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通过结合ADF-EDX模拟来区分PtNi八面体纳米颗粒的结构。

Differentiating the structure of PtNi octahedral nanoparticles through combined ADF-EDX simulations.

作者信息

MacArthur Katherine E, Heggen Marc, Dunin-Borkowski Rafal E

机构信息

Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany.

出版信息

Adv Struct Chem Imaging. 2018;4(1):2. doi: 10.1186/s40679-018-0053-x. Epub 2018 Feb 20.

DOI:10.1186/s40679-018-0053-x
PMID:29497598
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5820384/
Abstract

Advances in catalysis rely on the synthesis and characterisation of nanoparticles that have tailored structures and compositions. Although energy-dispersive X-ray (EDX) spectroscopy can be used to study local variations in the compositions of individual supported nanoparticles on the atomic-scale in the scanning transmission electron microscope, electron beam induced damage and contamination can preclude the use of long exposure times and tomographic approaches. Here, we perform simulations of EDX maps of seven different octahedral PtNi nanoparticles for a selection of crystallographic orientations and tilts, to evaluate which of them can be distinguished from elemental mapping performed in only one orientation.

摘要

催化领域的进展依赖于具有定制结构和组成的纳米颗粒的合成与表征。尽管能量色散X射线（EDX）光谱可用于在扫描透射电子显微镜中在原子尺度上研究单个负载纳米颗粒组成的局部变化，但电子束诱导的损伤和污染可能会妨碍使用长时间曝光和断层扫描方法。在此，我们针对七种不同的八面体PtNi纳米颗粒的选定晶体取向和倾斜度进行了EDX图谱模拟，以评估其中哪些可以与仅在一个取向进行的元素映射区分开来。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/92a0e136d0cf/40679_2018_53_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/e33792d3e1dc/40679_2018_53_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/1010c10098a6/40679_2018_53_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/ed33287a79e4/40679_2018_53_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/fa1afa3c0a07/40679_2018_53_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/65fd17747567/40679_2018_53_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/bb82a26c3289/40679_2018_53_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/eff936eefa78/40679_2018_53_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/f5730a9e5b4b/40679_2018_53_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/85bb99870687/40679_2018_53_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/92a0e136d0cf/40679_2018_53_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/e33792d3e1dc/40679_2018_53_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/1010c10098a6/40679_2018_53_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/ed33287a79e4/40679_2018_53_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/fa1afa3c0a07/40679_2018_53_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/65fd17747567/40679_2018_53_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/bb82a26c3289/40679_2018_53_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/eff936eefa78/40679_2018_53_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/f5730a9e5b4b/40679_2018_53_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/85bb99870687/40679_2018_53_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a16f/5820384/92a0e136d0cf/40679_2018_53_Fig10_HTML.jpg

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