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Title: Interface and heterostructure design in polyelemental nanoparticles

Journal Article · · Science
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [4]
  1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Northwestern Univ., Evanston, IL (United States). International Inst. for Nanotechnology
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
  3. Northwestern Univ., Evanston, IL (United States). International Inst. for Nanotechnology; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
  4. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Northwestern Univ., Evanston, IL (United States). International Inst. for Nanotechnology; Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry

Nanomaterials that form as heterostructures have applications in catalysis, plasmonics, and electronics. Multielement nanoparticles can now be synthesized through a variety of routes, but how thermodynamic phases form in such structures and how specific interfaces between them can be designed and synthesized are still poorly understood. We explored how palladium-tin alloys form mixed-composition phases with metals with known but complex miscibilities. Nanoparticles with up to seven elements were synthesized, and many form triphase heterostructures consisting of either three-interface or two-interface architectures. Density functional theory calculations and experimental work were used to determine the balance between the surface and interfacial energies of the observed phases. From these observations, design rules have been established for making polyelemental systems with specific heterostructures, including tetraphase nanoparticles with as many as six junctions.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE
OSTI ID:
1530851
Journal Information:
Science, Vol. 363, Issue 6430; ISSN 0036-8075
Country of Publication:
United States
Language:
English

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