In this work we present a simple pathway to obtain large single-crystal graphene on copper (Cu) foils with high growth rates using a commercially available cold-wall chemical vapour deposition (CVD) reactor.Weshow that graphene nucleation density is drastically reduced and crystal growth is accelerated when: (i) using ex situ oxidized foils; (ii) performing annealing in an inert atmosphere prior to growth; (iii) enclosing the foils to lower the precursor impingement flux during growth. Growth rates as high as 14.7 and 17.5 μmmin-1 are obtained on flat and folded foils, respectively. Thus, singlecrystal grains with lateral size of about 1mmcan be obtained in just 1 h. The samples are characterized by optical microscopy, scanning electron microscopy, x-ray photoelectron spectroscopy, Raman spectroscopy as well as selected area electron diffraction and low-energy electron diffraction, which confirm the high quality and homogeneity of the films. The development of a process for the quick production of large grain graphene in a commonly used commercial CVDreactor is a significant step towards an increased accessibility to millimetre-sized graphene crystals.
CITATION STYLE
Miseikis, V., Convertino, D., Mishra, N., Gemmi, M., Mashoff, T., Heun, S., … Coletti, C. (2015). Rapid CVD growth of millimetre-sized single crystal graphene using a cold-wall reactor. 2D Materials, 2(1). https://doi.org/10.1088/2053-1583/2/1/014006
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