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Although homogeneous, high quality graphene can be fabricated on a Cu or Ni sheet using the traditional chemical vapour deposition method at high temperatures (over 1000 °C) under specific atmospheric conditions, their transfer to another substrate is difficult. In this paper a novel method of rapidly (i.e. 3-6 s of laser irradiation) producing a large area (>3 cm 2) graphene film from olive oil on a glass surface (pre-coated with a 5-28 nm thick Ni film) with defocused, large area continuous laser irradiation is described. The turbostratic graphene film (6 layers) grown in such a way has shown high electrical conductivity (sheet resistance of around 20 Ω sq -1) and an optical transmittance of 40-50%. With femtosecond laser patterning, 70% optical transparency was demonstrated. Continuous large area graphene was formed at relatively lower temperatures (<250 °C) and without the need for specific atmospheric conditions. The basic process characteristics and mechanisms involved are discussed.
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Allegre, O., Crosby, D., Domingos, M., Francis, J., Gillen, D., Guo, W., Li, L., Mativenga, P., Rogers, B. D., Whitehead, D., Wilson, D., Zhong, S., Mirhosseini, N., Ouyang, J., Huang, Y., Wei, C., Cheng, D., Suryo Pratomo, E., Zhang, Z., Li, Z., Mo, H., Zhu, M., Li, Q., Liu, W., Wang, L., Guo, H., Heinemann, R. & Liu, Z.
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