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Defect-mediated, thermally-activated encapsulation of metals at the surface of graphite

TitleDefect-mediated, thermally-activated encapsulation of metals at the surface of graphite
Publication TypeJournal Article
Year of Publication2018
AuthorsZhou, YH, Lii-Rosales, A, Kim, M, Wallingford, M, Jing, DP, Tringides, MC, Wang, CZ, Thiel, PA
Date Published02
Type of ArticleArticle
ISBN Number0008-6223
Accession NumberWOS:000417484000036
Keywordschemistry, copper, dysprosium, Graphene, Graphite, intercalation, intercalation compounds, Materials Science, morphology, ruthenium

We show that 3 metals - Dy, Ru, and Cu - can form multilayer intercalated (encapsulated) islands at the graphite (0001) surface if 2 specific conditions are met: Defects are introduced on the graphite terraces to act as entry portals, and the metal deposition temperature is well above ambient. Focusing on Dy as a prototype, we show that surface encapsulation is much different than bulk intercalation, because the encapsulated metal takes the form of bulk-like rafts of multilayer Dy, rather than the dilute, single-layer structure known for the bulk compound. Carbon-covered metallic rafts even form for relatively unreactive metals (Ru and Cu) which have no known bulk intercalation compound. (C) 2017 Elsevier Ltd. All rights reserved.

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Surface Structures