Graphene on ordered Ni-alloy surfaces formed by metal (Sn, Al) intercalation between graphene/Ni(111)

被引：33

作者：

Addou, Rafik ^{[1
]}

Dahal, Arjun ^{[1
]}

Batzill, Matthias ^{[1
]}

机构：

[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

来源：

SURFACE SCIENCE | 2012年 / 606卷 / 13-14期

关键词：

Graphene; Metal/graphene interfaces; Auger electron spectroscopy; Scanning tunneling microscopy; Surface alloys; MONOLAYER GRAPHITE; NI(111); DEPOSITS; GROWTH; NI3AL;

D O I：

10.1016/j.susc.2012.03.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Deposition and intercalation of Al and Sn on Ni(111) supported graphene is investigated by Auger electron spectroscopy, low energy electron diffraction, and scanning tunneling microscopy. Al intercalates at similar to 200 degrees C while Sn intercalates at similar to 350 degrees C. indicating that the intercalation process is element specific. Both Al and Sn alloy with the Ni-substrate at higher annealing temperatures and form ordered alloy surfaces and surface alloys, respectively. Sn forms a (root 3 x root 3) R30 degrees surface alloy by substituting surface Ni-atoms with Sn and thus the alloy maintains the same good lattice match with graphene as for Ni(111). Both Sn and Al are interacting weakly with graphene and can therefore be used to decouple graphene from the strongly interacting Ni substrate. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：1108 / 1112

页数：5

共 33 条

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