Bulk diffusion of microwave plasma activated deuterium into undoped natural diamond

Laikhtman, A.; Hoffman, A.; Cytermann, C.
August 2001
Applied Physics Letters;8/20/2001, Vol. 79 Issue 8, p1115
Academic Journal
In the present work undoped natural (100)-, (111)-, and (110)-oriented diamonds were exposed to microwave deuterium plasma. Secondary ion mass spectroscopy (SIMS) in static mode showed that surface deuterium concentration is the highest for (110) surface and the lowest one for (100)-oriented diamond. SIMS depth profile measurements unambiguously revealed the bulk diffusion of deuterium in the concentration of 10[sup 20]–10[sup 21] atoms/cm[sup 3]. Relative bulk concentrations of deuterium in the three differently oriented diamonds retained those on the surface. The measured diffusion length of deuterium is ∼0.6 μm. These results support previously performed theoretical calculations and enlighten the data obtained from absolute quantum photoyield measurements of hydrogenated natural diamond recently reported by us. © 2001 American Institute of Physics.


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