Defects in CVD diamond: Raman and XRD studies

Pandey, M.; D'Cunha, R.; Tyagi, A. K.

doi:10.1016/s0925-8388(01)01740-6

Cited by 42 publications

(21 citation statements)

References 19 publications

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“…2A shows the XRD patterns of all the synthesized Pt/Sn particles, deposited on a BDD substrate. The peaks ascribable to the typical Pt fcc structure are listed on Fig to the (4 0 0) plane of silicium (70°) [31], and to the (1 0 1), (2 0 0), (1 1 2), (2 1 1) (2 0 2) and (2 1 3) planes of Sn (located at 2h values of 33.1°, 56.5°, 61.8°, 66°, 66.5°and 86.7°, respectively) [32]. The (2 2 0) contribution of Sn is completely hidden by the (4 0 0) Si signal.…”

Section: Resultsmentioning

confidence: 99%

Boron-doped diamond (BDD)-supported Pt/Sn nanoparticles synthesized in microemulsion systems as electrocatalysts of ethanol oxidation

Siné

Fóti

Comninellis

2006

Journal of Electroanalytical Chemistry

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Section: Resultsmentioning

confidence: 99%

Boron-doped diamond (BDD)-supported Pt/Sn nanoparticles synthesized in microemulsion systems as electrocatalysts of ethanol oxidation

Siné

Fóti

Comninellis

2006

Journal of Electroanalytical Chemistry

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“…Further, due to the presence of biaxial stress, the diamond peak can split into two or three maxima, depending on the degeneracy of the phonon [57,58]. Factors like temperature, grain domain size, hydrostatic stress, have a strong influence on the peak shifting [59][60][61].…”

Section: Stressmentioning

confidence: 99%

Property mapping of polycrystalline diamond coatings over large area

et al. 2014

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Large-area polycrystalline diamond (PCD) coatings are important for fields such as thermal management, optical windows, tribological moving mechanical assemblies, harsh chemical environments, biological sensors, etc. Microwave plasma chemical vapor deposition (MPCVD) is a standard technique to grow high-quality PCD films over large area due to the absence of contact between the reactive species and the filament or the chamber wall. However, the existence of temperature gradients during growth may compromise the desired uniformity of the final diamond coatings. In the present work, a thick PCD coating was deposited on a 100-mm silicon substrate inside a 915-MHz reactor; the temperature gradient resulted in a non-uniform diamond coating. An attempt was made to relate the local temperature variation during deposition and the different properties of the final coating. It was found that there was large instability inside the system, in terms of substrate temperature (as high as ΔT = 212 ℃), that resulted in a large dispersion of the diamond coating's final properties: residual stress (15.8 GPa to +6.2 GPa), surface morphology (octahedral pyramids with (111) planes to cubo-octahedrals with (100) flat top surfaces), thickness (190 µm to 245 µm), columnar growth of diamond (with appearance of variety of nanostructures), nucleation side hardness (17 GPa to 48 GPa), quality (Raman peak FWHM varying from 5.1 cm 1 to 12.4 cm 1 with occasional splitting). This random variation in properties over large-area PCD coating may hamper reproducible diamond growth for any meaningful technological application.

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“…SA reveals a very strong (1 1 0) orientation, SB reveals a (1 0 0) texture with a small quantity of (1 1 0) facets, and SC reveals random orientation, which confirms the results of SEM. XRD also indicates that stress existed in diamond films [9,10]. Fig.…”

Section: Resultsmentioning

confidence: 99%