Low temperature growth of fully covered single-layer graphene using a CoCu catalyst

Hisashi Sugime, Lorenzo D'Arsié, Santiago Esconjauregui, Guofang Zhong, Xingyi Wu, Eugen Hildebrandt, Hikmet Sezen, Matteo Amati, Luca Gregoratti, Robert S. Weatherup, John Robertson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A bimetallic CoCu alloy thin-film catalyst is developed that enables the growth of uniform, high-quality graphene at 750 °C in 3 min by chemical vapour deposition. The growth outcome is found to vary significantly as the Cu concentration is varied, with ∼1 at% Cu added to Co yielding complete coverage single-layer graphene growth for the conditions used. The suppression of multilayer formation is attributable to Cu decoration of high reactivity sites on the Co surface which otherwise serve as preferential nucleation sites for multilayer graphene. X-ray photoemission spectroscopy shows that Co and Cu form an alloy at high temperatures, which has a drastically lower carbon solubility, as determined by using the calculated Co-Cu-C ternary phase diagram. Raman spectroscopy confirms the high quality (ID/IG < 0.05) and spatial uniformity of the single-layer graphene. The rational design of a bimetallic catalyst highlights the potential of catalyst alloying for producing two-dimensional materials with tailored properties.

Original languageEnglish
Pages (from-to)14467-14475
Number of pages9
JournalNanoscale
Volume9
Issue number38
DOIs
Publication statusPublished - 2017 Oct 14

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Growth temperature
Graphene
Catalysts
Multilayers
Photoelectron spectroscopy
X ray spectroscopy
Alloying
Phase diagrams
Raman spectroscopy
Chemical vapor deposition
Nucleation
Carbon
Solubility
Thin films
Temperature

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Sugime, H., D'Arsié, L., Esconjauregui, S., Zhong, G., Wu, X., Hildebrandt, E., ... Robertson, J. (2017). Low temperature growth of fully covered single-layer graphene using a CoCu catalyst. Nanoscale, 9(38), 14467-14475. https://doi.org/10.1039/c7nr02553j

Low temperature growth of fully covered single-layer graphene using a CoCu catalyst. / Sugime, Hisashi; D'Arsié, Lorenzo; Esconjauregui, Santiago; Zhong, Guofang; Wu, Xingyi; Hildebrandt, Eugen; Sezen, Hikmet; Amati, Matteo; Gregoratti, Luca; Weatherup, Robert S.; Robertson, John.

In: Nanoscale, Vol. 9, No. 38, 14.10.2017, p. 14467-14475.

Research output: Contribution to journalArticle

Sugime, H, D'Arsié, L, Esconjauregui, S, Zhong, G, Wu, X, Hildebrandt, E, Sezen, H, Amati, M, Gregoratti, L, Weatherup, RS & Robertson, J 2017, 'Low temperature growth of fully covered single-layer graphene using a CoCu catalyst', Nanoscale, vol. 9, no. 38, pp. 14467-14475. https://doi.org/10.1039/c7nr02553j
Sugime H, D'Arsié L, Esconjauregui S, Zhong G, Wu X, Hildebrandt E et al. Low temperature growth of fully covered single-layer graphene using a CoCu catalyst. Nanoscale. 2017 Oct 14;9(38):14467-14475. https://doi.org/10.1039/c7nr02553j
Sugime, Hisashi ; D'Arsié, Lorenzo ; Esconjauregui, Santiago ; Zhong, Guofang ; Wu, Xingyi ; Hildebrandt, Eugen ; Sezen, Hikmet ; Amati, Matteo ; Gregoratti, Luca ; Weatherup, Robert S. ; Robertson, John. / Low temperature growth of fully covered single-layer graphene using a CoCu catalyst. In: Nanoscale. 2017 ; Vol. 9, No. 38. pp. 14467-14475.
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