Laser scribing on HOPG for graphene stamp printing on silicon wafer |
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Authors: | Jelena Butikova Boris Polyakov Lauris Dimitrocenko Edgars Butanovs Ivars Tale |
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Affiliation: | 1235. Institute of Solid State Physics, 8 Kengaraga St., LV-1063, Riga, Latvia
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Abstract: | Highly oriented pyrolytic graphite (HOPG) was scribed by pulsed laser beam to produce square patterns. Patterning of HOPG surface facilitates the detachment of graphene layers during contact printing. Direct HOPG-to-substrate and glue-assisted stamp printing of a few-layers graphene was compared. Printed graphene sheets were visualized by optical and scanning electron microscopy. The number of graphene layers was measured by atomic force microscopy. Glue-assisted stamp printing allows printing relatively large graphene sheets (40×40 μm) onto a silicon wafer. The presented method is easier to implement and is more flexible than the majority of existing ways of placing graphene sheets onto a substrate. |
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