Transformation of the diamond (110) surface

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Abstract
The diamond surface undergoes a transformation in its electronic structure by a vacuum anneal ∠900 °C. The transformation is characterized by the appearance of a feature in the band gap region of the energy loss spectrum. The kinetics of the transformation on the (110) surface have been studied by observing the growth of this feature with time and temperature. It is found that the transformation is consistent with first order kinetics with an activation energy of 4.8 eV. It is also found that the band gap feature could be removed by exposing the transformed surface to excited hydrogen. These results are consistent with the polished diamond (110) surface being covered with hydrogen which removes the band gap states and can be thermally desorbed at ∠900 °C.

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