Transformation of Raman Spectra from a Titanium Surface after Contact with Fluorine-Containing Gases

The authors study the behavior of the Raman spectra of titanium foils after they come into contact with a fluorine–gas mixture. It is shown that the bands at 905, 1795, and 2680 cm−1 correspond to fluorine under a titanium oxide nanofilm. The contact between such a foil and humid air reduces the intensity of these bands, while those of titanium oxynitrides and oxyfluorides emerge and grow brighter.