Title

Preparation of quasi-free-standing graphene with a super large interlayer distance by methane intercalation

RIS ID

42810

Publication Details

Huang, Q., Chen, X., Lin, J., Li, K., Jia, Y., Liu, J., Guo, L., Wang, W. & Wang, G. (2011). Preparation of quasi-free-standing graphene with a super large interlayer distance by methane intercalation. The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 115 (42), 20538-20545.

Abstract

Preparation of high quality graphene with uniform layers currently remains a bottleneck. In particular, graphene with only one large-sized monolayer is very difficult to obtain. With epitaxial growth of graphene under a hydrogen atmosphere and high temperature, even as high as 1550 °C, the obtained graphene was intercalated by methane and methyl group (−CH3) species. Spontaneously, this intercalation makes the coupling of adjacent layers weak and leads to each layer behaving like free-standing graphene. X-ray diffraction spectra demonstrate that the interdistance of adjacent layers is abnormally large, disclosing each layer suspended by the intercalation, regardless of the layer number. Our findings have opened a possible route to prepare free-standing, high quality graphene effectively in large-scale, behaving like one monolayer free-standing graphene. The Raman spectra also support this conclusion.

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Link to publisher version (DOI)

http://dx.doi.org/10.1021/jp204723k