Interpretation of the lineshape in XPS is often crucial to reliable analysis of core level spectra. A major contributor to the lineshape is thermal broadening of the ground state. The effect of thermal broadening on the linewidth of core level and valence band spectra was explored for a series of alkali metal halides: CsF, CsI, NaF, NaI and related compounds. Variation in temperature from -100 °C to +100 °C led to changes in the linewidths for both core level and valence band spectra. Interpretation of the valence band region was supported by theoretical spectra, simulated using density functional theory.
Thin films on the nanoscale represent a solution to the balance between a nanomaterial of beneficial architectural properties and one of functional chemical properties. Due to the size range involved, XPS and related techniques represent an obvious analytical process by which to investigate these films. Here, typical and atypical use of XPS, along with REELS, ISS and several additional techniques is discussed in order to fully explore synthetical procedures and new materials in the development of advanced functional materials for fields such as catalysis and medical devices.
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