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Nano Research 2009, 2(4): 336-342 https://doi.org/10.1007/s12274-009-9031-x
Research Article | Open Access | Issue | Published: 01 April 2009

Chemical Self-Assembly of Graphene Sheets

Show Author's Information Hailiang Wang,  Xinran Wang,  Xiaolin Li,  Hongjie Dai( )
Department of Chemistry and Laboratory for Advanced MaterialsStanford UniversityStanford, CA94305USA
Keywords:
self-assembly, Chemically derived graphene sheets, graphene devices, electrical annealing
Cite this article:
Wang H, Wang X, Li X, et al. Chemical Self-Assembly of Graphene Sheets. Nano Research, 2009, 2(4): 336-342. https://doi.org/10.1007/s12274-009-9031-x
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Abstract Full text Electronic supplementary material About this article

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.


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Electronic supplementary material
About this article

Chemical Self-Assembly of Graphene Sheets

Show Author's information Hailiang Wang, Xinran Wang, Xiaolin Li, Hongjie Dai( )
Department of Chemistry and Laboratory for Advanced MaterialsStanford UniversityStanford, CA94305USA

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.

Keywords: self-assembly, Chemically derived graphene sheets, graphene devices, electrical annealing

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Publication history

Received: 28 January 2009
Revised: 19 February 2009
Accepted: 19 February 2009
Published: 01 April 2009
Issue date: April 2009

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© Tsinghua University Press and Springer-Verlag 2009

Acknowledgements

Acknowledgements

This work is supported by MARCO-MSD, ONR, and Intel.

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This article is published with open access at Springerlink.com

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