Nano Archive

Chemical self-assembly of graphene sheets

Wang, Hailiang and Wang, Xinran and Li, Xiaolin and Dai, Hongjie (2009) Chemical self-assembly of graphene sheets. Nano Research, 2 (4). pp. 336-342.

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Abstract

Chemically derived and noncovalently functionalized graphene sheets (GS) were found to self-assemble onto patterned gold structures via electrostatic interactions between the functional groups and the gold surfaces. This afforded regular arrays of single graphene sheets on large substrates, which were characterized by scanning electron microscopy (SEM), Auger microscopy imaging, and Raman spectroscopy. This represents the first time that self-assembly has been used to produce on-substrate and fully-suspended graphene electrical devices. Molecular coatings on the GS were removed by high current "electrical annealing", which restored the high electrical conductance and Dirac point of the GS. Molecular sensors for highly sensitive gas detection using the self-assembled GS devices are demonstrated.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
Material Science > Nanochemistry
ID Code:5479
Deposited By:IoN
Deposited On:22 May 2009 14:04
Last Modified:22 May 2009 14:04

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