A mechanism for crystal twinning in the growth of diamond by chemical vapour deposition - PubMed (original) (raw)

. 2008 Jan 28;366(1863):295-311; discussion 311.

doi: 10.1098/rsta.2007.2152.

Affiliations

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

James E Butler et al. Philos Trans A Math Phys Eng Sci. 2008.

Abstract

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 111 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.

PubMed Disclaimer

Similar articles

Cited by

LinkOut - more resources