Chemical Self Assembly of Graphene Sheets

Details Chemical Self Assembly of Graphene Sheets Chemical Self Assembly of Graphene Sheets

2009-02-21

arxiv.org/abs/0902.3703v1

Physics

Condensed Matter

Materials Science

Nano Research, in press, http://www.thenanoresearch.com

Scientific paper

Chemically derived graphene sheets were found to self-assemble onto patterned gold structures via electrostatic interactions between noncovalent functional groups on GS and gold. This afforded regular arrays of single graphene sheets on large substrates, characterized by scanning electron and Auger microscopy imaging and Raman spectroscopy. Self assembly was used for the first time to produce on-substrate and fully-suspended graphene electrical devices. Molecular coatings on the GS were removed by high current electrical annealing, which recovered the high electrical conductance and Dirac point of the GS. Molecular sensors for highly sensitive gas detections are demonstrated with self-assembled GS devices.

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