The local electronic structure, meaning coordination chemistry and oxidation state, of transition metal elements is a critical scientific issue spanning electrical energy storage, catalysis, environmental contamination, and nanoscience. X-ray absorption fine structure is a premier technique for answering such questions, especially on disordered or amorphous materials.
The MAF hosts the x-ray absorption near edge structure instrument that has been built under the support of the UW’s Clean Energy Institute – hence the CEI-XANES facility. This instrument uses a conventional x-ray source combined with modern highest-quality x-ray optics to achieve fully synchrotron-level, bulk-averaged performance for many XANES measurements of the K-edge of transition metal compounds and the L-edges of lanthanide elements, and Pt, among other possible applications.
The instrument consists of two independent beamlines, each usually configured to run only one element for several weeks to decrease down-time for recalibration and to allow shared use of reference standard spectra taken with the same energy-response function. Spectra can be taken in both transmission and fluorescence-detected modes. Optics are available for most common elements.