Shape selection through epitaxy of supported platinum nanocrystals. Issue 48 (30th November 2018)

• Record Type: Journal Article
• Authors: Peres, Laurent; Yi, Deliang; Bustos-Rodriguez, Susana; Marcelot, Cécile; Pierrot, Alexandre; Fazzini, Pier-Francesco; Florea, Ileana; Arenal, Raul; Lacroix, Lise-Marie; Warot-Fonrose, Bénédicte; Blon, Thomas; Soulantica, Katerina
• Is Part Of: Nanoscale. Volume 10:Issue 48(2018)
• Page Start: 22730
• Page End: 22736
• Publication Date: 2018-11-30
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr07515h
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Epitaxial resolution of a mixture of nanostructures through growth on a crystallographically oriented surface. Abstract : 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.