Growth of Cuprous Oxide Particles in Liquid-Phase Synthesis Investigated by X-ray Laser Diffraction,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Growth of Cuprous Oxide Particles in Liquid-Phase Synthesis Investigated by X-ray Laser Diffraction
Nano Letters ( IF 9.6 ) Pub Date : 2018-07-10 00:00:00 , DOI: 10.1021/acs.nanolett.8b02153
Tomotaka Oroguchi _{1,

2} , Takashi Yoshidome ₃ , Takahiro Yamamoto _{1,

2} , Masayoshi Nakasako _{1,

2}

Affiliation

Cuprous oxide (Cu₂O) particles obtained by surfactant-assisted liquid-phase synthesis have cuboid shapes but the internal structures are difficult to be visualized by electron microscopy. Herein, we investigated the internal structures of numerous individual Cu₂O particles with submicrometer dimensions by X-ray diffraction imaging (XDI) using X-ray free-electron laser (XFEL) pulses. The reconstructed two-dimensional electron density maps, which displayed inhomogeneous internal structures, were divided into five classes characterized by the positions and shapes of high and low electron density areas. Further analysis of the maps in each class by a manifold learning algorithm revealed that the internal structures of Cu₂O particles varied in correlation with total electron density while retaining the characteristics within each class. On the basis of the analyses, we proposed a growth mechanism to yield the inhomogeneity in the internal structures of Cu₂O particles in surfactant-mediated liquid-phase synthesis.

中文翻译：

X射线激光衍射研究液相合成过程中氧化亚铜颗粒的生长

通过表面活性剂辅助液相合成获得的氧化亚铜（Cu ₂ O）颗粒具有长方体形状，但是其内部结构很难通过电子显微镜观察。本文中，我们使用X射线自由电子激光（XFEL）脉冲通过X射线衍射成像（XDI）研究了许多亚微米级的Cu ₂ O颗粒的内部结构。重建后的二维电子密度图显示了不均匀的内部结构，分为五类，分别以高和低电子密度区域的位置和形状为特征。通过流形学习算法对每个类中的图进行进一步分析，发现Cu ₂的内部结构O粒子与总电子密度相关联地变化，同时保留每个类别内的特性。在分析的基础上，我们提出了一种在表面活性剂介导的液相合成中产生Cu ₂ O颗粒内部结构不均匀性的生长机理。

更新日期：2018-07-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11