Surface structure of finely dispersed iron stabilized by spontaneous adsorption as derived from XPS and ESR evidence

Abstract

Certain specific features of surface structure and modifying layer depth of some finely dispersed iron specimens stabilized by means of spontaneous adsorption have been examined on the basis of XPS data. The modifying layer depths obtained from an integral intensity ratio of Fe2p and Fe3p components in the XPS spectra proved to be in good agreement with those calculated from ferromagnetic resonance line widths using our model of ferromagnetic resonance in magnetic nanoparticles aggregates. Self-assembling films of different molecules with isolated double CC bonds on the finely dispersed iron surface are characterized by highly ordered unsaturated bonds of neighboring molecules. The formation of a system involving conjugated double bonds manifests itself in the decrease of C1s photoelectrons binding energy and the appearance of a new component at 284 eV in C1s XPS spectra. Strong magnetic fields on the surface of finely dispersed iron is likely to be responsible for a high ordering of unsaturated adsorbate molecules.