Thermal oxidation of CVD diamond

Zolotukhin, A. A.; Kopylov, P. G.; Исмагилов, Р. Р.

doi:10.1016/j.diamond.2010.03.005

Cited by 45 publications

(17 citation statements)

References 9 publications

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“…Based on the above observations, the addition of N 2 played a critical role for structural changes of diamond nanowires. The diamond nanowire heterostructures with sp 3 -bonded phase and sp 2 -bonded graphite obtained in our study were in good agreement with other studies [21,22]. Figure 5 shows the contact angles and sp 2 /sp 3 ratio of NCD films as a function of N 2 content, revealing that the wettability of diamond nanowires was sensitive to the bonding structures.…”

Section: Resultssupporting

confidence: 91%

The effect of nitrogen addition to Ar/CH4 gas mixture on microstructural characterization of nanocrystalline diamond

Lee¹,

Lin³

et al. 2014

Journal of Polymer Engineering

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In the present study, nanocrystalline diamond (NCD) nanowire films were synthesized on silicon substrates, using microwave plasma-enhanced chemical vapor deposition (PECVD) with a CH 4 /Ar/N 2 gas mixture at moderate temperatures. The influence of nitrogen concentration on the formation of NCD was investigated. The characteristics of NCD films were evaluated using scanning electron microscopy (SEM), Raman spectroscopy, optical emission spectroscopy (OES), and a contact angle meter. NCD nanowire films with 300-500 nm length were grown with the incorporation of nitrogen. Heterostructures of sp 3 -bonded diamond nanowires and sp 2 -bonded graphite were synthesized by adding small amounts of nitrogen to the CH 4 /Ar gas mixture. Surface roughness became smooth and the grain size decreased as the nitrogen was introduced into the CH 4 /Ar gas mixture. With the increase of nitrogen concentration, the sp 2 /sp 3 ratio of carbon bonds increased. The wettability of the NCD nanowire films was sensitive to the bonding structure. The hydrophobic and non-reactive properties of NCD nanowire films make them highly applicable for biomedical implants.

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Section: Resultssupporting

confidence: 91%

The effect of nitrogen addition to Ar/CH4 gas mixture on microstructural characterization of nanocrystalline diamond

Lee¹,

Lin³

et al. 2014

Journal of Polymer Engineering

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“…More information on the sample synthesis is presented in Ref. 22. A large number of needles was scattered on a silicon substrate, individual needles were selected and glued on an electro-polished tungsten tip by micromanipulation under an optical microscope.…”

mentioning

confidence: 99%

Strain sensitivity and symmetry of 2.65 eV color center in diamond nanoscale needles

Venturi

Rigutti

Houard

et al. 2019

Applied Physics Letters

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“…25 Despite on extensive and numerous reports available on preparation of NDs and their applications in different fields, a comprehensive understanding on the fundamental properties, formation of color centers, and influence of point defects on florescence in NDs necessitate further investigations. Herein, there are several reports exist on the oxidation behavior of diamond films with nano-or micro-crystallites, and DNDs, 26,27,28,29 but we could find hardly any on thermal oxidation to produce discrete NDs with uniform particle distribution having high structural quality with < 1.5 cm -1 full width at half maximum (FWHM) of Raman band.…”

Section: Introductionmentioning

confidence: 95%

Si and N - Vacancy color centers in discrete diamond nanoparticles: Raman and fluorescence spectroscopic studies

Ganesan

Ajikumar

Ilango

et al. 2019

Diamond and Related Materials

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The present study reports on an innovative method to prepare discrete diamond nanoparticles or nanodiamonds (NDs) with high structural and optical quality through top-down approach by controlled oxidation of pre-synthesized nanocrystalline diamond (NCD) film. These NDs are studied for their structural and optical properties using atomic force microscopy (AFM), Raman and fluorescence (FL) spectroscopy. While AFM analysis confirms uniform distribution of discrete NDs with different sizes varying from a few tens of nanometers to about a micron, spectroscopic investigations reveal the presence of impurity -vacancy related color centers exhibiting FL at 637 and 738 nm as a function of particle size. In addition, an intense emission originating from vacancy centers associated with N and Si (SiVˉ) is observed for all NDs at the temperature close to liquid nitrogen. A detailed spectral analysis is carried out on the structural defects in these NDs. The full width at half maximum of diamond Raman band ( ~ 1332 cm -1 ) is found to be as narrow as 1.5 cm -1 which reveals the superior structural quality of these NDs.Further, mapping of diamond Raman and FL spectra of SiVˉ confirm the uniform distribution of NDs throughout the substrate. The narrow line widths and a minimal shift in peak positions of Raman and FL spectra endorse this aspect.

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Thermal oxidation of CVD diamond

Cited by 45 publications

References 9 publications

The effect of nitrogen addition to Ar/CH4 gas mixture on microstructural characterization of nanocrystalline diamond

The effect of nitrogen addition to Ar/CH4 gas mixture on microstructural characterization of nanocrystalline diamond

Strain sensitivity and symmetry of 2.65 eV color center in diamond nanoscale needles

Si and N - Vacancy color centers in discrete diamond nanoparticles: Raman and fluorescence spectroscopic studies

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