RECENT DEVELOPMENTS AND RESEARCHES BY USING SCANNING TRANSMISSION X-RAY MICROSCOPY IN UVSOR SYNCHROTRON

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.