High-Strength Chemical-Vapor Deposited Graphene and Grain Boundaries

被引：769

作者：

Lee, Gwan-Hyoung ^{[1
,2
]}

Cooper, Ryan C. ^{[1
]}

An, Sung Joo ^{[1
]}

Lee, Sunwoo ^{[3
]}

van der Zande, Arend ^{[1
,4
]}

Petrone, Nicholas ^{[1
]}

Hammerherg, Alexandra G. ^{[1
]}

Lee, Changgu ^{[5
,6
]}

Crawford, Bryan ^{[7
]}

Oliver, Warren ^{[7
]}

Kysar, Jeffrey W. ^{[1
]}

Hone, James ^{[1
]}

机构：

[1] Columbia Univ, Dept Mech Engn, New York, NY 10027 USA

[2] Samsung Sungkyunkwan Univ SKKU Graphene Ctr SSGC, Suwon 440746, South Korea

[3] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA

[4] Columbia Univ, Energy Frontier Res Ctr, New York, NY 10027 USA

[5] SKKU, Sch Mech Engn, Suwon 440746, Gyeonggi, South Korea

[6] SKKU, SKKU Adv Inst Nanotechnol SAINT, Suwon 440746, Gyeonggi, South Korea

[7] Nanomechanics, Oak Ridge, TN 37830 USA

来源：

SCIENCE | 2013年 / 340卷 / 6136期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1126/science.1235126

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Pristine graphene is the strongest material ever measured. However, large-area graphene films produced by means of chemical vapor deposition (CVD) are polycrystalline and thus contain grain boundaries that can potentially weaken the material. We combined structural characterization by means of transmission electron microscopy with nanoindentation in order to study the mechanical properties of CVD-graphene films with different grain sizes. We show that the elastic stiffness of CVD-graphene is identical to that of pristine graphene if postprocessing steps avoid damage or rippling. Its strength is only slightly reduced despite the existence of grain boundaries. Indentation tests directly on grain boundaries confirm that they are almost as strong as pristine. Graphene films consisting entirely of well-stitched grain boundaries can retain ultrahigh strength, which is critical for a large variety of applications, such as flexible electronics and strengthening components.

引用

页码：1073 / 1076

页数：4

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