Sergio Stizza

TL;DR: An EXAFS (extended x-ray-absorption fine structure) study of nanocrystalline iron prepared by high-energy ball milling is presented and a simple model which takes into account the presence of atomic defects is shown to lead to marked reduction of coordination numbers and three-atom multiplicities in agreement with the experimental data.

TL;DR: A detailed discussion about the origin of all the different features in the experimental XAS spectra and a method to extract small contributions in the EXAFS part of the spectrum is presented.

TL;DR: In this paper, the authors compared the properties of amorphous and crystalline Li 1+ x V 3 O 8 and showed that the V-O distances are more homogeneous in the amorphized form and partial amorphization occurs in the crystalline form upon Li + intercalation.

TL;DR: In this article, multiple scattering calculations using clusters of two shells around the oxygen and silicon atoms, respectively, are in good agreement with experimental absorption spectra and confirm mean Si-O-Si angles between 130 and 144° for these samples, and a decrease of the mean angle with densification.

TL;DR: In this paper, a large red shift in the energy of the plasmon resonance in metallic V${\mathrm{O}}_{2}$ has been observed by decreasing the temperature near the metal-to-insulator phase transition.