Detonation synthesized nanodiamond powder for the preparation of porous polycrystalline micron powders

Bogatyreva, G. P.; Voloshin, M. N.; Padalko, V.I.

doi:10.1016/j.diamond.2007.12.011

Cited by 22 publications

(8 citation statements)

References 3 publications

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“…The shoulder at 1250 cm −1 is still under discussion. It was observed for nanosized diamonds and can point to the presence of amorphous sp 3 carbon domains or to the phonon confinement effect .…”

Section: Resultsmentioning

confidence: 88%

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Kromka

Čech

Kozak

et al. 2015

Phys. Status Solidi B

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Due to an extraordinary combination of intrinsic properties of diamond nanoparticles (DNPs), there is an increased demand for their usage in various areas. While a broad range of surface termination is often done by wet‐chemical, UV‐irradiation or plasma treatments, DNPs hydrogenation is still an open issue. Thermal annealing or microwave plasma treatment, both known as high‐temperature processes, do not offer satisfactory solutions for DNPs hydrogenation. Here, we report on a new approach for plasma‐assisted DNPs hydrogenation at temperatures below 100 °C. As‐received detonation DNPs with size about 5 nm were annealed (oxidized) in air at 450 °C for 30 min to reduce non‐diamond carbon content. Then the annealed DNPs were plasma treated using atmospheric‐pressure diffuse coplanar surface barrier discharge in pure hydrogen at powers densities of 1.8 and 3.1 W/cm2. While infrared spectra of annealed DNPs were dominated by oxygen containing functional groups, plasma‐hydrogenated DNPs revealed increase of bands of CH stretching vibrations in the region of 2800–3000 cm−1 with only 5 min of plasma treatment. Prolonged plasma treatments up to 60 min resulted in the increase of CH stretching vibrations and a decrease of COC groups in the spectral region of 1000–1300 cm−1.

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Section: Resultsmentioning

confidence: 88%

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Kromka

Čech

Kozak

et al. 2015

Phys. Status Solidi B

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“…This layer, which has lower density than the grain itself, can be eliminated under conditions of gas pycnometry (during preliminary vacuumation) but not liquid pycnometry. In any case, the observed , typically 3.2-3.3 g cm À3 (Peng et al, 2001;Dolmatov, 2007;Bogatyreva et al, 2008;Batsanov et al, 2012), is well below b . It is thus obvious that nanoparticles consisting purely of diamond cannot be stable down to nm size.…”

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confidence: 88%

Diamond structure cannot be stable in nm-sized particles

Бацанов¹

2014

Acta Crystallogr Sect B

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The observed and calculated densities of nanodiamond cannot be reconciled, and the stability of diamond structure explained, if nanodiamond is regarded as a form of pure carbon. The surface-terminating hydrogen and functional groups are an integral part in the stability of these particles which therefore need not be as inert and non-toxic as bulk diamond, with important implications for nanomedicine.

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“…To determine the value of the thermal conductivity, the values of the density and heat capacity of the diamond powder and ferrofluid provided by the supplier [30][31][32][33][34] were used (see Table 1). …”

Section: Photothermal Setupmentioning

confidence: 99%

Thermal conductivity of a diamond magnetite composite fluid under the effect of a uniform magnetic field

Medina-Esquivel

Vales-Pinzon²,

Quiñones-Weiss

et al. 2015

Diamond and Related Materials

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Detonation synthesized nanodiamond powder for the preparation of porous polycrystalline micron powders

Cited by 22 publications

References 3 publications

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Low-Temperature hydrogenation of diamond nanoparticles using diffuse coplanar surface barrier discharge at atmospheric pressure

Diamond structure cannot be stable in nm-sized particles

Thermal conductivity of a diamond magnetite composite fluid under the effect of a uniform magnetic field

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