journal article·2022-07-22Open access

Z-Contrast Enhancement in Au–Pt Nanocatalysts by Correlative X-ray Absorption Spectroscopy and Electron Microscopy: Implications for Composition Determination

Yang Liu, Maichong Xie, Nicholas Marcella, Alexandre C. Foucher, Eric A. Stach, Marc R. Knecht, Anatoly I. Frenkel

ACS Applied Nano Materials· Volume 5· Issue 7

Abstract

The properties of bimetallic nanoparticles (BNPs) vary widely as a function of their composition and size distributions. X-ray absorption fine structure analysis is commonly used to characterize their structure, but its application to elements that are close to each other in the periodic table is hampered by poor Z-contrast. We trained an artificial neural network to recognize the partial coordination numbers in AuPt NPs synthesized via peptide templating using their X-ray absorption near-edge structure spectra. This approach, combined with scanning transmission electron microscopy analysis, revealed unique details of this prototype catalytic system that has different forms of heterogeneities at both the intra- and inter-particle levels. Our method based on the enhancement of Z-contrast of metal species will have implications for compositional studies of BNPs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Machine Learning in Materials Science · Electron and X-Ray Spectroscopy Techniques · Advanced Electron Microscopy Techniques and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States

Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States

Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States

Dr. J.T. Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, Florida 33136, United States

Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States

Funding

Division of Chemistry · Basic Energy Sciences

References (42)

Show source-provided references
1. 10.1002/adfm.20190926010.1002/adfm.201909260 ↗
2. 10.1021/nl070694a10.1021/nl070694a ↗
3. 10.1021/nn900242v10.1021/nn900242v ↗
4. 10.1021/cr300096b10.1021/cr300096b ↗
5. 10.1126/science.113456910.1126/science.1134569 ↗
6. 10.1021/acscatal.6b0071410.1021/acscatal.6b00714 ↗
7. 10.1021/acs.chemmater.7b0186010.1021/acs.chemmater.7b01860 ↗
8. 10.1088/1367-2630/aa57bf10.1088/1367-2630/aa57bf ↗
9. 10.1039/c2cs35174a10.1039/c2cs35174a ↗
10. 10.1021/ja052661810.1021/ja0526618 ↗
11. 10.1103/physrevb.80.06411110.1103/physrevb.80.064111 ↗
12. 10.1021/acs.chemmater.6b0377910.1021/acs.chemmater.6b03779 ↗
13. 10.1063/1.479050910.1063/1.4790509 ↗
14. 10.1021/acs.jpclett.7b0236410.1021/acs.jpclett.7b02364 ↗
15. 10.1021/acs.jpclett.0c0323110.1021/acs.jpclett.0c03231 ↗
16. 10.1039/d0cp02098b10.1039/d0cp02098b ↗
17. 10.1021/acsami.1c0671410.1021/acsami.1c06714 ↗
18. 10.1063/1.512659710.1063/1.5126597 ↗
19. 10.1103/physrevlett.124.15640110.1103/physrevlett.124.156401 ↗
20. 10.1063/5.004911110.1063/5.0049111 ↗
21. 10.1038/s41524-018-0067-x10.1038/s41524-018-0067-x ↗
22. 10.1002/anie.20140103510.1002/anie.201401035 ↗
23. 10.1038/s41467-021-22715-x10.1038/s41467-021-22715-x ↗
24. 10.1021/la801468c10.1021/la801468c ↗
25. 10.1021/j100490a01810.1021/j100490a018 ↗
26. 10.1021/cm800419810.1021/cm8004198 ↗
27. 10.1021/acs.langmuir.7b0189610.1021/acs.langmuir.7b01896 ↗
28. 10.1002/chem.20060149210.1002/chem.200601492 ↗
29. 10.1021/la049258j10.1021/la049258j ↗
30. 10.1039/b413074j10.1039/b413074j ↗
31. 10.1021/ja907454f10.1021/ja907454f ↗
32. 10.1039/ft991870388110.1039/ft9918703881 ↗
33. 10.1039/b926434e10.1039/b926434e ↗
34. Bunău O. · J. Phys.: Condens. Matter · 2009 · 21 · 345501
35. 10.1103/physrev.138.a138410.1103/physrev.138.a1384 ↗
36. 10.1039/c8nr04866e10.1039/c8nr04866e ↗
37. 10.1021/acs.jpcc.1c1082410.1021/acs.jpcc.1c10824 ↗
38. 10.1002/cctc.20190184710.1002/cctc.201901847 ↗
39. 10.1038/ncomms858310.1038/ncomms8583 ↗
40. 10.1021/la052686k10.1021/la052686k ↗
41. 10.1021/acs.jpcc.7b0627010.1021/acs.jpcc.7b06270 ↗
42. 10.1021/ja026824t10.1021/ja026824t ↗