Abstract:
The acetylene-oxygen combustion flame technique was applied to the homoepitaxial deposition of diamond-single crystals on cylindrically shaped {111}, {001} and {110} type IIa natural diamond substrates. After deposition the specimen revealed surface stabilization phenomena like flat facets and curved bands for orientations corresponding to Miller indices {hhk}(h<k) in the {110} zones. The surfaces of all other orientations have a rough appearance, because they are stabilized by the development of microfacets which also have orientations close to {hhk}(h less than or equal to k). The observed phenomena can be explained by a broken bond analysis of the diamond crystal with additional considerations about surface reconstruction by dimer formation.