Temperature-Driven Changes of the Graphene Edge Structure on Ni(111): Substrate vs Hydrogen Passivation

被引：29

作者：

Patera, Laerte L. ^{[1
,3
]}

Bianchini, Federico ^{[1
]}

Troiano, Giulia ^{[4
]}

Dri, Carlo ^{[1
,3
]}

Cepek, Cinzia ^{[3
]}

Peressi, Maria ^{[1
,5
,6
]}

Africh, Cristina ^{[3
]}

Comelli, Giovanni ^{[1
,2
,3
,4
]}

机构：

[1] Univ Trieste, Dept Phys, I-34127 Trieste, Italy

[2] Univ Trieste, Ctr Excellence Nanostruct Mat CENMAT, I-34127 Trieste, Italy

[3] IOM CNR Lab TASC, I-34149 Trieste, Italy

[4] Elettra Sincrotrone Trieste SCpA, I-34149 Trieste, Italy

[5] IOM CNR DEMOCRITOS Natl Simulat Ctr, I-34136 Trieste, Italy

[6] Consorzio Interuniv Nazl Sci & Tecnol Mat INSTM, Unita Ric Trieste, I-34128 Trieste, Italy

来源：

NANO LETTERS | 2015年 / 15卷 / 01期

关键词：

Graphene; edge; hydrogen; nickel; STM; DFT; ATOMISTIC MECHANISMS; H-2; DISSOCIATION; STABILITY;

D O I：

10.1021/nl5026985

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Atomic-scale description of the structure of graphene edges on Ni(111), both during and post growth, is obtained by scanning tunneling microscopy (STM) in combination with density functional theory (DFT). During growth, at 470 degrees C, fast STM images (250 ms/image) evidence graphene flakes anchored to the substrate, with the edges exhibiting zigzag or Klein structure depending on the orientation. If growth is frozen, the flake edges hydrogenate and detach from the substrate, with hydrogen reconstructing the Klein edges.

引用

页码：56 / 62

页数：7

共 10 条

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