Topic
Extended X-ray absorption fine structure
About: Extended X-ray absorption fine structure is a research topic. Over the lifetime, 10452 publications have been published within this topic receiving 276744 citations.
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01 Jan 1948
102 citations
TL;DR: In this article, the explosion of a hybrid xerogel containing oxidized pitch and iron nitrate was induced by heat treatment, and the results showed that the Fe7C3 nanocrystals are nested inside amorphous carbon shells that protect them from oxidation by air.
102 citations
TL;DR: In this article, a high pressure/high temperature cell dedicated to x-ray absorption spectroscopy, small angle xray scattering, and inelastic x ray scattering techniques is presented.
Abstract: A high pressure/high temperature cell dedicated to x-ray absorption spectroscopy, small angle x-ray scattering, and inelastic x-ray scattering techniques is presented. The P and T parameters are controlled independently and their range allow the study of aqueous solutions (T⩽500°C and P⩽2000bar) and liquid metals and glasses (T⩽1700°C and P⩽2000bar). The autoclave technology is inspired from previous high pressure/high temperature equipments but great improvements are achieved. Original high pressure windows have been developed to ensure both pressure resistance and low absorbance combined with large angular aperture. Different configurations are available for the internal cell that contains the sample whether it is aqueous or not. As an example of the efficiency of the set-up, we present preliminary x-ray absorption results on 0.01 m FeCl3 aqueous solutions from ambient to supercritical conditions (375 °C and 300 bar). These low concentrations samples and low energy spectra (Fe K-edge is at 7112 eV) repr...
102 citations
102 citations
TL;DR: It appears that Cu in all of the soils is primarily associated with soil organic matter (SOM), and theoretical fitting of the molecular structure in the soil EXAFS spectra revealed that the Cu in the soils existed as Cu atoms bound in a bidentate complex to O or N functional groups.
102 citations