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Using polycyclic aromatic hydrocarbons for graphene growth on Cu(111) under ultra-high vacuum
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Klein, Benedikt P., Stoodley, Matthew A., Edmondson, Matthew, Rochford, Luke A., Walker, Marc, Sattler, Lars, Weber, Sebastian M., Hilt, Gerhard, Williams, Leon B. S., Lee, Tien-Lin, Saywell, Alex, Maurer, Reinhard J. and Duncan, David A. (2022) Using polycyclic aromatic hydrocarbons for graphene growth on Cu(111) under ultra-high vacuum. Applied Physics Letters, 121 (19). 191603. doi:10.1063/5.0122914 ISSN 0003-6951.
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WRAP-Using-polycyclic-aromatic-hydrocarbons-graphen-growth-Cu-111-ultra-high-vacuum-22.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (2281Kb) | Preview |
Official URL: http://dx.doi.org/10.1063/5.0122914
Abstract
Ultra-high vacuum deposition of the polycyclic aromatic hydrocarbons azupyrene and pyrene onto a Cu(111) surface held at a temperature of 1000 K is herein shown to result in the formation of graphene. The presence of graphene was proven using scanning tunneling microscopy, x-ray photoelectron spectroscopy, angle-resolved photoemission spectroscopy, Raman spectroscopy, and low energy electron diffraction. The precursors, azupyrene and pyrene, are comparatively large aromatic molecules in contrast to more commonly employed precursors like methane or ethylene. While the formation of the hexagonal graphene lattice could naively be expected when pyrene is used as a precursor, the situation is more complex for azupyrene. In this case, the non-alternant topology of azupyrene with only 5- and 7-membered rings must be altered to form the observed hexagonal graphene lattice. Such a rearrangement, converting a non-alternant topology into an alternant one, is in line with previous reports describing similar topological alterations, including the isomerization of molecular azupyrene to pyrene. The thermal synthesis route to graphene, presented here, is achievable at comparatively low temperatures and under ultra-high vacuum conditions, which may enable further investigations of the growth process in a strictly controlled and clean environment that is not accessible with traditional precursors.
| Item Type: | Journal Article | ||||||||||||||||||
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| Subjects: | Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Science > Physics Faculty of Science, Engineering and Medicine > Science > Chemistry > Computational and Theoretical Chemistry Centre |
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| Library of Congress Subject Headings (LCSH): | Graphene , Polycyclic aromatic hydrocarbons , Graphene -- Synthesis, Graphene -- Industrial applications | ||||||||||||||||||
| Journal or Publication Title: | Applied Physics Letters | ||||||||||||||||||
| Publisher: | American Institute of Physics | ||||||||||||||||||
| ISSN: | 0003-6951 | ||||||||||||||||||
| Official Date: | 10 November 2022 | ||||||||||||||||||
| Dates: |
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| Volume: | 121 | ||||||||||||||||||
| Number: | 19 | ||||||||||||||||||
| Article Number: | 191603 | ||||||||||||||||||
| DOI: | 10.1063/5.0122914 | ||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||
| Date of first compliant deposit: | 16 November 2022 | ||||||||||||||||||
| Date of first compliant Open Access: | 16 November 2022 | ||||||||||||||||||
| RIOXX Funder/Project Grant: |
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