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XAS-X-ray Absorption Spectroscopy

The excellent properties of synchrotron radiation open up new opportunities for X-ray Absorption Spectroscopy (XAS) especially in:

• In-situ investigation of catalysts
• Characterization of nano-crystalline and amorphous materials for the fabrication of new functional materials
• Identification of the nature of toxic metals causing a contamination

Two specific techniques can be used in a wide range of spatial resolution from mm² to µm²:

XAFS - X-ray Absorption Fine Structure allows conclusions to be drawn with regard to the local atomic structure, i.e. interatomic distances as well as the type and number of neighboring atoms.

XANES - X-ray Absorption Near-Edge Structure or NEXAFS - Near-edge X-ray Absorption Fine Structure is applied for determining the oxidation state of chemical elements as well as for comparative studies as fingerprint method.