Correlation between micrometer-scale ripple alignment and atomic-scale crystallographic orientation of monolayer graphene
- Konkuk Univ. Seoul (Korea); Creative Research Center for Graphene Electronics, Electronics and Telecommunications Research Institute (ETRI), Daejeon (Korea)
- Univ. of Seoul, Seoul (Korea)
- Korea Institute for Advanced Study, Seoul (Korea)
- Konkuk Univ. Seoul (Korea)
- Creative Research Center for Graphene Electronics, Electronics and Telecommunications Research Institute (ETRI), Daejeon (Korea)
- 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
Web of Science
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 |
Similar Records
Deconstructing proton transport through atomically thin monolayer CVD graphene membranes
Laboratory-Scale Coal-Derived Graphene Process (Final Report)