Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-55287 Zeitschriftenartikel Lilensten, L.; Provost, K.; Perrière, L.; Fonda, E.; Couzinié, J.; Amman, F.; Radtke, Martin; Dirras, G.; Guillot, I. Experimental investigation of the local environment and lattice distortion in refractory medium entropy alloys EXAFS analysis of pure elements, binary and ternary equiatomic refractory alloys within the Nb-Zr-Ti-Hf- Ta system is performed at the Nb and Zr K-edges to analyze the evolution of the chemical local environ- ment and the lattice distortion. A good mixing of the elements is found at the atomic scale. For some compounds, a distribution of distances between the central atom and its neighbors suggests a distortion of the structure. Finally, analysis of the Debye-Waller parameters shows some correlation with the lat- tice distortion parameter δ², and allows to quantify experimentally the static disorder in medium entropy alloys. Elsevier Ltd. 2022 Scripta Materialia 211 1 6 10.1016/j.scriptamat.2022.114532 2022-07-18 OPUS4-39805 Zeitschriftenartikel Saravanan, S.; Balamurugan, M.; Lippitz, Andreas; Fonda, E.; Swaraj, Sufal XANES studies of titanium dioxide nanoparticles synthesized by using Peltophorum pterocarpum plant extract The preparation and characterization of a Titanium dioxide (TiO2) by a simple, cost effective, facile and eco-friendly green synthesis method using Peltophorum pterocarpum plant extract is presented. The green synthesized nanoparticles were characterized using X-ray diffraction (XRD), Raman spectroscopy, High-resolution transmission electron microscopy (HR-TEM) and X-ray absorption near edge spectroscopy (XANES). XRD results show that the prepared TiO2 NPs were significantly crystalline with various percentages of anatase and rutile phases. The nanoparticles were found to have different diameters ranging from 20 to 80 nm. No evidence of any intermediate or different TiO2 phases were found in XANES measurements performed at the Ti K- and L-edge. It is shown that the TiO2 NPs with high uniformity, high surface area and minimum aggregation can be prepared with relative ease and the desired anatase: rutile phase ratio can be obtained by controlling the experimental conditions. Amsterdam Elsevier B.V. 2016 Physika B 503 86 92 10.1016/j.physb.2016.09.011 2017-04-12