Decoupled High‐Mobility Graphene on Cu(111)/Sapphire via Chemical Vapor Deposition
The growth of high-quality graphene on flat and rigid templates, such as metal thin films on insulating wafers, is regarded as a key enabler for technologies based on 2D materials. In this work, the growth of decoupled graphene is introduced via non-reducing low-pressure chemical vapor deposition (LPCVD) on crystalline Cu(111) films deposited on sapphire. The resulting film is atomically flat, with no detectable cracks or ripples, and lies atop of a thin Cu<sub>2</sub>O layer, as confirmed by microscopy, diffraction, and spectroscopy analyses. Post-growth treatment of the partially decoupled graphene enables full and uniform oxidation of the interface, greatly simplifying subsequent transfer processes, particularly dry-pick up - a task that proves challenging when dealing with graphene directly synthesized on metallic Cu(111). Electrical transport measurements reveal high carrier mobility at room temperature, exceeding 10<sup>4</sup> cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup> on SiO<sub>2</sub>/Si and 10<sup>5</sup> cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</sup> upon encapsulation in hexagonal boron nitride (hBN). The demonstrated growth approach yields exceptional material quality, in line with micro-mechanically exfoliated graphene flakes, and thus paves the way toward large-scale production of pristine graphene suitable for high-performance next-generation applications.
Authors
- Stiven Forti (ORCID: https://orcid.org/0000-0002-8939-3175)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0003-0017-7669)
- Sergio Pezzini (ORCID: https://orcid.org/0000-0003-4289-907X)
- Yurii P. Ivanov (ORCID: https://orcid.org/0000-0003-0271-5504)
- Michał W. Ochapski (ORCID: https://orcid.org/0000-0001-8345-008X)
- Giulia Piccinini (ORCID: https://orcid.org/0000-0002-2902-1361)
- Fabio Beltram (ORCID: https://orcid.org/0000-0002-6081-436X)
- Camilla Coletti (ORCID: https://orcid.org/0000-0002-8134-7633)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- Giorgio Divitini (ORCID: https://orcid.org/0000-0003-2775-610X)
- Antonio Rossi (ORCID: https://orcid.org/0000-0003-4574-7215)
- Vaidotas Mišeikis (ORCID: https://orcid.org/0000-0001-6263-4250)
- Zewdu M. Gebeyehu (ORCID: https://orcid.org/0000-0001-6451-6100)
- Alex Boschi (ORCID: https://orcid.org/0000-0001-7562-7340)
- Leonardo Martini (ORCID: https://orcid.org/0000-0001-9669-1480)
- Neeraj Mishra (ORCID: https://orcid.org/0000-0001-6364-985X)
Institutions
- Scuola Normale Superiore (IT)
- Institute of Photonic Sciences (ES)
- National Institute for Materials Science (JP)
- Italian Institute of Technology (IT)
- Istituto Nanoscienze (IT)
- Center for Nanotechnology Innovation (IT)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-09-09
- DOI
- https://doi.org/10.1002/adma.202404590
- Citations
- 12
- Primary Topic
- Graphene research and applications
- Type
- article
- Field-Weighted Citation Impact
- 1.41
Funders
- Scuola Normale Superiore
- Graphene Flagship
- European Commission
- Istituto Italiano di Tecnologia
- Japan Society for the Promotion of Science