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Updated: Jul 20, 2025
Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
Published on: August 23, 2018
Structural Anisotropy-Driven Atomic Mechanisms of Phase Transformations in the Pt-Sn System
Hwanhui Yun1,2, Delin Zhang3, Turan Birol1
1Chemical Engineering and Materials Science, University of Minnesota, Twin Cities, Minneapolis, Minnesota 55455, United States.
Atomic movements during solid-state phase transformations in Platinum-Tin (Pt-Sn) intermetallics were observed. The crystal structure of the parent phase dictates the transformation pathway and atomic rearrangements.
Area of Science:
- Materials Science
- Solid-State Physics
- Nanotechnology
Background:
- Phase transformations in intermetallic systems are crucial for material properties.
- Understanding atomistic mechanisms is key to controlling material behavior.
Purpose of the Study:
- To investigate the atomistic mechanisms of solid-to-solid phase transformations in the Pt-Sn system.
- To reveal how crystal structure influences phase transformation pathways.
Main Methods:
- Utilized *in situ* atomic-resolution scanning transmission electron microscopy (STEM).
- Analyzed atomic movements and rearrangements during phase transitions.
- Examined atomic configurations at transformation fronts.
Main Results:
- Observed atomic movements and rearrangements in Pt-Sn phase transformations.
- Identified intermediate structures and templating effects of parent phase anisotropy.
- Elucidated diffusion pathways and lattice distortions during transformations.
Conclusions:
- The anisotropic crystal structure of parent phases dictates solid-to-solid phase transformation mechanisms in Pt-Sn.
- This study provides insights into structural parameters governing phase transformations in technologically relevant intermetallics.
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