| Time：1150318 (Wed.) 14:20~16:20 Speaker：Prof.宋艷芳(SONG, Yen-Fang) 國家同步輻射研究中心實驗設施組X光影像小組/X-ray Imaging Group, Experimental Facility Division, National Synchrotron Radiation Research Center Title：Synchrotron Radiation X-ray Tomography and Applications Abstract： Projection X-ray microscopy (PXM)/Transmission X-ray microscopy (TXM) end- station at TPS 31A beamline of National Synchrotron Radiation Research Center (NSRRC) provides high resolution tomography for 3D internal structure observation and quantitative analysis1. The peculiarity of PXM/TXM includes nondestructive detection, fast acquisition, large field of view, high spatial resolution (PXM:1 μm, TXM: 50 nm) and aqueous specimen available. There are two operation modes of PXM: (1) PXM with double W-Si/Si multilayer monochromater (DMM) mode supplies the energy range of 5–42 keV, 0.5%~6% energy resolution (ΔE/E) and 1 μm spatial resolution. (2) PXM with double Si(111) crystal monochromator (DCM) mode offers the energy range of 5–30 keV, 1.5×10-4 energy resolution (ΔE/E) and 1 μm spatial resolution. The field of view of PXM and TXM is 16×14 mm2 and 40×38μm, respectively. The tomography was executed by rotating the specimen azimuthally with a 0.25° interval through ±90° range for 721 and 181 2D frames for PXM and TXM, respectively. And then reconstructed all 2D frames as a 3D tomography through an in-house developed software using filtered-back-projection algorithm. Finally, we used Amira software (Thermo Fisher Scientific Inc.) to visualize and analyze 3D tomography of the samples. The temporal resolution of PXM can approach 1 min/tomography. The in-operando tomography and energy-resolved elemental mapping within 2D image of PXM are feasible. PXM and TXM are significant techniques for the extensive need of many disciplines, such as polymeric material, biology, medical biology, energy storage material, high entropy metal, iron-steel material, environmental science, geology and paleontology, etc. In this presentation, I will introduce the instruments of PXM and TXM and several applications, such as (1) Collagen hydrogel for recovery of muscle loss (2) Hydrogel nanocomposite for wound healing (3) Photothrombosis-on-a-chip system for thrombus formation and therapies effect (4) Quantitative analysis of bone structure (5) Hydroxyapatite/silk fibroin scaffolds for bone defect repair (6) Trichome formation of peach and nectarine (7) Quantitative analysis of lithium/sodium ion batteries, etc. PXM and TXM are superior technologies for micro- and nano- structure investigation and advanced material development. Key words: projection X-ray microscopy, transmission X-ray microscopy Reference: [1] Yen-Fang Song* et. al, “Projection X-ray Microscopy and Transmission X-ray Microscopy at the Taiwan Photon Source”, Synchrotron Radiation News 2024, 37, No. 5, 26-33. Place：S101, Gongguan Campus, NTNU |
