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Shape control of size-selected naked platinum nanocrystals

Author

Listed:
  • Yu Xia

    (University of Birmingham, Edgbaston
    Southern University of Science and Technology)

  • Diana Nelli

    (Università degli Studi di Genova)

  • Riccardo Ferrando

    (Università degli Studi di Genova)

  • Jun Yuan

    (University of York, Heslington)

  • Z. Y. Li

    (University of Birmingham, Edgbaston)

Abstract

Controlled growth of far-from-equilibrium-shaped nanoparticles with size selection is essential for the exploration of their unique physical and chemical properties. Shape control by wet-chemistry preparation methods produces surfactant-covered surfaces with limited understanding due to the complexity of the processes involved. Here, we report the controlled production and transformation of octahedra to tetrahedra of size-selected platinum nanocrystals with clean surfaces in an inert gas environment. Molecular dynamics simulations of the growth reveal the key symmetry-breaking atomic mechanism for this autocatalytic shape transformation, confirming the experimental conditions required. In-situ heating experiments demonstrate the relative stability of both octahedral and tetrahedral Pt nanocrystals at least up to 700 °C and that the extended surface diffusion at higher temperature transforms the nanocrystals into equilibrium shape.

Suggested Citation

  • Yu Xia & Diana Nelli & Riccardo Ferrando & Jun Yuan & Z. Y. Li, 2021. "Shape control of size-selected naked platinum nanocrystals," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23305-7
    DOI: 10.1038/s41467-021-23305-7
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