Self-Assembly of Graphene Nanoblisters Sealed to a Bare Metal Surface

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• 作者：Rosanna Larciprete ; Stefano Colonna ; Fabio Ronci ; Roberto Flammini ; Paolo Lacovig ; Nicoleta Apostol ; Antonio Politano ; Peter Feulner ; Dietrich Menzel ; Silvano Lizzit
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：March 9, 2016
• 年：2016
• 卷：16
• 期：3
• 页码：1808-1817
• 全文大小：694K
• ISSN：1530-6992

文摘

The possibility to intercalate noble gas atoms below epitaxial graphene monolayers coupled with the instability at high temperature of graphene on the surface of certain metals has been exploited to produce Ar-filled graphene nanosized blisters evenly distributed on the bare Ni(111) surface. We have followed in real time the self-assembling of the nanoblisters during the thermal annealing of the Gr/Ni(111) interface loaded with Ar and characterized their morphology and structure at the atomic scale. The nanoblisters contain Ar aggregates compressed at high pressure arranged below the graphene monolayer skin that is decoupled from the Ni substrate and sealed only at the periphery through stable C–Ni bonds. Their in-plane truncated triangular shapes are driven by the crystallographic directions of the Ni surface. The nonuniform strain revealed along the blister profile is explained by the inhomogeneous expansion of the flexible graphene lattice that adjusts to envelop the Ar atom stacks.