Composition-dependent ordering transformations in Pt–Fe nanoalloys
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- Materials Science and Engineering Program, State University of New York at Binghamton, Binghamton, NY 13902, Department of Mechanical Engineering, State University of New York at Binghamton, Binghamton, NY 13902
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973
- Department of Condensed Matter Physics and Materials, Brookhaven National Laboratory, Upton, NY 11973, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
- Department of Condensed Matter Physics and Materials, Brookhaven National Laboratory, Upton, NY 11973
Significance Dynamically understanding the microscopic processes governing ordering transformations has rarely been attained. The situation becomes even more challenging for nanoscale alloys, where the significantly increased surface-area-to-volume ratio not only opens up a variety of additional freedoms to initiate an ordering transformation but also allows for kinetic interplay between the surface and bulk due to their close proximity. We provide direct evidence of the microscopic processes controlling the ordering transformation through the surface–bulk interplay in Pt–Fe nanoalloys and new features rendered by variations in alloy composition and chemical stimuli. These results provide a mechanistic detail of ordering transformation phenomena which are widely relevant to nanoalloys as chemical ordering occurs in most multicomponent materials under suitable environmental bias.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Binghamton, NY (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0001135; SC0012704; SC0019445
- OSTI ID:
- 1857359
- Report Number(s):
- BNL-223021-2022-JAAM; e2117899119
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 14 Vol. 119; ISSN 0027-8424
- Publisher:
- Proceedings of the National Academy of SciencesCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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