Tetsuroh Shirasawa, Wolfgang Voegeli and Etsuo Arakawa
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引用次数: 0
Abstract
X-ray absorption spectroscopy (XAS) and small-angle X-ray scattering (SAXS) are common materials characterization tools at synchrotron radiation facilities used in many research fields. Since XAS can provide element-specific chemical states and local atomic structures and SAXS can provide nano-scale structural information, their complementary use is advantageous for a comprehensive understanding of multiscale phenomena. This paper presents a new method for simultaneous XAS/SAXS measurements with synchrotron radiation. The method employs a polychromatic X-ray beam as in the energy-dispersive XAS technique and captures both the transmission XAS spectrum and the SAXS intensity distribution with an area X-ray detector, which eliminates the energy scan in the conventional methods and realizes the simultaneous data acquisition in a shorter time. We succeeded in obtaining the atomic and nano-scale structures of Pt and Pt/Pd nanoparticles with a data acquisition time of 0.1 s, suggesting the potential for real-time observation of multiscale phenomena.
X 射线吸收光谱(XAS)和小角 X 射线散射(SAXS)是同步辐射设施中常用的材料表征工具,可用于许多研究领域。由于 XAS 可以提供特定元素的化学状态和局部原子结构,而 SAXS 可以提供纳米尺度的结构信息,因此二者的互补使用有利于全面了解多尺度现象。本文介绍了一种利用同步辐射同时测量 XAS/SAXS 的新方法。该方法采用了能量色散 XAS 技术中的多色 X 射线束,并通过一个面积 X 射线探测器同时捕获透射 XAS 光谱和 SAXS 强度分布,从而省去了传统方法中的能量扫描,在更短的时间内实现了同步数据采集。我们成功地在 0.1 秒的数据采集时间内获得了铂和铂/钯纳米粒子的原子和纳米尺度结构,为实时观测多尺度现象提供了可能。
期刊介绍:
Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions.
The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.