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Title: Correlation between micrometer-scale ripple alignment and atomic-scale crystallographic orientation of monolayer graphene

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep07263· OSTI ID:1256046
 [1];  [2];  [3];  [3];  [4];  [4];  [4];  [1];  [5];  [6];  [6];  [4]
  1. Konkuk Univ. Seoul (Korea); Creative Research Center for Graphene Electronics, Electronics and Telecommunications Research Institute (ETRI), Daejeon (Korea)
  2. Univ. of Seoul, Seoul (Korea)
  3. Korea Institute for Advanced Study, Seoul (Korea)
  4. Konkuk Univ. Seoul (Korea)
  5. Creative Research Center for Graphene Electronics, Electronics and Telecommunications Research Institute (ETRI), Daejeon (Korea)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Deformation normal to the surface is intrinsic in two-dimensional materials due to phononic thermal fluctuations at finite temperatures. Graphene's negative thermal expansion coefficient is generally explained by such an intrinsic property. Recently, friction measurements on graphene exfoliated on a silicon oxide surface revealed an anomalous anisotropy whose origin was believed to be the formation of ripple domains. Here, we uncover the atomistic origin of the observed friction domains using a cantilever torsion microscopy in conjunction with angle-resolved photoemission spectroscopy. We experimentally demonstrate that ripples on graphene are formed along the zigzag direction of the hexagonal lattice. The formation of zigzag directional ripple is consistent with our theoretical model that takes account of the atomic-scale bending stiffness of carbon-carbon bonds and the interaction of graphene with the substrate. Lastly, the correlation between micrometer-scale ripple alignment and atomic-scale arrangement of exfoliated monolayer graphene is first discovered and suggests a practical tool for measuring lattice orientation of graphene.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1256046
Journal Information:
Scientific Reports, Vol. 4; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (4)

Barrier Reduction of Lithium Ion Tunneling through Graphene with Hybrid Defects: First-Principles Calculations journal January 2018
Velocity-dependent friction enhances tribomechanical differences between monolayer and multilayer graphene journal October 2019
Configuration of ripple domains and their topological defects formed under local mechanical stress on hexagonal monolayer graphene journal March 2015
Switchable friction enabled by nanoscale self-assembly on graphene text January 2015

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