Chemistry, Materials Science and Engineering, Physics and Astronomy, Ames Laboratory
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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.
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Zhou, Yinghui; Lii-Rosales, Ann; Kim, Minsung; Wallingford, Mark; Jing, Dapeng; Tringides, Michael C.; Wang, Cai-Zhuang; and Thiel, Patricia A., "Defect-mediated, thermally-activated encapsulation of metals at the surface of graphite" (2018). Chemistry Publications. 1104.