Abstract:
A scanning transmission X-ray microscope (STXM) is a synchrotron radiation-based analytical
tool to acquire 2-dimensional X-ray absorption spectra of a sample. Generally, STXM uses
a Fresnel zone plate as a focusing optics for X-rays and spatial resolution higher than 30 nm
became available in these years. By using STXM in soft X-ray region, many absorption edges
of light elements and transition metals exist and detailed analysis of their near edge X-ray absorption fine structures (NEXAFS) brings us chemical state of the specific elements. One of
remarkable advantages of STXM is flexibility of environment around a sample, since the Xray has high transmittance. This advantage enables STXM to measure the sample in water,
in humidity or in atmospheric pressure by designing special sample cells. Hence, at a STXM
beamline, BL4U , in UVSOR synchrotron (Okazaki, Japan), we have been developing special
measurement techniques such as in-situ electrochemistry, in-situ humidity control techniques,
3-dimensional spectroscopy by using computer tomography and the other techniques which are
quite difficult to perform for the other microscopic tools. In this presentation, developments,
recent researches, and a collaborative project among several facilities, linkage analytical techniques in Hayabusa2 project, will be shown.
