In order to further understand the fundamental properties of the hematite photoexcited state, we conducted femtosecond 2p (L 3) X-ray absorption (XAS) and 2p3d resonant inelastic scattering (RIXS) measurements on hematite thin-films at the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL). The observed spectral changes and kinetic processes are in agreement with previous 3p.
The local vibrational dynamics of hematite (?-Fe2O3) has been investigated by temperature-dependent extended x-ray absorption fine structure spectroscopy and molecular dynamics simulations. The local dynamics of both the short and long, Hematite – an overview | ScienceDirect Topics, X-Ray Mass Attenuation Coefficients | NIST, Hematite – an overview | ScienceDirect Topics, Hematite – an overview | ScienceDirect Topics, 11/15/2016 · In this research, we investigated fundamental dependencies in lead adsorption to hematite by coupling extended X -ray absorption fine structure (EXAFS) spectroscopy on hematite particles (10 and 50 nm) with resonant anomalous X -ray reflectivity (RAXR) to single crystals expressing the (001), (012), or (110) crystallographic face.
understand the fundamental properties of the hematite photoexcited state, we conducted femtosecond 2p (L 3) X-ray absorption (XAS) and 2p3d resonant inelastic scattering (RIXS) measurements on hematite thin-films at the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL).
Abstract This paper reports on the X-ray absorption analysis of samples of mineral dust emitted from or transported to Western Africa. We found that iron oxides account, by mass, for 38% to 72% of the total elemental iron. They are composed of minerals in the Fe(III) oxidation state: goethite (FeO·OH) and hematite (Fe 2O 3). The apparent fraction of iron oxide attributed to goethite is higher than hematite.
The absorption depth is defined as the depth at which 63% of the photons are absorbed. For hematite , the absorption depth has to be thicker because of its indirect (d ? d) band gap transition [15]. This is a problem because it will need a relatively higher thickness.
Linear combination fit of the iron extended X -ray fine structure spectrum (EXAFS) show that 3 samples from the Nu-Salween River contain 20% ferrihydrite and 10% goethite without any hematite being …
4/1/1999 · The speciation of chromium in overlayers on atomically clean surfaces of single crystal magnetite (Fe 3 O 4) and hematite (?-Fe 2 O 3) were studied using Cr L-edge, Fe L-edge, and O K-edge X -ray absorption spectra collected with synchrotron radiation.The overlayers were produced by reaction of the surfaces with 5 mM or 50 ?M Na 2 CrO 4 aqueous solutions in a N 2-filled glove bag in opaque …
Operando X -ray Absorption Spectroscopy (XAS) Observation of Photoinduced Oxidation in FeNi (Oxy)hydroxide Overlayers on Hematite (?-Fe2O3) Photoanodes for Solar Water Splitting. Langmuir 2020 , 36 (39) , 11564-11572.
