence: 98%

“…; Maturilli et al. ). The discrepancy might be resolved if the hydrogen surface coverage is incomplete in contrast to the assumption in Van Kerckhoven et al.…”

Section: Introductionmentioning

confidence: 98%

Photoluminescence of silicon‐vacancy defects in nanodiamonds of different chondrites

Shiryaev

Fisenko

Semjonova

et al. 2015

Meteorit & Planetary Scien

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Photoluminescence spectra show that silicon impurity is present in lattice of some nanodiamond grains (ND) of various chondrites as a silicon-vacancy (SiV) defect. The relative intensity of the SiV band in the diamond-rich separates depends on chemical composition of meteorites and on size of ND grains. The strongest signal is found for the size separates enriched in small grains; thus confirming our earlier conclusion that the SiV defects preferentially reside in the smallest (≤ 2 nm) grains. The difference in relative intensities of the SiV luminescence in the diamond-rich separates of individual meteorites are due to variable conditions of thermal metamorphism of their parent bodies and/or uneven sampling of nanodiamonds populations. Annealing of separates in air eliminates surface sp 2 -carbon, consequently, the SiV luminescence is enhanced. Strong and well-defined luminescence and absorption of the SiV defect is a promising feature to locate cold (< 250 °C) nanodiamonds in space.

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Microporosity and nanostructure of activated carbons: characterization by X-ray diffraction and scattering, Raman spectroscopy and transmission electron microscopy

Shiryaev¹,

Pré²,

Pardanaud³

et al. 2023

Adsorption

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Microporosity and structure of a set of activated carbons was studied by combination of N 2 and CO 2 adsorption, Transmission Electron Microscopy (TEM), X-ray diffraction and scattering and multiwavelength Raman spectroscopy. It is shown that correlations between measured parameteres may be established for a given set of activated carbons, most often obtained from a same precursor. Comparison of results of TEM images processing and of Small-angle scattering with adsorption data suggests that super-micropores (0.7-2 nm) are highly variable in shape and strongly deviate from the ideal slit pore model. These pores are likely located in between disordered continuous graphene stacks. It is shown that Small-angle scattering is mostly caused by supermicropores; contribution of other types of porosity is of secondary importance. For a set of carbons with similar structure, a reasonable correlation between Guinier radii and pore width obtained from N 2 adsorption can be found; however, the reason for the observed offset between the data sets remain uncertain. Sensitivity of the Raman scattering to atomic scale processes leads to poor or unclear correlations between the spectroscopic and structural data, although some notable exceptions are noted.

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Infrared Reflectance and Emissivity Spectra of Nanodiamonds

Cited by 8 publications

References 26 publications

Inelastic neutron scattering: a novel approach towards determination of equilibrium isotopic fractionation factors. Size effects on heat capacity and beta-factor of diamond

Inelastic neutron scattering: a novel approach towards determination of equilibrium isotopic fractionation factors. Size effects on heat capacity and beta-factor of diamond

Photoluminescence of silicon‐vacancy defects in nanodiamonds of different chondrites

Microporosity and nanostructure of activated carbons: characterization by X-ray diffraction and scattering, Raman spectroscopy and transmission electron microscopy

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