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Synthesis of large-area rhombohedral few-layer graphene by chemical vapor deposition on copper

Bouhafs, Chamseddine ; Pezzini, Sergio ; Geisenhof, Fabian R. ; Mishra, Neeraj ; Mišeikis, Vaidotas ; Niu, Yuran LU ; Struzzi, Claudia LU orcid ; Weitz, R. Thomas ; Zakharov, Alexei A. LU and Forti, Stiven , et al. (2021) In Carbon 177. p.282-290
Abstract

Rhombohedral-stacked few-layer graphene (FLG) displays peculiar electronic properties that could lead to phenomena such as high-temperature superconductivity and magnetic ordering. To date, experimental studies have been mainly limited by the difficulty in isolating rhombohedral FLG with thickness exceeding 3 layers and device-compatible size. In this work, we demonstrate the synthesis and transfer of rhombohedral graphene with thickness up to 9 layers and areas up to ∼50 μm2. The domains of rhombohedral FLG are identified by Raman spectroscopy and are found to alternate with Bernal regions within the same crystal in a stripe-like configuration. Near-field nano-imaging further confirms the structural integrity of the... (More)

Rhombohedral-stacked few-layer graphene (FLG) displays peculiar electronic properties that could lead to phenomena such as high-temperature superconductivity and magnetic ordering. To date, experimental studies have been mainly limited by the difficulty in isolating rhombohedral FLG with thickness exceeding 3 layers and device-compatible size. In this work, we demonstrate the synthesis and transfer of rhombohedral graphene with thickness up to 9 layers and areas up to ∼50 μm2. The domains of rhombohedral FLG are identified by Raman spectroscopy and are found to alternate with Bernal regions within the same crystal in a stripe-like configuration. Near-field nano-imaging further confirms the structural integrity of the respective stacking orders. Combined spectroscopic and microscopic analyses indicate that rhombohedral-stacking formation is strongly correlated to the underlying copper step-bunching and emerges as a consequence of interlayer displacement along preferential crystallographic orientations. The growth and transfer of rhombohedral FLG with the reported thickness and size shall facilitate the observation of predicted unconventional physics and ultimately add to its technological relevance.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Carbon
volume
177
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85102069350
ISSN
0008-6223
DOI
10.1016/j.carbon.2021.02.082
language
English
LU publication?
yes
id
0dfe8e24-a017-4c3d-b922-89662c250593
date added to LUP
2021-03-16 11:05:13
date last changed
2025-04-04 14:25:50
@article{0dfe8e24-a017-4c3d-b922-89662c250593,
  abstract     = {{<p>Rhombohedral-stacked few-layer graphene (FLG) displays peculiar electronic properties that could lead to phenomena such as high-temperature superconductivity and magnetic ordering. To date, experimental studies have been mainly limited by the difficulty in isolating rhombohedral FLG with thickness exceeding 3 layers and device-compatible size. In this work, we demonstrate the synthesis and transfer of rhombohedral graphene with thickness up to 9 layers and areas up to ∼50 μm<sup>2</sup>. The domains of rhombohedral FLG are identified by Raman spectroscopy and are found to alternate with Bernal regions within the same crystal in a stripe-like configuration. Near-field nano-imaging further confirms the structural integrity of the respective stacking orders. Combined spectroscopic and microscopic analyses indicate that rhombohedral-stacking formation is strongly correlated to the underlying copper step-bunching and emerges as a consequence of interlayer displacement along preferential crystallographic orientations. The growth and transfer of rhombohedral FLG with the reported thickness and size shall facilitate the observation of predicted unconventional physics and ultimately add to its technological relevance.</p>}},
  author       = {{Bouhafs, Chamseddine and Pezzini, Sergio and Geisenhof, Fabian R. and Mishra, Neeraj and Mišeikis, Vaidotas and Niu, Yuran and Struzzi, Claudia and Weitz, R. Thomas and Zakharov, Alexei A. and Forti, Stiven and Coletti, Camilla}},
  issn         = {{0008-6223}},
  language     = {{eng}},
  pages        = {{282--290}},
  publisher    = {{Elsevier}},
  series       = {{Carbon}},
  title        = {{Synthesis of large-area rhombohedral few-layer graphene by chemical vapor deposition on copper}},
  url          = {{http://dx.doi.org/10.1016/j.carbon.2021.02.082}},
  doi          = {{10.1016/j.carbon.2021.02.082}},
  volume       = {{177}},
  year         = {{2021}},
}