Interplay of Wrinkles, Strain, and Lattice Parameter in Graphene on Iridium

被引：130

作者：

Hattab, Hichem ^{[1
,2
]}

N'Diaye, Alpha T. ^{[3
]}

Wall, Dirk ^{[1
,2
]}

Klein, Claudius ^{[1
,2
]}

Jnawali, Giriraj ^{[1
,2
]}

Coraux, Johann ^{[4
,5
]}

Busse, Carsten ^{[3
]}

van Gastel, Raoul ^{[6
]}

Poelsema, Bene ^{[6
]}

Michely, Thomas ^{[3
]}

Heringdorf, Frank-J. Meyer Zu ^{[1
,2
]}

Horn-von Hoegen, Michael ^{[1
,2
]}

机构：

[1] Univ Duisburg Essen, Dept Phys, D-47057 Duisburg, Germany

[2] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CeNIDE, D-47057 Duisburg, Germany

[3] Univ Cologne, Dept Phys, D-50937 Cologne, Germany

[4] CNRS, Inst NEEL, F-38042 Grenoble 9, France

[5] Univ Grenoble 1, F-38042 Grenoble 9, France

[6] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

来源：

NANO LETTERS | 2012年 / 12卷 / 02期

关键词：

Graphene; strain state; wrinkle formation; LEED; iridium; ENERGY-ELECTRON DIFFRACTION; CHEMICAL-VAPOR-DEPOSITION; EPITAXIAL GRAPHENE; THERMAL-EXPANSION; LAYERS; GROWTH; TRANSISTORS; GRAPHITE; FILMS;

D O I：

10.1021/nl203530t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Following graphene growth by thermal decomposition of ethylene on Ir(111) at high temperatures we analyzed the si:rain state and the wrinkle formation kinetics as function of temperature. Using the moire spot separation in a low energy electron diffraction pattern as a magnifying mechanism for the difference in the lattice parameters between Ir and graphene, we achieved an unrivaled relative precision of +/- 0.1 pm for the graphene lattice parameter. Our data reveals a characteristic hysteresis of the graphene lattice parameter that is explained by the interplay of reversible wrinkle formation and film strain, We show that graphene on Ir(111) always exhibits residual compressive strain at room temperature. Our results provide important guidelines for strategies to avoid wrinkling.

引用

页码：678 / 682

页数：5

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