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Free-standing graphene at atomic resolution
| Venue: | Nat. Nanotechnol |
| Citations: | 10 - 0 self |
BibTeX
@ARTICLE{Gass_free-standinggraphene,
author = {Mhairi H. Gass and Ursel Bangert and Andrew L. Bleloch and Peng Wang and Rahul R. Nair and A. K. Geim},
title = {Free-standing graphene at atomic resolution},
journal = {Nat. Nanotechnol},
year = {},
pages = {676--681}
}
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Abstract
Research interest in graphene, a two-dimensional crystal consisting of a single atomic plane of carbon atoms, has been driven by its extraordinary properties, including charge carriers that mimic ultra-relativistic elementary particles. Moreover, graphene exhibits ballistic electron transport on the submicrometre scale, even at room temperature, which has allowed the demonstration of graphene-based field-effect transistors and the observation of a room-temperature quantum Hall effect. Here we confirm the presence of free-standing, single-layer graphene with directly interpretable atomic-resolution imaging combined with the spatially resolved study of both the p! p * transition and the p 1 s plasmon. We also present atomic-scale observations of the morphology of free-standing graphene and explore the role of microstructural peculiarities that affect the stability of the sheets. We also follow the evolution and interaction of point defects and suggest a mechanism by which they form ring defects. Recent measurements of the remarkable electronic properties of graphene have resulted in intense research activity on two-dimensional (2D) crystals1–5. Unlike most materials in condensed matter physics, where the Schrödinger equation can be used to describe their electronic properties, for graphene the charge carriers mimic relativistic particles and can thus be described using the Dirac equation3.
Keyphrases
free-standing graphene atomic resolution charge carrier carbon atom electronic property dirac equation3 ultra-relativistic elementary particle research interest room-temperature quantum hall effect intense research activity extraordinary property room temperature atomic-scale observation microstructural peculiarity submicrometre scale relativistic particle remarkable electronic property condensed matter physic recent measurement interpretable atomic-resolution imaging graphene-based field-effect transistor point defect two-dimensional crystal consisting single-layer graphene schro dinger equation single atomic plane graphene exhibit ballistic electron transport
