Flipping nanoscale ripples of free-standing graphene using a scanning tunneling microscope tip

被引：20

作者：

Breitwieser, Romain ^{[1
]}

Hu, Yu-Cheng ^{[1
]}

Chao, Yen Cheng ^{[1
]}

Li, Ren-Jie ^{[2
]}

Tzeng, Yi Ren ^{[3
]}

Li, Lain-Jong ^{[4
]}

Liou, Sz-Chian ^{[1
]}

Lin, Keng Ching ^{[2
]}

Chen, Chih Wei ^{[1
]}

Pai, Woei Wu ^{[1
]}

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan

[2] Catholic Fu Jen Univ, Dept Phys, Taipei 242, Taiwan

[3] Inst Nucl Energy Res, Taoyuan 325, Taiwan

[4] Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan

来源：

CARBON | 2014年 / 77卷

关键词：

SUSPENDED GRAPHENE; MONOLAYER GRAPHENE; RESONATORS; DYNAMICS; SHEETS;

D O I：

10.1016/j.carbon.2014.05.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present a scanning tunneling microscopy study of the stress-strain behavior of a rippled single-layer free-standing graphene (FSG) and report that FSG exhibits a non-linear sigmoidal stress-strain behavior. We managed to pull and push nanoripples by controlling the STM tip-FSG interaction forces. In this way, we found that the initial deformations of a rippled FSG involve sign reversals of the nanoripple's local curvatures, termed "flipping". In contrast to elastic deformation of graphene, flipping of a FSG nanoripple encounters a stress barrier and therefore makes a rippled FSG metastable, as evidenced by monitoring a yielding process in both experiments and molecular dynamics simulations. The evolution of nanoripples subjected to STM control is also fully consistent with atom-resolved images. Our work therefore shows how rippled 2D carbon deforms at nanoscale. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：236 / 243

页数：8

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