A new nucleation method to form diamond by chemically pretreating silicon (
Ill)surfaces is reported. The nucleation consists of binding covalently 2,2
-divinyladamantane molecules on the silicon substrate. Then low-pressure di
amond growth was performed for 2 h via microwave plasma CVD in a tubular de
position system. The resulting diamond layers presented a good cristallinit
y and the Raman spectra showed a single very sharp peak at 1331 cm(-1), ind
icating high-quality diamonds.