2015年5月14日 · In this work, the short-range atomic structure of amorphous germanium diselenide (a-GeSe 2) is studied at both Ge and Se atomic sites by performing two-edges high-pressure XAS experiments up to...

2025年1月19日 · In contrast, the Ge K-edge XAS spectra of the three natural quartz samples containing multiply-compensated GECs detected by EPR after artificial irradiation all indicate the presence of Ge 2+ (Fig. 4,5). Therefore, these Ge K-edge XAS results confirm the EPR interpretation for mixed Ge4 + and Ge 2+ states in the

2024年2月3日 · Based on XAS experiments, we develop a theoretical model of the amorphous GeTe structure, consisting of a disordered fcc-type Te sublattice and randomly arranged chains of Ge atoms in a ...

2011年9月1日 · We studied formation of nano-Ge particles in an organic solvent (diglyme) by a heterogeneous metathesis/comproportionation reaction between dissolved GeCl 4 (Ge 4+) and suspended Mg 2 Ge (Ge 4−). We have characterised the solid state starting material Mg 2 Ge using XAS/EXAFS along with Raman spectroscopy.

X射线吸收细结构光谱 (X-ray absorption fine structure, XAFS)是一种基于同步辐射光源的分析方法。 它测量的基本物理量为X射线质量吸收系数μ (E)。

2018年12月1日 · Herein, using first principle calculations, we systematically investigated a new kind of 2D XAs (X = Si, Ge, Sn). After verifying their stabilities, we found that SiAs and SnAs monolayers possess direct band gaps of 2.35 and 1.69 eV, while GeAs has an indirect band gap of 2.08 eV by HSE hybrid functional with the inclusion of spin-orbit ...

Bruce Ravel's XAS Education Materials Talks. These folders contain the LaTeX source for my talks. All talks use LaTeX and the Beamer LaTeX class. All images are included, usually as .png or .jpg files. Source material (e.g. .svg, GIMP .xcf, LibreOffice .odg, Xfig .fig) are deposited for some images and must be converted to PDF, png, or jpg.

The Ge K-edge XAS signals of crystalline (c-GeSe2, dots) and amorphous (a-GeSe2) are compared in the left panel. Differences in the low k region and in the XAS amplitude are related to the ...

XAS（synchrotron X-ray absorption spectroscopy）可以提供有关配位环境和被探测原子化学状态等有价值的信息，并且硬X射线具有研究原位电化学反应动态过程的能力，有利于建立更精确的构效关系，成为当下催化剂机理研究的不二之选！

2024年4月2日 · Pressure-induced transformations in an archetypal chalcogenide glass (GeSe 2) have been investigated up to 157 GPa by X-ray absorption spectroscopy (XAS) and molecular dynamics (MD) simulations. Ge and Se K-edge XAS data allowed simultaneous tracking of the correlated local structural and electronic changes at both Ge and Se sites.