Abstract
Two infrared internal reflection spectroscopic techniques are used to analyze the composition of the film that grows on hydrophobic silicon at room temperature. A conventional internal reflection technique with a silicon internal reflectance element shows that the silicon surface adsorbs hydrocarbons from the atmosphere. A modified internal reflection technique showed <0.2 nm of SiO and SiO1.5 on the silicon surface one month after a hydrofluoric acid strip. Compared to the rate of contamination, the rate of silicon oxidation at room temperature is considered negligible.
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