2022
DOI: 10.1063/5.0122914
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Using polycyclic aromatic hydrocarbons for graphene growth on Cu(111) under ultra-high vacuum

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 common… Show more

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Cited by 3 publications
(5 citation statements)
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“…Numerous measurements, including scanning tunneling microscopy, X-ray photoelectron spectroscopy, angle-resolved photoemission spectroscopy, Raman spectroscopy, and low-energy electron diffraction, verified the formation of low-defect monolayer graphene by depositing 40 on Cu (111). 111) at 1000 K. [110] 4.5 | Dicyclohepta[cd,gh]pentalene 41: Peripheral 14π-electron system with an isolated ethylene unit…”
Section: Cyclohepta[bc]acenaphthylene 37 and Cyclohepta[klm]benzo[e]i...mentioning
confidence: 99%
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“…Numerous measurements, including scanning tunneling microscopy, X-ray photoelectron spectroscopy, angle-resolved photoemission spectroscopy, Raman spectroscopy, and low-energy electron diffraction, verified the formation of low-defect monolayer graphene by depositing 40 on Cu (111). 111) at 1000 K. [110] 4.5 | Dicyclohepta[cd,gh]pentalene 41: Peripheral 14π-electron system with an isolated ethylene unit…”
Section: Cyclohepta[bc]acenaphthylene 37 and Cyclohepta[klm]benzo[e]i...mentioning
confidence: 99%
“…[ 105–109 ] Indeed, very recently, the formation of hexagonal graphene lattice was observed by ultra‐high vacuum deposition of 40 onto a Cu(111) surface and heating at 1000 K (Figure 12C). [ 110 ] A similar graphene sheet was also formed by changing 40 with pyrene under the same conditions. Numerous measurements, including scanning tunneling microscopy, X‐ray photoelectron spectroscopy, angle‐resolved photoemission spectroscopy, Raman spectroscopy, and low‐energy electron diffraction, verified the formation of low‐defect monolayer graphene by depositing 40 on Cu(111).…”
Section: Synthesis and Characterization Of 36–41mentioning
confidence: 99%
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“…Previous UV/Vis spectroscopy, fluorescence spectroscopy temperature programmed desorption (TPD) and non-contact atomic force microscopy (nc-AFM) measurements on the (111) surface have not indicated the presence of any contaminant molecule. 28,29,37 Notably, prior nc-AFM measurements indicate that the azupyrene adsorbs intact onto the (111) surface and TPD measurements demonstrate that the molecule remains intact on this surface up to a temperature of ∼500 K.…”
Section: Experimental Methodsmentioning
confidence: 99%
“…Sub-monolayers of azupyrene were deposited onto the copper samples, which were held at room temperature, using a specially designed “line of sight” doser, described in greater detail in ref. 37. During deposition, the azupyrene was heated to 55–70 °C using either a warm-water bath or a Peltier heater.…”
Section: Experimental Methodsmentioning
confidence: 99%