Transmission electron microscopy investigation of boron-doped polycrystalline chemically vapour-deposited diamond

Steeds, John W; Mora, A. E.; Butler, James E.; Bussmann, KM

doi:10.1080/01418610208235687

Cited by 7 publications

(5 citation statements)

References 11 publications

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“…11 The twinned plane reentrant groove growth model, which is the widely accepted explanation for the growth of these twinned platelets, was originally proposed by Hamilton and Seidensticker, and they proposed that the side-face of platelet was only bounded by {111} faces. 11,26 However, it is not certain if this growth mechanism can be applied to the case of diamond nanoplatelets as no apparent re-entrant grooves on the side face can be seen from the HRTEM image of Fig. Because the site has higher number of nearest neighbors than flat {111} plane, it is the most likely place for the adatom incorporation and acts as a self-perpetuating step source for lateral growth.…”

Section: Discussionmentioning

confidence: 99%

Structural investigation of diamond nanoplatelets grown by microwave plasma-enhanced chemical vapor deposition

Chen

Chang

2005

J. Mater. Res.

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We report a unique morphology of diamond nanoplatelets synthesized by microwave plasma chemical vapor deposition on Ni coated polycrystalline diamond substrates. The diamond nanoplatelets were as thin as approximately 30 nm. Electron microscopy showed that the diamond nanoplatelets appear in a shape consisting of trapezoid and parallelogram tabular crystallites. Furthermore, the diamond nanoplatelets were single crystalline, as shown by electron diffraction. The edges of nanoplatelets were along the 〈110〉 direction with both the top and bottom tabular surfaces parallel to the {111} plane. Transmission electron microscopy revealed that the twinned planes are parallel to the platelet and side-face structure in ridge shape is bounded by {100} and {111} planes. Lateral growth of diamond nanoplatelet is believed to result from twin and ridge face structure. An oriented thin graphite layer was observed on some diamond nanoplatelets.

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Section: Discussionmentioning

confidence: 99%

Structural investigation of diamond nanoplatelets grown by microwave plasma-enhanced chemical vapor deposition

Chen

Chang

2005

J. Mater. Res.

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“…When the texture is near a h110i or h112i axis of the crystallites, an accordion-like surface faceting is observed with re-entrant surfaces alternating between {111} and {100} (Shechtman 1994(Shechtman , 2006. In this situation, the next layer of growth on the {111} surface can nucleate at the re-entrant corner with a two-atom growth event and when this and the subsequent growth events at the step edge are faster than the nucleation of isolated four-atom island on the {111} surface, the result is the suppression of twin formation on the growing {111} facet and a high-quality growth sector underneath (Steeds et al 2002).…”

Section: The Modelmentioning

confidence: 99%

A mechanism for crystal twinning in the growth of diamond by chemical vapour deposition

Butler

Oleynik

2007

Phil. Trans. R. Soc. A.

107

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A model for the formation of crystal twins in chemical vapour deposited diamond materials is presented. The twinning mechanism originates from the formation of a hydrogen-terminated four carbon atom cluster on a local {111} surface morphology, which also serves as a nucleus to the next layer of growth. Subsequent growth proceeds by reaction at the step edges with one and two carbon atom-containing species. The model also provides an explanation for the high defect concentration observed in h111i growth sectors, the formation of penetration and contact twins, and the dramatic enhancement in polycrystalline diamond growth rates and morphology changes when small amounts of nitrogen are added to the plasma-assisted growth environments.

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“…As can be seen in Fig. 9, the reconstruction of the glide edge dislocation resembles, at least locally, that of a zig-zagged 6 In the case of the dissociation of the 60…”

Section: Just As the 60mentioning

confidence: 64%

“…Also CVDgrown polycrystalline diamond reveals high densities of dislocations -sometimes up to ¤ ¥ ¡ © ¡ . Some originate at the substrate-interface and propagate through the thin film [5], but others lie at or near grain boundaries [6]. The main slip system in diamond is of the ¤ ¤ ¤ !…”

Section: Introductionmentioning

confidence: 99%

Dislocation Structures in Diamond: Density-Functional Based Modelling and High-Resolution Electron Microscopy

Blumenau

Frauenheim

Öberg

et al. 2004

DDF

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The core structures of perfect 60 £ and edge dislocations in diamond are investigated atomistically in a density-functional based tight-binding approach, and their dissociation is discussed both in terms of structure and energy. Furthermore, high resolution electron microscopy is performed on dislocation cores in high-temperature, high-pressure annealed natural brown diamond, and HRTEM image simulation allows a comparison of theoretically predicted and experimentally observed structures.

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Transmission electron microscopy investigation of boron-doped polycrystalline chemically vapour-deposited diamond

Cited by 7 publications

References 11 publications

Structural investigation of diamond nanoplatelets grown by microwave plasma-enhanced chemical vapor deposition

Structural investigation of diamond nanoplatelets grown by microwave plasma-enhanced chemical vapor deposition

A mechanism for crystal twinning in the growth of diamond by chemical vapour deposition

Dislocation Structures in Diamond: Density-Functional Based Modelling and High-Resolution Electron Microscopy

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