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从液体喷射纳米粒子悬浮中使用Femtosecond X射线脉冲的对分布函数

Lise Joost Støckler¹, Rasmus Stubkjaer Christensen¹, Magnus Kløve¹

¹Center for Integrated Materials Research, Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus, 8000, Denmark.

Chemphyschem : a European journal of chemical physics and physical chemistry

|September 14, 2023

概括

在SACLA X射线自由电子激光器 (XFEL) 的超快X射线散射成功分析了二氧化 (HfO2) 纳米粒子,产生了可靠的结构数据. 这表明了研究费米秒时间尺度上的无序系统的潜力.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
纳米技术纳米技术

背景情况:

了解纳米粒子的动态结构性质对于开发先进材料至关重要.
五秒X射线散射提供了一种强大的探测器,用于捕捉短暂的结构变化.

研究的目的:

评估使用X射线自由电子激光 (XFEL) 进行超快对分布函数 (PDF) 分析的可行性.
在液体喷气环境中研究二氧化 (HfO2) 纳米颗粒的结构特征.

主要方法:

在SACLA XFEL设施收集在液体喷气中悬浮的HfO2纳米粒子的X射线散射数据.
收集的散射数据对分布函数 (PDF) 分析.
将PDF结果与从同步机源 (PETRA III) 获得的数据进行比较.

主要成果:

从XFEL数据中获得了一个有前途的PDF,尽管Qmax值约为8 Å-1.1.
关键的PDF特征与同步仪数据一致,验证了XFEL方法.
可靠的结构参数,包括单元细胞尺寸和颗粒大小,从XFEL PDF.中改进.

结论:

五秒时间尺度的PDF分析对于研究无形和无序系统是可行的.
优化实验条件可以进一步提高来自XFEL源的PDF数据的质量.
这项研究为超快的结构科学研究开辟了新的途径.

关键词:

一个X射线自由电子激光.五秒钟研究的研究.纳米粒子核化的核化.配对分配函数的配对分布函数结构动力学结构动力学

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