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Directed assembly of Ru nanoclusters on Ru(0001)-supported graphene: STM studies and atomistic modeling

TitleDirected assembly of Ru nanoclusters on Ru(0001)-supported graphene: STM studies and atomistic modeling
Publication TypeJournal Article
Year of Publication2012
AuthorsEngstfeld AK, Hoster HE, Behm RJ, Roelofs LD, Liu XJ, Wang CZ, Han Y, Evans JW
Journal TitlePhysical Review B
Volume86
Pages085442
Date Published08
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000307792100008
Keywordsaugmented-wave method, basis-set, deposition, growth, ISLANDS, metals, ru(0001), total-energy calculations
Abstract

Directed assembly of an array of Ru nanoclusters (NCs) is achieved by deposition of Ru at around room temperature on a single layer of graphene supported on Ru(0001). In this system, directed assembly is guided by the periodic moire structure of the buckled graphene sheet. Behavior is analyzed utilizing both scanning tunneling microscopy and atomistic lattice-gas modeling together with kinetic Monte Carlo simulation. We elucidate the kinetics of NC nucleation and growth, specifically assessing the coverage dependence of the NC density and height distribution. In addition, we provide a detailed characterization of the development of short-range spatial order within the NC array, identifying a tendency for row formation.
URL<Go to ISI>://WOS:000307792100008
DOI10.1103/PhysRevB.86.085442
Alternate JournalPhys. Rev. B