Formation of Graphene Sheets Through Laser Exfoliation of Highly Ordered Pyrolytic Graphite
Lam, Nghi Q.
Freestanding two-dimensional (2D) few-layer graphene was formed through laser exfoliation of highly ordered pyrolytic graphite, using a pulsed neodymium-doped yttrium aluminum garnet (Nd:YAG) laser. Graphene sheets of several nanometers in thickness and micrometers in size were obtained. The laser exfoliation process was investigated at different laser fluences and distances between target and substrate. Three different phases, amorphouscarbon, few-layer graphene sheets, and thin graphite films, were obtained as the laser fluence increased. This study reveals an existing route of forming freestanding 2D nanostructures through laser exfoliation.
M. Qian et al., "Formation of Graphene Sheets Through Laser Exfoliation of Highly Ordered Pyrolytic Graphite," Applied Physics Letters, American Institute of Physics (AIP), Jan 2011.
The definitive version is available at http://dx.doi.org/10.1063/1.3584021
Mechanical and Aerospace Engineering
Keywords and Phrases
Graphene; Carbon; Graphite; Laser Ablation; Epitaxy; Amorphous State; Nanostructures; Nd:YAG Lasers; Scanning Electron Microscopy; Transmission Electron Microscopy
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© 2011 American Institute of Physics (AIP), All rights reserved.