| Autor: |
Kuhrt, Ch., Harsdorff, M. |
| Zdroj: |
Philosophical Magazine B; June 1991, Vol. 63 Issue: 6 p1247-1254, 8p |
| Abstrakt: |
Pd films (equivalent thickness 0.1 nm < d < 10nm) were prepared in ultra-high vacuum by vapour deposition on NaCl(100) cleavage planes at different constant temperatures (Ts = 80 K, 300 K, 570 K) and investigated with photoelectron spectroscopy and transmission electron microscopy. The films are discontinuous because of three-dimensional growth. Since in photoelectron spectroscopy the nonconducting substrate charges by an unknown amount, an investigation was made as to whether the core levels of the Pd films can be used as a binding energy reference for the substrate electronic system. This was found to be so only if the films are not too heterogeneous, that is in the case of high surface coverage (A > 40%) or very flat Pd islands ((film thickness d)/(surface coverage A) ≤ 1·5nm). Otherwise an inaccuracy of up to ΔEB = 2·7 eV occurs because of differential charging of covered and uncovered NaCl surface regions during photoemission. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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