Photoelectron diffraction at the surface of amorphous carbon nitride

摘要

The line shape of N 1s photoemission spectra in a certain type of amorphous carbon nitride is shown to depend strongly on the polar angle of photoelectron emission. This effect is explained in terms of photoelectron forward scattering due to preferential orientation of bonds near the surface. An alternative model based on different indepth distributions for each of the nitrogen chemical species does not provide a satisfactory explanation of the observed angular dependence. The changes with polar emission angle of the photoelectron and Auger electron spectra are compared to elucidate the nature of each of the N 1s photoemission peaks.