Statistical Evaluation of the Solid-Solution State in Ternary Nanoalloys

Xuan Quy Tran, Yoshiki Kono, Tomokazu Yamamoto, Kohei Kusada, Hiroshi Kitagawa, Syo Matsumura

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Quantitative evaluation of the alloying state in nanoalloy systems is key to understanding their functional properties in a diverse range of applications spanning from catalysis and plasmonics to biomedicine and so forth. Here, we develop a method to statistically and visually represent the sub-nanometer local compositional distribution in ternary nanoparticles (NPs) in terms of ternary histograms and kernel density estimation analysis. Further descriptive statistics is performed within the mathematical framework of compositional data analysis to account for the constant-sum constraint and positivity inherent to the nature of compositional data. The approach has been demonstrated on several conceptual particle models and real systems, namely, Pd-Rh-Ru and Ag-Au-Pd NPs, utilizing experimental X-ray energy-dispersive spectroscopy (XEDS) maps acquired from a scanning transmission electron microscope. We regard this as a useful tool for extending to other well-known configurations such as uniformly mixed solid solutions, core-shell, or phase-decomposed clusters often encountered in other nanoalloy systems. Proposed solutions to overcome common problems associated with NPs such as low X-ray counting and XEDS spectral overlapping are also presented and discussed.

本文言語英語
ページ(範囲)21843-21852
ページ数10
ジャーナルJournal of Physical Chemistry C
124
39
DOI
出版ステータス出版済み - 10 1 2020

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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