Dec 25, 2019

The Stabilization of Germanium Surfaces by Ethylation: II . Chemical Analysis

Radiotracer techniques and mass spectrometry have been employed in analyzing ethylated germanium surfaces; the results from these two analytical techniques are in good agreement. The number of ethyl fragments on a treated (111) germanium surface is the same as the number of surface germanium atoms, within experimental error. The surfaces are stable at temperatures below 200°C in vacuum and in air, but begin evolving C1 and C2 fragments above 200°C. At higher temperatures, additional hydrocarbon fragments are seen mass spectrometrically. Using wafers having labelled ethyl groups, it has been found that the treated surfaces are stable to immersion in common chemical solvents.

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