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Journal Articles Nanoscale Year : 2018

Shape selection through epitaxy of supported platinum nanocrystals

Thomas Blon


Supported nanocrystals of original shapes are highly desirable for the development of optimized catalysts; however, conventional methods for the preparation of supported catalysts do not allow shape control. In this work, we have synthesized concave platinum nanocubes exposing {110} crystallographic facets at 20 °C. In the presence of a crystallographically oriented Pt(111) support in the reaction medium, the concave nanocubes grow epitaxially on the support, producing macroscopic nanostructured surfaces. Higher reaction temperature produces a mixture of different nanostructures in solution; however, only the nanostructures growing along the 〈111〉 direction are obtained on the Pt(111) support. Therefore, the oriented surface acts as a template for a selective immobilization of specific nanostructures out of a mixture, which can be regarded as an “epitaxial resolution” of an inhomogeneous mixture of nanocrystals. Thus, a judicious choice of the support crystallographic orientation may allow the isolation of original nanostructures that cannot be obtained in a pure form.
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Dates and versions

hal-02001918 , version 1 (21-11-2020)



Laurent Peres, Deliang Yi, Susana Bustos-Rodriguez, Cécile Marcelot, Alexandre Pierrot, et al.. Shape selection through epitaxy of supported platinum nanocrystals. Nanoscale, 2018, 10 (48), pp.22730-22736. ⟨10.1039/x0xx00000x⟩. ⟨hal-02001918⟩
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