Atomic-Scale Investigation of Graphene Grown on Cu Foil and the Effects of Thermal Annealing

被引：134

作者：

Cho, Jongweon ^{[1
]}

Gao, Li ^{[1
]}

Tian, Jifa ^{[2
,3
]}

Cao, Helin ^{[2
,3
]}

Wu, Wei ^{[4
,5
]}

Yu, Qingkai ^{[5
]}

Yitamben, Esmeralda N. ^{[1
]}

Fisher, Brandon ^{[1
]}

Guest, Jeffrey R. ^{[1
]}

Chen, Yong P. ^{[2
,3
]}

Guisinger, Nathan P. ^{[1
]}

机构：

[1] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

[2] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[3] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA

[4] Univ Houston, Ctr Adv Mat, Houston, TX 77204 USA

[5] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA

来源：

ACS NANO | 2011年 / 5卷 / 05期

基金：

美国国家科学基金会;

关键词：

graphene; chemical vapor deposition; Cu foil; scanning tunneling microscopy; Moire pattern; corrosion; surface oxide; GRAPHITE; FILMS; PHASE;

D O I：

10.1021/nn103338g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have investigated the effects of thermal annealing on ex-situ chemically vapor deposited submonolayer graphene islands on polycrystalline Cu foil at the atomic-scale using ultrahigh vacuum scanning tunneling microscopy. Low-temperature annealed graphene islands on Cu foil (at similar to 430 degrees C) exhibit predominantly striped Moire patterns, indicating a relatively weak interaction between graphene and the underlying polycrystalline Cu foil. Rapid high-temperature annealing of the simple (at 700-800 degrees C) gives rise to the removal of Cu oxide and the recovery of crystallographic features of the copper that surrounds the intact graphene. These experimental observations of continuous crystalline features between the underlying copper (beneath the graphene islands). and the surrounding exposed copper areas revealed by high-temperature annealing demonstrates the impenetrable nature of graphene and its potential application as a protective layer against corrosion.

引用

页码：3607 / 3613

页数：7

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