Moiré Induced Organization of Size-selected Pt Clusters Soft Landed on Epitaxial Graphene

Overview

Journal Sci Rep

Specialty Science

Date 2015 Aug 18

PMID 26278787

Citations 2

Authors

Sebastien Linas

Fabien Jean

Tao Zhou

Clement Albin

Gilles Renaud

Laurent Bardotti

Florent Tournus

Affiliations

Soon will be listed here.

Abstract

Two-dimensional hexagonal arrays of Pt nanoparticles (1.5 nm diameter) have been obtained by deposition of preformed and size selected Pt nanoparticles on graphene. This original self-organization is induced, at room temperature, by the 2D periodic undulation (the moiré pattern) of graphene epitaxially grown on the Ir(111) surface. By means of complementary techniques (scanning tunneling microscopy, grazing incidence X ray scattering), the Pt clusters shapes and organization are characterized and the structural evolution during annealing is investigated. The soft-landed clusters remain quasi-spherical and a large proportion appears to be pinned on specific moiré sites. The quantitative determination of the proportion of organized clusters reveals that the obtained hexagonal array of the almost spherical nanoparticles is stable up to 650 K, which is an indication of a strong cluster-surface interaction.

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