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Unraveling the Highly Complex Nature of Antimony on Pt(111)

Guo, Haojie ; Jiménez‐Sánchez, Mariano D. ; Martínez‐Galera, Antonio J. ; Gómez‐Rodríguez, José M.

Advanced materials interfaces, 2022-01, Vol.9 (2), p.n/a [Periódico revisado por pares]

Weinheim: John Wiley & Sons, Inc

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  • Título:
    Unraveling the Highly Complex Nature of Antimony on Pt(111)
  • Autor: Guo, Haojie ; Jiménez‐Sánchez, Mariano D. ; Martínez‐Galera, Antonio J. ; Gómez‐Rodríguez, José M.
  • Assuntos: Annealing ; Antimony ; constraining the growth conditions of antimonene ; High vacuum ; Low energy electron diffraction ; Metal surfaces ; Multilayers ; Periodic structures ; Pt surfaces ; Room temperature ; Scanning tunneling microscopy ; substitutional adsorption of antimony ; Substrates ; Surface alloying ; surface and multilayer alloys
  • É parte de: Advanced materials interfaces, 2022-01, Vol.9 (2), p.n/a
  • Notas: †
    Deceased November 2020
  • Descrição: Understanding the growth behavior of group‐V elements on metal surfaces provides valuable information that can shed light on the feasibility of tailoring atomically thin monoelemental 2D polymorphs composed of pnictogens on these metallic substrates. Here, by combining scanning tunneling microscopy (STM), low energy electron diffraction and Auger electron spectroscopy measurements under ultra‐high vacuum conditions, a wide variety of Sb reconstructions on single‐crystal Pt(111) are identified and characterized. At Sb coverage of ≈0.2 ML, STM data are compatible with a scenario in which Sb atoms are randomly embedded into the topmost layer of Pt, in a substitutional configuration and without establishing a periodic structure. This disorder is robust against thermal annealing and quenching. Increasing the surface coverage and whether or not the sample is annealed, different well‐ordered Sb phases are formed. The Sb structures synthesized at room temperature without any heating process are best interpreted as surface alloys that involve only the first atomic layer. In contrast, experimental evidence points towards the development of multilayer alloy phases for the annealed samples. Combining different experimental techniques under ultra‐high vacuum conditions, the authors investigate the rather complex adsorption behavior of Sb on Pt(111). Experimental data suggest that Sb atoms form alloy structures of different nature, which strongly depend on the coverage and whether the sample is annealed. The results contribute to constrain the growth conditions of antimonene on Pt(111).
  • Editor: Weinheim: John Wiley & Sons, Inc
  • Idioma: Inglês
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