Elastic and frictional properties of graphene

被引：349

作者：

Lee, Changgu ^{[1
]}

Wei, Xiaoding ^{[1
]}

Li, Qunyang ^{[2
]}

Carpick, Robert ^{[2
]}

Kysar, Jeffrey W. ^{[1
]}

Hone, James ^{[1
]}

机构：

[1] Columbia Univ, New York, NY 10025 USA

[2] Univ Penn, Philadelphia, PA 19104 USA

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2009年 / 246卷 / 11-12期

基金：

美国国家科学基金会;

关键词：

MULTIWALLED CARBON NANOTUBES; STRENGTH;

D O I：

10.1002/pssb.200982329

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We describe studies of the elastic properties and frictional characteristics of graphene samples of varying thickness using an atomic force microscope. For tensile testing, graphene is suspended over micron-sized circular holes and indented by atomic force microscope (AFM) tips. Fitting of the force-displacement curves yields the prestress and elastic stiffness, while comparison of the breaking force to simulation gives the ultimate strength, which is the highest measured for any material. Experiments on samples with 1-3 atomic layers yield similar values for the intrinsic stiffness and strength of a single sheet, but also reveal differences in mechanical behavior with thickness. The frictional force between an AFM tip and graphene decreases with thickness for samples from 1 to 4 layers, and does not depend on the presence of a substrate. High-resolution friction force imaging in stick-slip mode shows the same trend, and allows direct imaging of the crystal lattice. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim

引用

页码：2562 / 2567

页数：6

共 26 条

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