Figure 3.
(a) Pt-4f and Te-3d core levels for the as-cleaved Pt3Te4 surface and its modifications upon exposure to 1010 L of O2 and H2O and, moreover, after storage in air. (b) Vibrational spectrum of air-exposed Pt3Te4, obtained by high-resolution electron energy loss spectroscopy with an impinging energy of 6 eV. (c, d) Morphological evolution of a Pt3Te4 flake of 70 nm from (c) sample preparation up to (d) a prolonged exposure to air (one month). (e) Height profile as a function of the distance along dashed white lines in panels c and d. Prolonged storage in air up to 1 month did not provide noticeable morphological changes.