Triangular Structures on {111} Surfaces of Diamond Crystals Synthesized by the Hot-Filament CVD Method

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Abstract
The morphology of the diamond crystal deposited by a hot-filament method has been studied by a high-resolution scanning electron microscope to elucidate the mechanism of the crystal growth. The growth of {111} faces is multinucleation, and the {111} surface consists of both many small triangles whose orientations are the same as those of the original {111} face of a cubo-octahedron and triangular pits surrounded by three triangles. The appearance of three {110} surfaces at the edge of the {111} surface is possibly explained by the inhomogeneity of the active carbon concentration oh the {111} surface.