4.6 Article

Experimental determination of the {111}/{001} surface energy ratio for Pd crystals

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APPLIED PHYSICS LETTERS
卷 117, 期 10, 页码 -

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AMER INST PHYSICS
DOI: 10.1063/5.0022879

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  1. EPSRC [EP/K032518/1, EP/M015173/1]
  2. China Scholarship Council (CSC)

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Pd crystals grown in ultrahigh vacuum (UHV) on nanostructured SrTiO3(001) and anatase TiO2(001) thin film substrates were studied using scanning tunneling microscopy. The crystals have the equilibrium shape of a truncated octahedron with a {111} top facet, {111} and {001} side facets, and a {111} interface. A consistent crystal shape is reached only after annealing the samples in UHV at 450 degrees C or above. By measuring the top facet dimensions of the equilibrium crystals, we determine the ratio of the surface energies for Pd to be gamma 111 / gamma 001 = 0.77 +/- 0.02.

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